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. . . . . . . 2.Minutes will flash. . The balance point setting increases by 1F each time the Up button is pressed and decreases by 1F each time the Down button is pressed. Access to training . . . . Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. . . . Use the UP/DOWN arrow button to display the minutes past the hour. Electronic programmable thermostat for 2Stage (gas or electric) Heat/2-Stage Cool, nonheat pump, nonpower robbing applications. If continuous fan mode is enabled (ON displayed in FAN box see figure 16), the fan will run continuously regardless of whether the heating or cooling equipment is running. . See page 8. If SSR is disabled, the thermostat will react to a program event at the time the event occurs. . In some cases, it can be perilous if the problem is not properly addressed. It includes a programmable filter change reminder, an Programmable & Non-Programmable Thermostats. 0000053884 00000 n
Why can't I purchase Lennox products online? . . . . . . . 0000005623 00000 n
. . 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. The 51M37 thermostat is designed to remind you when the filter needs changing or when routine maintenance is required, as (and if) defined, by you. . Find a nearby store using a city or zip/postal code above. . . At this point, if the equipment has been fully powered and if a heat demand were present, the system would begin operating. . . . 51M35 Series Thermostat . Database contains 1 Lennox 51M37 Manuals (available for free online viewing or downloading in PDF): Operation manual . . . . 5/2 day programmable thermostat (8 pages), Color touchscreen programmable thermostat (20 pages), Commercial touchscreen thermostat (30 pages), Color touchscreen programmable wi-fi
How does excessive humidity affect my home comfort and health? . . 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. . . . . . . 51M35 thermostat), you may notice various cooling levels being delivered during a demand. . . . . . Press the DAY/TIME button and set the CURRENT hour, minute, and day of week as follows: 1.AM12" will flash on the screen. . Use the COOL button to enable or disable cool mode as desired. . . The backlight will turn off 15 seconds after the HOME screen reappears. . . . A fast flash rate equals three flashes per second (3 Hz). Cat # :16H26. If youre going to do your maintenance, the above guide is an excellent start since it can get you through most repairs. . 0000003152 00000 n
Vent pipes must be free of blockage. . . . At any time the program is running, from the HOME screen, set a temporary 2-hour hold by pressing the Up/. . (figure shows temperature in Fahrenheit units). . . . . . . 0000004826 00000 n
Each button press adjusts the setpoint up or down by 1 degree. . . . 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). . Use Up/Down arrow buttons to display the current day. . 0000005225 00000 n
FAN. . Press DAY/TIME. If youre anything like us, your home is your sanctuary. Also, is your air handler truly variable speed, or is it 3 speed (2 for cooling and 1 for dehumidification with AC -like my Lennox is - and they call it variable speed). . . . The default temperature setpoint in Hold mode is 70F. In emergency heat mode, only the backup heat source provides heat the heat pump is disabled. . . . . Programmable & Non-Programmable Thermostats. This is normal and will no longer occur after the electrical disturbance has passed. . . Press the PROG button when finished. . . . reset" the thermostat to its default condition. 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. . . 0000006298 00000 n
General These instructions are intended as a general guide and do In normal heat mode, both the heat pump and the backup heat source are used to provide heat. Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. . . . But with so many different variations of furnaces on the market today, its no wonder these devices can cause so much stress for homeowners. With a large HEAT demand, temperature is: less than setpoint 1.5F. . . . 6, Technical Specifications . The thermostat must be in either normal or emergency heat mode in order to properly control the heating equipment. . . . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. . . . . . . . 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2day program. The backup heat source is activated for at least 3 minutes if no buttons are pressed during the demand interval. . . . . . . . . . . . . . Introduction. . any latin characters (a-z, A-Z) any numbers (0-9) special characters ("-", "_" and "."). . . . What Lennox products are eligible for this 10-Year Extended Limited Warranty Program? 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. TEM box. It's easy to find an expert Lennox Dealer who can help you make the most of your HVAC system. . . . 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. . . . . Permanent Hold (HOLD displays solid; PROG not displayed); press HOLD again to return to the program (PROG displays; HOLD not displayed). Access all owners assistance resources here. . . . 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 . The RESET button is an unlabeled, recessed button located behind the door, on the righthand side of the thermostat, below the SETTINGS button (see figure 3). . . . . . . . . 0000007136 00000 n
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. . Each button press adjusts the setpoint up or down by 1 degree. . Study the operation manual, which consists of 6 pages in English. . . This document describes the operation of Lennox thermostat, 51M37. How do I know which indoor air quality product is right for me? . . . If the thermostat is in heat mode, pressing the Heat button disables HEAT mode (indicated by OFF in the SYSTEM box see figure 5). . . Not a member? 24VAC for at least 5 minutes, AND the L terminal is shorted to the R terminal; Sif the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the C terminal. Thermostat 51M35 is suitable for non-heat pump, twostage heat/two-stage cool applications using a gas or electric furnace. Make sure to suck the drain with a vacuum to unblock it. 0000007355 00000 n
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. . . . . Category: HVAC. NOTE Temperature scale default is Fahrenheit units but may be reset to show Celsius, if desired. . . Press DAY/TIME. 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. 4, PROG Thermostat Programming . If desired, start making changes within 15 seconds or the HOME screen will return. Depending on the furnace model, the panel may be in the side or bottom areas. . . If the Fahrenheit/Celsius display must be changed, use a. plastic, nonconductive tool to push the dip switch to the. . . . . . . . . . NOTE During an electrical storm or similar disturbance, the backlight may activate for a few seconds. . Check for a power outage, furnace filter, or furnace blower. . 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. . If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . 6, Thermostat RESET . . This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. All display segments are momentarily activated. . If you need a specific firmware or series relating to 51M37, we probably have it. A clogged drain may cause the furnace to stop working, as well as a short circuit in the circuit board, blower motor, poor air quality, and furnace rusting. . . Pivot the bottom of the thermostat outward (releasing the snaps), then lift up to remove. . . . . . The thermostat now functions much like a nonprogrammable thermostat. 0000003898 00000 n
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. NOTE Tables 2 and 3 on page 6 show all system and programming defaults. . . You can reset an electric furnace by locating the reset button (usually located inside the blower part) and pressing it down. Wiring Loose connections, disconnections, and faulty or aging wiring can cause a thermostat to lose its connection to their heating and cooling systems causing an interruption in service. When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. . . . . . . garding installation and wiring of the thermostat. Order toll free: 800.884.5500 Order international: +1 609.288.9393 Are you in EU? . Merit series 5/2 day programmable thermostat, temperature control and a large, easy-to-read display. . The 5 consecutive day period is then displayed (default is MOnday thru FRiday). . . When your furnace blinks red repeatedly, you know something is wrong. . . . . BillyHvac, Journeyman HVAC Tech. . . . . If the thermostat is in heat mode, pressing the Heat button enables EMG. . 208.88.6.30 . 3, HOLD Temperature Hold Mode . . . . . 4, FAN Controlling Fan Operation . . . Who do I contact if I have any questions? . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". 0000065723 00000 n
. . Sampling Method: temperature measurements sampled every 15 seconds. 1.Press and release PROG. . At any time the program is running, from the HOME screen, set a permanent hold (program override) by pressing the HOLD button (see figure 12). NOTE Tables 2 and 3 on page 8 show all system and programming defaults. 51M37 Merit Series. . . . . . . . I do not have a computer. . . 0000000016 00000 n
Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . . . . . When PROG or DAY/TIME is pressed, a field begins flashing, expecting another input. This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. . . . A pediatrician suggested a tabletop humidifier for my babys room. . You should change your furnace filters every two to three months. 1.AM12" will flash on the screen. . . Please select the application form language. . . . . The 51M37 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. . . . . . If your system supports 2stage cooling (as does the 51M37 thermostat), you may notice various cooling levels being delivered during a demand. NOTE Pressing ENTER during the following programming steps, saves and exits to the HOME screen. Cooling operation is indicated by flashing snowflake" icons in the SYSTEM box. Use the Up/Down arrow buttons to adjust the hold setpoint. 1, COOL Cool Mode . . To adjust the setpoint, press the UP or DOWN (YB) arrow buttons (see figure 9); the existing setpoint is displayed to the right of the actual room temperature. . PLUG IN (Use Care To Avoid Bending Prongs. . The 2day bar graph would support daylong occupancy and, because the first program begins later, a lessdemanding time schedule. . . . . The Lennox Merit Series 5/2 day programmable electronic thermostat 51M35 provides excellent temperature control and a large, easy-to-read display. Do I Qualify For The Extended Limited Warranty? The default setting for the reminders is OFF (disabled). . . . . . . . . . . . Then, turn the furnace switch back on. . . What do all those air conditioner and heat pump ratings mean? . . . . The following notes described terms used in the table. You can test the inducer motor by touching it. . . Reference: https://www.airtronic.ca/lennox-furnace-troubleshooting/. . cool applications using a gas or electric auxiliary heat. . Doing so could save you from spending unnecessary money on repairs or replacement: The furnaces top and bottom parts are accessible once you remove its front cover. . 0000004428 00000 n
Use the FAN button to select either continuous fan mode or auto fan mode. 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. 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. 0000016677 00000 n
Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. . . . . . 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. . Follow these steps to reset your Lennox furnace: The furnaces control panel will have a power switch on its side, which looks like a wall light switch. . . . . When the RESET button is pressed, ALL settings revert back to the defaults, including the default program (see tables 2 and 3). 51M37, 05/05, 505,050M. . . . . . . . . Who is responsible for making sure that my system is matched? Add to Cart. . 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. 0000006156 00000 n
grammable electronic thermostat that is easy-to-use and, has a large, easy-to-read display and excellent tempera-, ture control. . Conversely, if the balance point is 40F and the actual outdoor temperature is 45F, the outdoor temperature must drop to 37F before equipment adjustment occurs. . . 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. . . . . . ), Measurement Scale: Fahrenheit Measurement Range: 35F to 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F. . . Brand: Lennox SKU: 51M37 ( 1) Q&A: ( 0) - + $113.27 each ADD TO CART In Stock Get 6 Thu, Mar 2 Free Shipping This item ships free Easy Returns No restocking fee for 90 days Contact Question? . SETTINGS Filter and Maintenance Reminders. You want to relax and unwind in the comfort of your own space. . . 747 61
. . Use the COOL button to enable or disable cool mode as desired. . . How effective are Healthy Climate solutions, compared to room air filters? Enter in your new list name below, and we will save your item to it! This means that the temperature program data is ignored and the thermostat functions much like a nonprogrammable thermostat. . . . . . Lennox Residential has all the answers to your home heating and cooling, SunSource solar energy system, air conditioner and furnace questions. . Make sure to turn off the circuit breaker switch corresponding to the furnace. Heating operation is indicated by a flame icon in the SYS-. . . . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . . 0000021406 00000 n
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if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,100],'climesense_com-box-4','ezslot_6',112,'0','0'])};__ez_fad_position('div-gpt-ad-climesense_com-box-4-0');When the thermostat demands warmth, the inducer motor comes on to guarantee there are no restrictions on exhaust and intake vents. . . . . NOTE The balance point feature allows the outdoor temperature to rise or fall 3F above or below the balance point. . . What are the benefits of installing a whole-house humidifier? . . . . Non-programmable model available for ease of use in basic applications. . 0000054656 00000 n
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. . . . . . . . . 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 cool sleeping temperature. . . . Vacuuming the drain with a shop vacuum will remove any blockages. . . . . . . It includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service. . Consult authorities, Check equipment for shipping damage. . . . Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 minutes. . There is no setting or field repair for this. . A pressure switch that senses negative pressure in the vent shuts down the furnace. . 51M37. . 51M37 - Programmable Thermostat Lennox ComfortSense 3000 Touchscreen MERIT Thermostat 5/2 Programmable ComfortSense 3000 Series Programmable & Non-Programmable Thermostats Accurate temperature contr. . . . When power is initially applied to the thermostat, the dis-. . . . What are the health benefits of a fresh-smelling home? . . . . Sorry. The default setting for the reminders is OFF (disabled). . . . . The inducer motor of your furnace expels flue gases from your home when its operating, and if it breaks down, so does the furnace. . . Adjusting Temperature Setpoint in Hold Mode. Press Up/Down arrow buttons to select the desired reminder intervals. . . This may have links to the furnace problem. Today I went to activate the touchscreen to adjust temperature, and the screen is dark . Do NOT begin pressing buttons until after you read the following section describing each button. . . . . . . . . You can check a few things when your furnace is not working. . . . . 0000004694 00000 n
. . . . . 7, Default Thermostat Settings . . . . Troubleshooting. . Figure 15 gives an example of how the two sets of programs can be set for a normal workweek and weekend. . . Refer to the installation manual for instructions re-. 2.Minutes will flash. . If you find any, ThisdocumentdescribestheoperationofLennoxthermostat, When power is initially applied to the thermostat,thedis-, All display segmentsaremomentarily activated. . . . . Enter in your new list name below, and we will save your item to it! When power is initially applied to the thermostat, the dis-. . . The thermostat also includes a programmable, filter change reminder and a system check indicator. . . . . . How do I register my product? . Category 4 furnaces, also known as condensing furnaces, are the most efficient models. . . . You can email the site owner to let them know you were blocked. . . . %%EOF
. . . Also when I snapped the new one in will everything just start up image.jpg 749 0 obj<>stream
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. . . . . 3.Day MO" (Monday) will flash. . . . 3.Use the Up/Down arrow buttons to select the desired minute; press PROG. . . . . . . The 51M37 is suitable for heat pump, 3-stage heat/2-stage. 0000001516 00000 n
Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . . . . . If the breaker is off, you can turn it on again. . . . When programmed time has elapsed, a FILTER indicator is displayed. . . . . . . How can I tell if I have a ventilation problem? . . When an Arrow, HOLD, HEAT, or COOL button is pressed. After about 1 minute of initialization time, the actual room temperature will be displayed. . . . Settings of Off, 1, 3, 6 or 12 (months of fan run time) are available. Someone has cracked a damaged ceramic insulator on a flame sensing rod. After either programmed interval has elapsed, the reminder will be displayed as shown in figure 16. . . . The HOME screen reappears; confirm day and time are correct. prongs. In this case, you may need to check the circuit breaker or the fuse box. . Your Location: Find a Dealer. . It includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service. . . Under some abnormal conditions, it may be necessary to. after an electrical storm or power outage). . Check equipment for shipping damage. . . . The bottom compartment houses a see-through glass disc that displays the fault code. (indicated by HEAT in the SYSTEM box see figure 4). . . garding installation and wiring of the thermostat. How does that compare to a whole-home humidifier? . Check these common issues before calling a maintenance professional if your Lennox furnace isnt working as it should. Minutes will flash. . 6, SETTINGS Filter and Maintenance Reminders . A filthy filter blocks airflow, causes furnaces to overheat and turns off too quickly before the house is adequately heated. . 3.Day MO" (Monday) will flash. . . . . . . 10. If the fan setting is ON, the G output is activated in all cases, 30 minutes (when upstaging from small to large demand), 15 minutes (HEAT MODE ONLY when upstaging from large to very large demand). . Access to pricing and ordering . . . . If your system supports 3stage heating (as does the 51M37 thermostat), you may notice various heating levels being delivered during a demand. . 5, PROG Thermostat Programming . . 2, DAY/TIME Set Day and Time . What products are NOT covered under warranty? * For most applications, E will be jumpered to W1. . . . . . . . . . . This document describes the operation of Lennox thermostat. Of a power surge or similar electrical disturbance ( e.g your maintenance, the above guide is an excellent since... Can I tell if I have any questions issues you might encounter with your thermostat: Wi-Fi problem! Temperature drops below the balance point feature allows the outdoor temperature to rise or fall above! Vent pipes must be free of blockage equipment has been turned off 00000... Gives an example of how the two sets of programs can be perilous if the is. May notice various cooling levels being delivered during a demand SSR is disabled has... Store using a city or zip/postal code above temperature scale default is Fahrenheit units lennox 51m37 troubleshooting. Press PROG normal and will no longer occur after the HOME screen, a! An instance can occur as a result of a fresh-smelling HOME any, ThisdocumentdescribestheoperationofLennoxthermostat, when power is initially to... Operation of Lennox thermostat, the snowflake icons will disappear default temperature setpoint in hold is. Ease of use in basic applications pressed, a filter indicator is displayed 99F Measurement Resolution: Measurement. The cool button is pressed, a filter indicator is displayed Lennox Residential has all the to..., we probably have it field repair for this 10-Year Extended Limited Warranty program it 's easy to find expert... Of how the two sets of programs can be perilous if the is! Thermostat must be in either normal or emergency heat mode, cool is... New list name below, and dualfuel compatibility find any, ThisdocumentdescribestheoperationofLennoxthermostat, when power initially... The site owner to let them know you were blocked ( gas or electric ) cool... Disturbance ( e.g Accuracy: +/1F to it by 1 degree auto fan mode them know you were.. Furnaces, also known as condensing furnaces, also known as condensing furnaces, are the health of! Ca n't I purchase Lennox products online an instance can occur as a result of a fresh-smelling?. Anything like us, your HOME is your sanctuary there is no setting or field repair this! Electric auxiliary heat lockout, balance point feature allows the outdoor temperature sensor provides auxiliary heat expecting... Youre anything like us, your HOME heating and cooling, SunSource energy... Bottom of the thermostat, the snowflake icons will disappear n lennox 51m37 troubleshooting issues! Electric auxiliary heat vacuuming the drain with a vacuum to unblock it the inducer motor by touching it mode. Heat/Two-Stage cool applications using a gas or electric auxiliary heat lockout, balance point suck the drain with a vacuum. Change reminder and a large, easy-to-read display system is matched the system would operating... To enable or disable cool mode is 70F is matched on a flame sensing rod known condensing. Side or bottom areas lennox 51m37 troubleshooting system and programming defaults thermostat will react to a program at! Includes a programmable, filter change reminder and a large heat demand, control. Encounter with your thermostat: Wi-Fi connection problem segmentsaremomentarily activated by touching it the cooling equipment has been off. Those air conditioner and furnace questions note temperature scale default is MOnday thru FRiday ), C and. Been turned off of programs can be perilous if the thermostat now functions much like a nonprogrammable thermostat minute! ( available for ease of use in basic applications 51M37, we probably have it time elapsed... Or similar disturbance, the dis- system check indicator pump, 3-stage.... Vacuum will remove any blockages thermostat: Wi-Fi connection problem surge or similar electrical disturbance ( e.g firmware! When the cool button to enable or disable cool mode is enabled when the cool button to enable or cool... Toll free: 800.884.5500 order international: +1 609.288.9393 are you in EU and heat pump is.! Down the furnace model, the above guide is an excellent start since it can get you through most.... Shuts down the furnace pressed during the following section describing each button press adjusts setpoint... 800.884.5500 order international: +1 609.288.9393 are you in EU the backup source... Temperature scale default is Fahrenheit units but may be reset to show,... Lift up to remove available for ease of use in basic applications, your HOME is your.! Programmable filter change reminder, an programmable & amp ; Non-Programmable Thermostats for a few things your. Switch that senses negative pressure in the system box thermostat that is easy-to-use and, the... Has passed programmable & amp ; Non-Programmable Thermostats will react to a program event at the time event... Off 15 seconds after the HOME screen reappears will return 2 through for... Select the desired reminder intervals know something is wrong a demand the backup source! To let them know you were blocked heat/two-stage cool applications using a city or zip/postal code above programmable! Result of a fresh-smelling HOME ceramic insulator on a flame icon in the side or bottom areas,... May notice various cooling levels being delivered during a demand your HVAC system E will be as! Furnace blower manual, which consists of 6 pages in English there is no setting field... Firmware or series relating to 51M37, we probably have it is adequately heated 1 degree is.... Temperature is: less than setpoint 1.5F point feature allows the outdoor sensor... How do I know which indoor air quality product is right for me following notes described terms in... Breaker or the HOME screen reappears ; confirm day and time are correct is 70F in heat or off,... Robbing applications if desired, start making changes within 15 seconds after the electrical disturbance (.! The circuit breaker switch corresponding to the furnace current day if I have a ventilation lennox 51m37 troubleshooting steps 1 through for... Breaker or the HOME screen thermostat Lennox ComfortSense 3000 series programmable & amp ; Thermostats! On a flame icon in the SYS- programmed time has elapsed, a filter indicator is displayed Non-Programmable! That senses negative pressure in the table demand is present, `` ''... In either normal or emergency heat mode, cool mode as desired powered and if a heat demand present. 2Day program an instance can occur as a result of a fresh-smelling HOME flashing snowflake '' icons in SYS-! It down the actual room temperature will be displayed '' will be as. Demand has been turned off, then lift up to remove Extended Limited Warranty program press! Are the benefits of installing a whole-house humidifier order toll free: 800.884.5500 order international: +1 609.288.9393 you! During the demand interval the Up/ actual temperature drops below the balance point feature allows the outdoor temperature provides... The table 4 for periods B, C, and we will save your item to it quality product right. Disturbance has passed, furnace filter, or cool button to display the current day may need to the..., a filter indicator is displayed before calling a maintenance professional if your Lennox furnace isnt as... Thermostats Accurate temperature contr is indicated by a flame icon in the table the! Breaker switch corresponding to the thermostat, temperature is: less than setpoint 1.5F but may be necessary to free... Do not begin pressing buttons until after you read the following notes described terms used in the box. To adjust the hold setpoint and excellent tempera-, ture control what Lennox online. Something is wrong encounter with your thermostat: Wi-Fi connection problem in cases! Measurements sampled every 15 seconds or the HOME screen will return to remove two to three months a begins... Panel may be reset to show Celsius, if the breaker is off, you may need check! Making changes within 15 seconds or the HOME screen 3 on page 6 show all system programming! `` Lo '' will be displayed in the system box balance point feature allows the outdoor temperature to or... The 51M37 is suitable for heat pump, twostage heat/two-stage cool applications using a or... Available for ease of use in basic applications below, and the next furnace activation and screen! Order international: +1 609.288.9393 are you in EU: +1 609.288.9393 you... ; press PROG usually located inside the blower part ) and pressing it down Lennox products are eligible this. If the thermostat, the panel may be reset to show Celsius, if desired, start making within. Then lift up to remove press adjusts the setpoint up or down by 1 degree youre to... Note the balance point operation, and dualfuel compatibility connection problem 51M35 thermostat ), you can check a things. The reminders is off ( disabled ) make sure to suck the with! 6 minutes for a few seconds disc that displays the fault code per (! ): 6 minutes fresh-smelling HOME can test the inducer motor by touching it for a normal and... Your Lennox furnace isnt working as it should do all those air conditioner and furnace questions programmable! Air conditioner and heat pump ratings mean heat/two-stage cool applications using a gas or electric furnace if desired in applications. Emergency heat mode, only the backup heat lennox 51m37 troubleshooting provides heat the heat pump is disabled is 70F and! Working as it should the 2day bar graph would support daylong occupancy and, because first... Following programming steps, saves and exits to the thermostat must be of! Before calling a maintenance professional if your Lennox furnace isnt working as it should thermostat functions much like nonprogrammable... Furnace filter, or furnace blower is then displayed ( default is MOnday thru FRiday ) drops below temperature... Heating demand has been fully powered and if a heat demand, temperature control and a large, easy-to-read.. Health benefits of installing a whole-house humidifier optional outdoor temperature sensor provides auxiliary heat lockout, balance operation! In emergency heat mode, only the backup heat source provides heat the heat pump, robbing! Viewing or downloading in PDF ): operation manual, which consists of 6 pages in English (..
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