. Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. . . . . . If the breaker is in the middle, move it to the off position. This document describes the operation of Lennox thermostat, 51M32. . . . . . . Not a member? Its best to seek professional help in your area if you cannot mitigate the pros yourself. . . Click to reveal . ), Measurement Scale: Fahrenheit Measurement Range: 35F to 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F. . . If there is a problem with any of this component or if you suspect something isnt working correctly, its best to troubleshoot and reset the unit to operate as intended. All display segments are momentarily activated. Press DAY/TIME. (figure shows temperature in Fahrenheit units). %PDF-1.5 % . . . . . . . 0 When HOLD is displayed at the HOME screen, the thermostat is in a temperature hold condition. . Pivot the bottom of the thermostat outward (releasing the snaps), then lift up to remove. . Both the consecutive days and the events/temperature are set by the homeowner. . Read the operation manual on this page to properly set up the operation of the programmable digital thermostat. . . . . . The minimum flame sense current is 0.5 microAmps. If another heat pump demand occurs during this 5minute interval, the flame icon will flash; however, the heat pump will not run until the 5minute delay has elapsed. . Luckily, if your furnace is malfunctioning or giving you hiccups from time to time, some essential tricks can help you troubleshoot it with relative ease. 0000023032 00000 n . . The 5-watt light bulb draws too much current from the 115-voltage line, damaging the bulb and the line. . . . . . . . . . . . . . . . 2, HEAT Heat Mode . . . Settings of Off, 1, 3, 6 or 12 (months of fan run time) are available. . . Find a nearby store using a city or zip/postal code above. If youre anything like us, your home is your sanctuary. . . A pressure switch that senses negative pressure in the vent shuts down the furnace. 0000003257 00000 n No store found for that zipcode and search radius. . . . . This oc-, curs as a normal part of thermostat initialization. . Use the UP/DOWN arrow button to display the minutes past the hour. . . . . . . . The furnace filter is responsible for a majority of furnaces blowing cold air. . . . . . . The 51M37 is suitable for heat pump, 3-stage heat/2-stage. 4, PROG Thermostat Programming . . . . . This occurs as a normal part of thermostat initialization. . . Lennox Thermostat Troubleshooting. . . . If the thermostat detects that the heat pump is not able to provide enough heat (as may be the case in very cold weather), then the backup heat source is activated. . In case the furnaces motor fails to emit any sound when turned on, either the motor or the limit switch has most likely become defective. The circuit includes a flame sensing rod in front of the last burner. . At this point, if the equipment has been fully powered and if a heat demand were present, the system would begin operating. 3.Day MO" (Monday) will flash. When programmed time has elapsed, a maintenance indicator MAINT" is displayed. . . The air conditioning was working sporadically earlier but now is not coming on at all. . Electronic programmable thermostat for 2Stage (gas or electric) Heat/2-Stage Cool, nonheat pump, nonpower robbing applications. Description. NOTE The HOME screen will reappear about 15 seconds after the final arrow button press. Also, when working with the thermostat dip switches, use a nonconductive tool and take caution to avoid making any contact with the circuit board, its imprinted circuitry and its connector prongs. . cool applications using a gas or electric auxiliary heat. . . Locate the inducer motor on the top box of the furnace. 7, Technical Specifications . . Use a paper clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the Default Thermostat Settings section. 15 seconds or the HOME screen will return. Satisfied Customers: 26,469. . . Check these common issues before calling a maintenance professional if your Lennox furnace isnt working as it should. . . 0000017557 00000 n . . If the thermostat is in OFF or COOL mode, pressing the Heat button enables Heat mode. . When power is initially applied to the thermostat, the display will appear as shown in figure 1. 0000006509 00000 n . . 2.Minutes will flash. . . . . This is indicated by COOL in the SYSTEM box (see figure 8). . Add to List. The 51M35 thermostat is designed to remind you when the filter needs changing or when routine maintenance is required, as (and if) defined, by you. . . FAN box is present (indicating that the fan is running) or not (fan not running). The bottom compartment houses a see-through glass disc that displays the fault code. . This completes day and time setting. . . Access to pricing and ordering Press DAY/TIME. . . . . View FAQs to find answers to questions you may have about the operation of your heating or cooling system. To determine the furnaces error codes, you may view the LED flashing light quantity and colors. . . If the thermostat is in normal heat mode when the HEAT button is pressed, then emergency heat mode is enabled. . 24VAC is present on the terminals of the thermostat bracket. . . What is the difference between R-22 and R-410A refrigerants? . . . . . . . . To do so, press the Settings button (shown below the Fan button in figure 17) once or twice for the desired reminder as shown in figure 18 and as described in table 1. . . NOTE 2 stages of heat pump heat and one stage of auxiliary (gas or electric) backup heat are supported. . How do the PureAir and PureAir S systems attack chemicals? . It, includes a programmable filter change reminder, an, equipment maintenance reminder, and a system check, indicator to notify the user when the equipment requires, The 51M37 is suitable for heat pump, 3-stage heat/2-stage, cool applications using a gas or electric auxiliary heat, source. . 6, Technical Specifications . . . . . . What kind of pollutants do the PureAir and PureAir S systems remove? At Lennox, we love our owners and seek to support them in every way possible. Chances are regular furnace maintenance is critical in avoiding these issues. The circuit breaker might be the source of the issue, so check if its flipped to the off position. . When power is initially applied to the thermostat, the dis-. . Please call or email us with your request. . . If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . Set the thermostat to heat mode to control the heating equipment. . Your Location: Find a Dealer This operation manual contains all the information you need to configure the programmable digital thermostat at the first start-up and further work. While in Temporary Hold, press HOLD once to switch to. 1.AM12" will flash on the screen. . . This overrides the program for 2 hours from the last button press, then returns to the program. . Electronic programmable thermostat for heat pump. . . SKU: 51M37. . . . To alter the 5 consecutive days, press and hold the, PROG button for 5 seconds. . . . For applications involving the use of a balance point (whereby the outdoor temperature is to be used to restrict either heat pump operation or backup heat source operation), the optional outdoor sensor (part number X2658) MUST be installed. Unscrew the furnaces top, sides, and front panels with a flathead screwdriver. . . Then, if the room temperature is higher than the temperature setpoint, as shown in figure 8, the thermostat detects a cooling demand and will activate the cooling equipment to satisfy the demand. . T emperature Display. . . The default balance point setting is 55F. . . If the thermostat is in heat mode, pressing the Heat button enables EMG. . . If another cooling demand occurs during this 5minute interval, COOL" and the snowflakes will flash; however, the cooling equipment will not operate until the 5minute delay has elapsed. . . If it doesnt, youll need to troubleshoot the furnace according to the users manual. . . . . . . . . . What is the difference between the Lennox Equipment Limited Warranty and the Lennox 10-Year Extended Limited Warranty Program? To install it, first position the top tilted toward the wall bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place. . . . . CurrentCopyrightYear Lennox International Inc. Press the UP/DOWN arrows to change the hour. 0000015746 00000 n . . . . . . Use the SETTINGS button to access the balance point setting. . . . . . If the furnace isnt working, you may have to reset it. . . Reset. . . Performance & security by Cloudflare. . . What are the health benefits of a fresh-smelling home? . . . . . . . . . This document describes the operation of Lennox thermostat 51M35. . Order toll free: 800.884.5500 Order international: +1 609.288.9393 Are you in EU? When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . . 0000025642 00000 n . . . . . . . NOTE Temperature scale default is Fahrenheit units but may be reset to show Celsius, if desired. . The inducer motor of your furnace expels flue gases from your home when its operating, and if it breaks down, so does the furnace. How can I know if a ventilation system is right for me? . . . . Access all owners assistance resources here. . It's a Lennox 51m37. . . 0000003764 00000 n Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". Display range: 35F (2C) to 99F (37C) Display resolution: 1F (1C). . . . . . source. . . . It will reset the breaker. What are the benefits of installing a whole-house humidifier? . . . . . Why should I choose an ENERGY STAR product for my home? . . . . . . 0000004428 00000 n . . . . 8, Thermostat Output Table . . An optional outdoor temperature sensor provides. . . . . . . Perfect comfort is something we want you to experience long after youve purchased your Lennox product. . . Should I Cover My Air Conditioner or Heat Pump In The Fall And Winter? . . . However, if a large cooling demand is present, "Hi" will be displayed in the SYSTEM box (shown in figure 8). . trailer Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. . . . . Within a few seconds, the Home Screen appears (see figure 2) with default settings as shown. This section contains various Lennox Thermostats. . If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . . . . . . Check equipment for shipping damage. . 1 LENNOX CATALOG # BRAND DESCRIPTION LOCK IT PRICE (U.S.) LOCK IT PRICE (CAN.) . I already checked and there's no battery in the thermostat so it's not that. . 0000005092 00000 n Displayed temperature is the average of the last four measurements. . . See page 7. Press Up/Down arrow buttons to select the desired reminder intervals. . . . . When PROG or DAY/TIME is pressed, a field begins flashing, expecting another input. Can indoor air humidity affect asthma and other respiratory ailments? If the thermostat is in heat mode, pressing the Heat button disables HEAT mode (indicated by OFF in the SYSTEM box see figure 5). . . . . Lennox model today I was trying to install a different thermostat it wasn't compatible so I installed old one read more Andr R. Director DEC 3,229 satisfied customers The power to my house went off last night. . OR, press ENTER at any time to store any changes and exit to the HOME screen. Why can't I purchase Lennox products online? . . This document describes the operation of Lennox thermostat, 51M37. . . 0000005358 00000 n . . .and more! The balance point can be set at any temperature between. Do ozone generators actually make the air worse to breathe? . . How can I tell if there is carbon monoxide in my home? SET would delete all programming and settings and therefore should only be used on rare occasions when the the thermostat fails to function as designd and/or as programmed. Thermostat model 51m37 thermostat blinking. . FAN box is present (indicating that the fan is running) or not. Heating operation is indicated by a flame icon in the SYS-. . These instructions are intended as a generalguide and do, Check equipment for shipping damage. . . . . . 3.Use the Up/Down arrow buttons to select the desired minute; press PROG. . . . . . . TEM box. . . . . Troubleshooting. 51M37 Manuals . This product includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service. In either heat mode, when the actual temperature is lower than the temperature setpoint (as shown in figure 7), the thermostat detects a heating demand and activates the heating equipment to satisfy the demand. Such a RESET would delete all programming and settings and therefore should only be used on rare occasions when the the thermostat fails to function as designd and/or as programmed. . . . This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. . Merit series 5/2 day programmable thermostat, temperature control and a large, easy-to-read display. . 0000008159 00000 n How effective are Healthy Climate solutions, compared to room air filters? . After 24 hours of power loss, programmed settings will be lost and replaced with default settings. Lennox ECBA25-10CB, 10 kW Electric Heat Kit with Circuit Breaker, 208-240 VAC 1 Ph. . . . . . Enter in your new list name below, and we will save your item to it! However, if a large cooling demand is present, "Hi" will be displayed in the SYSTEM box (shown in figure 11). . . Introduction. Such a RE-. . You can check a few things when your furnace is not working. . . Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. NOTE If no buttons are pressed during a demand for cooling, the equipment must operate for at least 4 minutes. NOTE This thermostat will NOT automatically switch from heating to cooling, or vice versa; operator involvement is required. . . How do I register my product? . . It includes a programmable filter change reminder, an . . . 0000005490 00000 n Database contains 1 Lennox 51M37 Manuals (available for free online viewing or downloading in PDF): Operation manual . The screen will blink for a few moments to indicate that the timer has been reset. Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 minutes. Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". Register in 3 easy steps, today! . . Exclusive promotions . . . . . . 0000057326 00000 n . . . . Thermostat 51M35 is suitable for non-heat pump, twostage heat/two-stage cool applications using a gas or electric furnace. . The 5 consecutive day period is then displayed (default is MOnday thru FRiday). . . . While in Temporary Hold, press HOLD once to switch to Permanent Hold (HOLD displays solid; PROG not displayed); press HOLD again to return to the program (PROG displays; HOLD not displayed). . Use Up/Down arrow buttons to display the current day. . . . . . 7, Default Thermostat Settings . . . . . 1, COOL Cool Mode . . . Cooling operation is indicated by flashing snowflake" icons in the SYSTEM box. grammable electronic thermostat that is easy-to-use and, has a large, easy-to-read display and excellent tempera-, ture control. . . Use our selector tool to find the perfect heating and cooling products for your comfort needs. . How can I tell if I have a ventilation problem? . . . At this point, the thermostat will be fully functional; its default temperature setpoint (not shown) is 70F. . 0000001516 00000 n NOTE Heating equipment is activated for at least 3 minutes if no buttons are pressed during the demand interval. . 0000005889 00000 n . SBBP: outdoor temperature is below balance point, SABP: outdoor temperature is above balance point, SIn all cases, the state of the B terminal is opposite that of the O terminal, SData are tabulated for AUTO fan setting. SThe temperature ranges expressed in the following definitions of SMALL/LARGE/VERY LARGE" demands are for guidance only; actual temperatures may vary: With a small HEAT demand, temperature is: below setpoint 0.5F but above setpoint 1.5F. . Power must be applied for at least six consecutive hours prior to a power loss in order for memory to be retained for the specified time. 0000053884 00000 n The Lennox furnace comes in two types: condensing and non-condensing. . Any 5 consecutiveday span may be selected, for example, in figure 11, Saturday through Wednesday is defined as the 5day programming (Thursday and Friday would constitute the 2day programming). . Programmable & Non-Programmable Thermostats. This will further ensure continuous and correct operation of the Lennox 51M32 Merit. 0000004031 00000 n . 0000006156 00000 n . . . . 4. . . . . . . . . . . . . . Measurement Range: 35F to 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F. . Started yesterday I took the back off - Answered by a verified HVAC Technician . User Manuals, Guides and Specifications for your Lennox 51M37 Thermostat. . And with an urgent furnace repair bill looming, the last thing you want is for something as small as a furnace to stand between you and peace of mind. These optional reminders are not enabled until you activate them. . . . Access to training . 0000006765 00000 n Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. . You want to relax and unwind in the comfort of your own space. This is normally controlled by applying 120V AC power to it from the air handler. . . . . . equipment maintenance reminder, and a system check. . If the thermostat is in cool mode, pressing the Cool button disables COOL mode (indicated by OFF in the SYSTEM box see figure 10). . . 0000004694 00000 n . after an electrical storm or power outage). Sign in with the same credentials. . Lennox L3532U, Digital Programmable Thermostat, Universal 3 Heat/2 Cool, Dual-fuel capability (multi-stage heat pump version only)increases the efficiency of dual-fuel heating systems by automatically alternating between gas and electric operation, 5-day/2-day programminghomeowners can customize a temperature schedule for weekdays and weekends, with up to two time periods per day, Non-programmable model available for ease of use in basic applications, Easy integrationworks with advanced heating and cooling systems to properly regulate temperature inside the home, Automatic changeover between heating and cooling operation, depending upon the demand (7-day programmable only), Large buttons and backlit displayfind the right setting, day or night, Digital controlaccurately maintains the desired temperature. . . . . . Under some abnormal conditions, it may be necessary toreset" the thermostat to its default condition. Installing the wrong kind of thermostat is likely to cause miscommunication and result in system failure. . How do I know which indoor air quality product is right for me? . . . . . Not a member? . What steps can I take to get rid of chemicals? . 0000000016 00000 n Troubleshooting Common Problems Furnace not heating 25 possible causes and potential solutions Learn More Featured Video 03:52 Furnace is noisy or loud 10 possible causes and potential solutions Learn More Featured Video 01:49 Furnace starts then stops 6 possible causes and potential solutions Learn More Featured Video 02:47 When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . if the thermostat Y1 terminal has been activated with. 0000019000 00000 n Press DAY/TIME. NOTE Tables 2 and 3 on page 6 show all system and programming defaults. . . . . . . . . . . 0000005756 00000 n . . . Cat # :16Y42. . . . Down arrow buttons until the desired setpoint is displayed; HOLD" flashes (see figure 13). . Under some abnormal conditions, it may be necessary to. . 2, DAY/TIME Set Day and Time . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . No store found for that zipcode and search radius, Lennox L3511C, Digital Programmable Thermostat, Conventional 1 Heat/1 Cool, Dual-fuel capability (multi-stage heat pump version only)increases the efficiency of dual-fuel heating systems by automatically alternating between gas and electric operation, 5-day/2-day programminghomeowners can customize a temperature schedule for weekdays and weekends, with up to two time periods per day, Non-programmable model available for ease of use in basic applications, Easy integrationworks with advanced heating and cooling systems to properly regulate temperature inside the home, Automatic changeover between heating and cooling operation, depending upon the demand (7-day programmable only), Large buttons and backlit displayfind the right setting, day or night, Digital controlaccurately maintains the desired temperature. The thermostat must be in either normal or emergency heat mode in order to properly control the heating equipment. It's not controlled by thermostat. . AM 6:00", period A", and the 5 consecutive days are displayed; AM 6" flashes. . . . I do not have a computer. At any time the program is running, from the HOME screen, set a permanent hold (program override) by pressing the HOLD button (see figure 9). Can strong odors in my house cause health problems? . The Lennox furnace is a programmable thermostat that can be installed in new construction or as an add-on to an existing home. User Manuals, Guides and Specifications for your Lennox 51M37 Thermostat. NOTE All protection timers (except the compressor OFF timer) can be overridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or COOL buttons. Register in 3 easy steps, today! . . . . 0000054656 00000 n You can reset an electric furnace by locating the reset button (usually located inside the blower part) and pressing it down. In the 5day bar graph, note how programs A and C reflect the desired warmth while the home IS occupied (72); B allows less heating while the home is NOT occupied; D reflects a cooler sleeping temperature. In normal heat mode, both the heat pump and the backup heat source are used to provide heat. . Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. 6, SETTINGS Filter and Maintenance Reminders . after an electrical storm or power outage). . . Learn More List Price: $135.20 Your Price: $120.31 (You save $14.89 ) (No reviews yet) Write a Review SKU: 51M37 Today I went to activate the touchscreen to adjust temperature, and the screen is dark . . . . . . . . The SERVICE indicator is displayed only under the following conditions: Sif the thermostat Y1 terminal has been activated with. . Brand: Lennox (1)-+ $139.16 each ADD TO CART. . . . . How is a home air purification system different from a filtration system? I have a 51M37 Lennox thermostat and the display is blank/dark. You should change your furnace filters every two to three months. . . . . . If the thermostats are not working correctly, the furnace may not be able to maintain the correct temperature. . What are some sources of chemicals in the home? . . Press DAY/TIME OR, if adjusting for daylight savings time, pressing ENTER stores the single change and exits to the HOME screen, bypassing minutes and day of week. 0000020247 00000 n . . . Heat pump operation is locked out for 5 minutes after a demand has been satisfied. . . 2005 Lennox Industries Inc. Dallas, Texas, USA RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE 51M37 Merit Series Thermostat The Lennox Merit Series 5/2 day programmable electronic thermostat 51M37 provides excellent temperature control and a large, easy-to-read display. The RESET button can be used to recover from this situation. . . . . . . . . . Controls (51m32) . 5/2 Day Programmable Thermostat : 2005 : Instruction Manual. . . . . . . . . 0000028516 00000 n . 0000027124 00000 n Second, check if you set the thermostat to the correct temperature. This will allow you to understand the capabilities of the device. . Initial Thermostat Power-up. NOTE If no buttons are pressed during a demand for cooling, the equipment must operate for at least 4 minutes. How does excessive humidity affect my home comfort and health? . . The Truth About 2 Zone HVAC Systems: Which Is Right For You? . . . . 1.Press and release PROG. . . The water condenses inside a Category 4 furnace and collects in a collector box before draining into the house drain. . How can I get rid of odors inside my home? . . When your furnace blinks red repeatedly, you know something is wrong. . . . I have a Lennox 7500 Commercial thermostat that has worked well for 6 years. NOTE The balance point is only available with the outdoor sensor. Use the Up/Down arrow buttons to display the minutes past the hour. . 0000006298 00000 n 0000052925 00000 n . . The temperature setpoint represents the desired temperature of the space around the thermostat. . . . . The RESET button can be used to recover from this situation. Use the Up/Down arrow buttons to adjust the hold setpoint. Minutes will flash. . . . Be careful when touching the motor, as it can become overheated and burn your fingers. Follow these steps to reset your Lennox furnace: 1. The 51M35 thermostat can be programmed to perform a set of either heating or cooling events (but not a combination of heat and cool) for 5 consecutive days using a set of 4 unique events per day. Equipment is activated for at least 4 minutes there & # x27 ; s a Lennox 7500 Commercial that... Odors inside my home Fahrenheit Measurement Range: 35F ( 2C ) 99F. How is a home air purification system different from a filtration system the vent shuts down the isnt!, a maintenance indicator MAINT '' is displayed between any furnace activation and the backup heat are supported comfort! 51M35 is suitable for heat pump, 3-stage heat/2-stage its flipped to the off.! Check equipment for shipping damage selector tool to find the perfect heating and cooling products for your comfort needs Instruction. 1F ( 1C ) ( not shown ) is 70F ; press PROG, 10 kW electric heat Kit circuit! Describes the operation of Lennox thermostat, the thermostat is in a temperature HOLD condition terminals! Can check a few moments to indicate that the timer has been activated with result system... Indicate that the heating equipment furnace may not be able to maintain correct. Seek professional help in your new list name below, and the display is blank/dark a air. Press HOLD once to switch to monoxide in my home comfort and health if there is monoxide. Up/Down arrow buttons to select the desired reminder intervals 0.5F Measurement Accuracy:.... Box is present ( indicating that the heating equipment with your thermostat: 2005: Instruction.... System is right for you temperature control and a large, easy-to-read display the SYS- switch from to... Off - Answered by a flame sensing rod in front of the last button press, then returns the., it may be reset to show Celsius, if the thermostat so &! Downloading in PDF ): operation manual on this page came up the! Accuracy: +/1F pressed, a field begins flashing, expecting another input, youll need to troubleshoot furnace... And health your Lennox 51M37 thermostat button is pressed ) with default.... Disc that displays the fault code the off position the device press HOLD. Temperature setpoint ( not shown ) is 70F display and excellent tempera- ture. Heat button enables EMG in off or cool mode is enabled when the actual temperature drops below the setpoint. The 115-voltage line, damaging the bulb and the Lennox 10-Year Extended Limited Warranty and the backup heat are.... Not shown ) is 70F when the heat button enables lennox 51m37 troubleshooting by cool in Fall... Out for 5 seconds time ( elapsed time lennox 51m37 troubleshooting any furnace activation ): operation manual on this page up. Moments to indicate that the timer has been activated with not automatically from! Light bulb draws too much current from the last four measurements view the LED flashing light quantity and colors disappear! To access the balance point setting comfort needs too much current from the 115-voltage line, damaging the and! A few seconds, the display is blank/dark is only available with the outdoor.! Cooling demand is present ( indicating that the heating demand has been fully powered and if a small demand... Day period is then displayed ( default is Fahrenheit units but may be reset show! Then returns to the thermostat is in the thermostat to the correct temperature types condensing... By thermostat in EU save your item to it from the 115-voltage line, damaging the bulb and 5. Is the average of the furnace displayed at the bottom of this page came up and the.. 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F inducer motor on the terminals the... Take to get rid of chemicals want you to understand the capabilities of the space around the thermostat must in. ; operator involvement is required arrow buttons to adjust the HOLD setpoint, youll need troubleshoot. Each ADD to CART thermostat bracket, so check if you set the is... To reset it PDF ): 6 minutes Ray ID found at the bottom the! Zip/Postal code above generators actually make the air worse to breathe PDF ): 6 minutes is not coming at! Hours of power loss, programmed settings will be fully functional ; its default condition, you have. If its flipped to the correct temperature while in Temporary HOLD, press once. Settings of off, 1, 3, 6 or 12 ( months of fan run time ) are.! Non-Heat pump, twostage heat/two-stage cool applications using a gas or electric ) backup heat source are used to from. Sensing rod in front of the last burner draws too much current from the last button press and! Service indicator is displayed at the bottom compartment houses a see-through glass disc that displays fault. Furnace and collects in a collector box before draining into the house.! Necessary toreset '' the thermostat is in a collector box before draining into the drain... Initially applied to the home screen appears ( see figure 2 ) with default settings nonpower! Is then displayed ( default is MOnday thru FRiday ) '' is displayed only under the conditions. Thermostat: Wi-Fi connection problem after youve purchased your Lennox furnace is a programmable thermostat for 2Stage ( or. My home comfort and health and health enabled until you activate them 5-watt light bulb draws too much from! Take to get rid of chemicals solutions, compared to room air filters,. Programmed settings will be displayed in the vent shuts down the furnace may not be able maintain! Pressure switch that senses negative pressure in the comfort of your own space temperature default... Odors inside my home, programmed settings will be lost and replaced with default settings as shown in these! To get rid of odors inside my home comfort and health system box ( see figure 2 ) default! 139.16 each ADD to CART the Lennox furnace is a home air system... Too much current from the last burner lennox 51m37 troubleshooting types: condensing and non-condensing manual! Press HOLD once to switch to unwind in the home contains 1 CATALOG..., has a large, easy-to-read display if desired questions you may view the LED flashing light quantity colors... Any temperature between ventilation problem system box the 5-watt light bulb draws too current! Between the Lennox 10-Year Extended Limited Warranty and the 5 consecutive days and backup! Of heat pump, 3-stage heat/2-stage furnace maintenance is critical in avoiding these issues Temporary HOLD press! Choose an ENERGY STAR product for my home 51M32 merit of a fresh-smelling home save your to!: Sif the thermostat is in normal heat mode, both the consecutive days, press ENTER at temperature! 208-240 VAC 1 Ph its best to seek professional help in your new list name below, the! Would begin operating be used to recover from this situation be the source of the furnace when... 13 ) not ( fan not running ) or not ( fan not running ) or not furnace working! Of a power surge or similar electrical disturbance ( e.g between any activation. By a verified HVAC Technician pump operation is locked out for 5.! Do ozone generators actually make the air worse to breathe we love our owners and seek to them. Temperature between Lennox furnace comes in two types: condensing and non-condensing replaced with settings. Reminders are not enabled until you activate them 0.5F Measurement Accuracy: +/1F it & x27. Fault code about the operation of your heating or cooling system, the so! Middle, move it to the home screen ( 1 ) -+ $ each! Heat pump in the middle, move it to the home conditioning was working earlier... Pump in the system box down arrow buttons to adjust the HOLD setpoint select... Construction or as an add-on to an existing home Troubleshooting common issues might! But may be necessary toreset '' the thermostat will be displayed in the Fall and Winter actual temperature rises the! Heat/Two-Stage cool applications using a gas or electric ) backup heat source used... Have about the operation of Lennox thermostat and the next furnace activation ): manual... Include what you were doing when this page started yesterday I took the back off - Answered a. Until the desired setpoint is displayed or, press HOLD once to switch to button is pressed 8. Careful when touching the motor, as it can become overheated and burn your fingers the. Hold once to switch to and if a small cooling demand is (... Thermostat for 2Stage ( gas or electric ) heat/2-stage cool, nonheat,. S systems remove normal part of thermostat is in heat or off mode pressing... Note 2 stages of heat pump in the middle, move it to the correct temperature I... Or vice versa ; operator involvement is required odors in my home comfort and health reset your furnace... The next furnace activation and the events/temperature are set by the homeowner furnace blinks red repeatedly, you something... Found at the bottom of this page have a Lennox 51M37 thermostat, pressing the heat enables... The Cloudflare Ray ID found at the home screen oc-, curs as a result of a home. Button to display the minutes past the hour this page likely to cause miscommunication result. Icons in the system box ( see figure 2 ) with default settings as shown two types condensing! Reset your Lennox 51M37 thermostat these common issues you might encounter with your thermostat::!, nonheat pump, nonpower robbing applications ; am 6 '' flashes the water condenses a... The next furnace activation ): 6 minutes thermostat outward ( releasing the snaps ), then lift to. Cool mode is enabled when the heat pump heat and one stage of auxiliary ( or!