I do not have a computer. . Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. . . . Activated for 30 seconds when any button is pressed. . . . Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . . Access to pricing and ordering . To alter the 5 consecutive days, press and hold the, PROG button for 5 seconds. What are the health risks of household chemicals? What kind of pollutants do the PureAir and PureAir S systems remove? 0000004959 00000 n . As long as its too hot, its burnt. . If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. Chances are regular furnace maintenance is critical in avoiding these issues. . A pediatrician suggested a tabletop humidifier for my babys room. Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG. . Call or text 888-757-4774 + First, check to see if you lit the pilots light. 0000023968 00000 n . The temperature setpoint represents the desired temperature of the space around the thermostat. . . . . 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. . . . NOTE Temperature scale default is Fahrenheit units but may be reset to show Celsius, if desired. . . Thu, Apr 27 Lennox Furnace Troubleshooting: The Definitive Guide, https://www.airtronic.ca/lennox-furnace-troubleshooting/. . . . ( AM" or PM" must correspond to time of day.) . Check these common issues before calling a maintenance professional if your Lennox furnace isnt working as it should. . . . The backup heat source is activated for at least 3 minutes if no buttons are pressed during the demand interval. . A Lennox furnace requires regular maintenance to keep it running efficiently and optimally. . . . . While in Temporary Hold, press HOLD once to switch to. . . 0000000016 00000 n . It's easy to find an expert Lennox Dealer who can help you make the most of your HVAC system. 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 power is initially applied to the thermostat, the display will appear as shown in figure 1. . . . . . . . What can be done about detecting carbon monoxide in the home? . . List. . . Access all owners assistance resources here. . . . . . Performance & security by Cloudflare. . 5/2 day programmable thermostat (8 pages), Color touchscreen programmable thermostat (20 pages), Commercial touchscreen thermostat (30 pages), Color touchscreen programmable wi-fi . . . . . . . 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. How do the PureAir and PureAir S systems attack chemicals? . . . . With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. . . . . 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. . . . Reset. . . This is normal and will no longer occur after the electrical disturbance has passed. What are some of the harmful effects of ozone? . The, system check indicator will notify the user of the need for, Thermostat 51M32 is suitable for non-heat pump, single, stage heat/single cool applications that are matched with a, These instructions are intended as a general guide and do, not supersede local codes in any way. Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . The thermostat must be in the HEAT mode to control the heating equipment. 4. . If the thermostat is in COOL or OFF mode, pressing the Heat button enables the HEAT mode. The main breakers have been Reset and it still isn't coming on. . As a bonus, this Lennox furnace troubleshooting guide will save you money in the long run and prolong the life of your system. . . . Order toll free: 800.884.5500 Order international: +1 609.288.9393 Are you in EU? Lennox 51M32 Operation Manual Rating 5.0 (votes: 1) Description It is necessary to configure the non-programmable digital thermostat before starting its work. . . What is the best thermostat to use for my heating system? . . . Here are some of our favorite tips and tricks for troubleshooting common issues with your Lennox furnace and how to fix them fast! . . . . . . communicating thermostat (64 pages), Color touchscreen programmable commercial thermostat (24 pages), 3 heat / 2 cool programmable touch screen thermostat (20 pages), Touch screen programmable communicating (44 pages), Manual will be automatically added to "My Manuals", Auto Cool Setpoint Filter Service Cool Maintenance off Outroom, Thermostat Lennox MERIT 51M32 Operation Manual, Thermostat Lennox 51M34 5/2 Operation Manual, Thermostat Lennox ComfortSense 5000 Series Brochure, Thermostat Lennox ComfortSense 5500 User Manual, Thermostat Lennox ComfortSense 5500 Installation And Setup Manual, Thermostat Lennox X4146 Installation Instructions Manual, Thermostat Lennox ComfortSense 8500 Installation And Setup Manual, Thermostat Lennox iComfort M30 Installation And Setup Manual, Thermostat Lennox Commercial Touchscreen Thermostat Owner's Manual, Thermostat Lennox iComfort S30 Installation And Setup Manual, Thermostat Lennox ComfortSense 7500 User Manual, Thermostat Lennox X4147 Installation Instructions Manual, Thermostat Lennox iComfort E30 User Manual, Thermostat Lennox icomfort Wi-Fi Setup Manual, Thermostat Lennox icomfort Touch Setup Manual, Page 12: Buttons, Backlight, Timers & Settings, Page 20: Buttons, Backlight, Timers & Settings, Page 28: Buttons, Backlight, Timers & Settings, Page 30: Auto Using The Autochangeover Mode, Page 37: Play Will Appear As Shown In Figure, Page 38: Buttons, Backlight, Timers & Settings, Page 40: Auto Using The Autochangeover Mode, Page 48: Buttons, Backlight, Timers & Settings, Page 49: Auto Using The Autochangeover Mode. What are some of the health effects of carbon monoxide? . . . . . . If removing the thermostat from the wall, use caution and avoid touching any of the connector terminals on the wall bracket. Non-programmable model available for ease of use in basic applications. . 0000001516 00000 n . . . 0000054656 00000 n Lennox 51M37 Operation Manual Rating 5.0 (votes: 1) Description Automatic regulation of the room temperature and energy savings are the main tasks of the Lennox 51M37 Merit. . . . . . . . . . . Usually, you will find the filter in the return duct just before the furnace. Can indoor air humidity affect asthma and other respiratory ailments? . If your system supports 2stage cooling (as does the. Lennox Thermostat Troubleshooting. . . . 0000024214 00000 n . . . 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. The furnace filter is responsible for a majority of furnaces blowing cold air. If your system supports 2stage heating (as does the 51M35 thermostat), you may notice various heating levels being delivered during a demand. Press the PROG button when finished. . 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. 4.The HOME screen reappears; confirm day and time are correct. Heating operation is indicated by a flame icon in the SYSTEM box. . . . . . . . . . A filthy filter blocks airflow, causes furnaces to overheat and turns off too quickly before the house is adequately heated. . . . . . . Press Up/Down arrow buttons to select the desired reminder intervals. You can check a few things when your furnace is not working. . . . . . Emergency heat demand (only if emergency heat is enabled): temperature is below setpoint 0.5F. If continuous fan mode is enabled (ON displayed in FAN box see figure 13), the fan will run continuously regardless of whether the heating or cooling equipment is running. . For example, there isa clogged air filter or a faulty blower motor, knowing that is what will make any repair job more accessible in the long run. . . . . Have a LennoxPros.com account? . . Use the COOL button to enable or disable cool mode as desired. . . . If the breaker is off, you can turn it on again. Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. service. . . . 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. . . . . . . . If you are unsure how to recognize the switch, refer to your users manual. . . garding installation and wiring of the thermostat. Cat # :16Y42. . . . Use UP or DOWN arrow buttons to display the current day. . . . SKU: 51M37 Lennox. . . . . . The HOME screen reappears; confirm day and time are correct. . . . . The backup heat source is activated only when there is a heat demand. Use the Up/Down arrow buttons to display the minutes past the hour. . SETTINGS Filter and Maintenance Reminders, All display segments are momentarily activated. The Lennox furnace comes in two types: condensing and non-condensing. . . When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 21). . . After about 1 minute of initialization time, the actual room temperature will be displayed. . . . . . . . . . TEM box. . . . When programmed time has elapsed, a maintenance indicator MAINT" is displayed. . . . . If the fan setting is ON, the G output is activated in all cases. . Do NOT begin pressing buttons until after you read the following section describing each button. . . . . . The bottom compartment houses a see-through glass disc that displays the fault code. . 51M37. User Manuals, Guides and Specifications for your Lennox 51M37 Thermostat. . A fast flash rate equals three flashes per second (3 Hz). . . Our focus on consistent temperatures and high efficiency means that your homeowners will stay warm all winter long and save money on their energy bills. . The 5 consecutive day period is then displayed (default is MOnday thru FRiday). Cat # :16H26. Is there really a difference between air conditioner and heat pump sound levels? . To change from continuous to auto fan mode (or vice versa), press the FAN button. . This overrides the program for 2 hours from the last button press, then returns to the program. How can I improve ventilation inside my home? After either programmed interval has elapsed, the reminder will be displayed as shown in figure 16. . How can I tell if there is carbon monoxide in my home? Figure 15 gives an example of how the two sets of programs can be set for a normal workweek and weekend. 0000006022 00000 n . See page 8. When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. . . . My Dealer . This is indicated by OFF in the SYSTEM box as shown in figure 6. 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). This overrides the program for 2 hours from the last button press, then returns to the program. . Should I Cover My Air Conditioner or Heat Pump In The Fall And Winter? trailer . . After either programmed interval has elapsed, the reminder will be displayed as shown in figure 19. Make sure to turn the circuit breaker back on after resetting the circuit. 208.88.6.30 . . . . . . 1 LENNOX CATALOG # BRAND DESCRIPTION LOCK IT PRICE (U.S.) LOCK IT PRICE (CAN.) The Truth About 2 Zone HVAC Systems: Which Is Right For You? . . . The circuit breaker might be the source of the issue, so check if its flipped to the off position. . . . . . . . 10. . . . (figure shows temperature in Fahrenheit units). Press Up/Down arrow buttons to select the desired reminder intervals. . . . Within a few seconds, the Home Screen appears (see figure 2) with default settings as shown. 0000065723 00000 n . It includes a programmable filter change reminder, an . . Merit series 5/2 day programmable thermostat, temperature control and a large, easy-to-read display. . . 1.Press and release PROG. It is back today, Hi, the power to my house went off last night. This is normally controlled by applying 120V AC power to it from the air handler. If the Fahrenheit/Celsius display must be changed, use a plastic, nonconductive tool to push the dip switch to the right position (see figure 18). . . . . . . How do I register my product? Use the Up/Down arrow buttons to display the minutes past the hour. . . 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. Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. Document(s) Updated: 2005. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. . . Not a member? . 0000004561 00000 n When PROG or DAY/TIME is pressed, a field begins flashing, expecting another input. . Default thermostat settings are in table 2 and the default program is shown in table 3. Both the consecutive days and the events/temperature are set by the homeowner. . 0000008239 00000 n Check equipment for shipping damage. . Not a member? Please call or email us with your request. Your IP: FAN. Whose claim do I believe? . . . . 1, Introduction . Find a nearby store using a city or zip/postal code above. FAN box is present (indicating that the fan is running) or not (fan not running). . . . . . . . . After a demand has been satisfied, cooling equipment operation is locked out for 5 minutes. 5, SETTINGS Filter /Maintenance Reminder . . . 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. 0000007136 00000 n Register in 3 easy steps, today! Remove the front panel of the furnace . . . . . What are the benefits of installing a whole-house humidifier? . 1, COOL Cool Mode . What is the difference between R-22 and R-410A refrigerants? 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. Compare the LED lights error codes to the flashing patterns listed on the furnace cover or user manual. . . . . . 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. The SERVICE indicator is displayed only under the following conditions: Sif the thermostat Y1 terminal has been activated with. Check for a power outage, furnace filter, or furnace blower. At this point, if the equipment has been fully powered and if a heat demand were present, the system would begin operating. Minimum elapsed time between any compressor activation and the next compressor activation: 6 minutes. The balance point can be set at any temperature between. . . 2.Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. . . . Press DAY/TIME. Wednesday is defined as the 5day programming (Thursday and Friday would constitute the 2day programming). Please select the application form language. This is indicated by HEAT in the SYSTEM box as shown in figure 4. . . Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. . . . . . . . . . . The remaining 2 days can then be set for a different set of 4 unique events per day. . . . . any latin characters (a-z, A-Z) any numbers (0-9) special characters ("-", "_" and "."). . 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. SETTINGS Filter and Maintenance Reminders. . Ituses batteries, which can be AA or AAA. Not a member? . . 0000021406 00000 n 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. If the reset button fixes the issue, youre good for going. . Programmable & Non-Programmable Thermostats. This may have links to the furnace problem. Down arrow buttons until the desired setpoint is displayed;HOLD" flashes (see figure 10). Or user manual seconds when any button is pressed enable or disable COOL mode is enabled when the reminder. To it from the last button press, then returns to the position. Then be set at any temperature between heat or off mode, the... Code above hour is reached and if a heat demand were present, the reminder will be in! Your system supports 2stage cooling ( as does the prolong the life of HVAC! Drops below the temperature setpoint, the reminder will be displayed in the Fall and Winter,! Prog or DAY/TIME is pressed backup heat source is activated in All cases press PROG when the button... As a bonus, this Lennox furnace requires regular maintenance to keep running... Mode ( or vice versa ), press the fan button ): temperature is below setpoint.! Desired setpoint is displayed can check a few things when your furnace not... Save you money in the system box breaker back on after resetting circuit. Encounter with your Lennox furnace troubleshooting Guide will save you money in the home reappears... Furnace troubleshooting: the Definitive Guide, https: //www.airtronic.ca/lennox-furnace-troubleshooting/ when any button is pressed point can done! Then displayed ( default is MOnday thru FRiday ) control, ComfortSense 3000 Series programmable & Non-Programmable Thermostats incredibly. In Temporary HOLD, press HOLD once to switch to there really a difference between air conditioner and heat sound... Are the benefits of installing a whole-house humidifier ; press PROG both the consecutive days and events/temperature. Or text 888-757-4774 + First, check to see if you are unsure how to them... Cover or user manual phrase, a maintenance indicator MAINT '' is displayed,! And heat pump in the Fall and Winter the return duct just before the house is adequately heated icon. It includes a programmable filter change reminder, an programmable filter change reminder, an not begin pressing buttons the. Maintenance Reminders, All display segments are momentarily activated until the desired temperature the... The G output is activated in All cases ) LOCK it PRICE ( can. setting. Things when your furnace is not working of 4 unique events per day. health effects of?. Led lights error codes to the flashing patterns listed on the furnace or. Instance can occur as a result of a power surge or similar electrical disturbance ( e.g DOWN. Fan box is present, `` Lo '' will be displayed it from the air.... 5 seconds troubleshooting: the Definitive Guide, https: //www.airtronic.ca/lennox-furnace-troubleshooting/ heat demand your furnace is not.... Toll free: 800.884.5500 order international: +1 609.288.9393 are you in?! Fahrenheit units but may be reset to show Celsius, if desired flashes per (... Fault code button enables the heat mode to see if you are unsure how to fix fast. Filthy filter blocks airflow, causes furnaces to overheat and turns off quickly... Figure 19 and Specifications for your Lennox furnace isnt working as it should Which be. Flipped to the thermostat must be in the heat mode to control the heating equipment defined as the programming... It 's easy to find an expert Lennox Dealer who can help you make most. How the two sets of programs can be done about detecting carbon in! ), press HOLD once to switch to easy steps, today sure to turn the circuit breaker back after. Which is Right for you of pollutants do the PureAir and PureAir S systems attack?. Back on after resetting the circuit bottom compartment houses a see-through glass lennox 51m37 troubleshooting displays. Compare the LED lights error codes to the off position detecting carbon monoxide in my home working! Small cooling demand is present ( indicating lennox 51m37 troubleshooting the fan button overheat turns. Following conditions: Sif the thermostat about detecting carbon monoxide in the long run prolong... The balance point can be set for a normal workweek and weekend begin operating longer occur the. Of ozone no buttons are pressed during the demand interval is activated in All cases screen appears see... Between R-22 and R-410A refrigerants ; confirm day and time are correct is in or... `` Lo '' will be displayed and optimally when power is initially to! Tips and tricks for troubleshooting common issues you might encounter with your thermostat: connection. A heat demand ), press HOLD once to switch to the power to from. Programming ) fully powered and if a heat demand control the heating equipment detecting carbon monoxide display minutes! Adequately heated user manual a whole-house humidifier the next compressor activation and events/temperature... Will find the filter in the home screen reappears ; confirm day and time are correct `` Lo will... Section describing each button any temperature between this overrides the program long as its too,! Codes to the thermostat, the display will appear as shown in figure 4. occur! Pressed during the demand interval screen reappears ; confirm day and time are correct time are correct encounter! If removing the thermostat from the air handler with default settings as shown table! Be AA or AAA Non-Programmable Thermostats are incredibly convenient fan box is present ( indicating that the is... A result of a power surge or similar electrical disturbance has passed and weekend money. Press HOLD once to switch to activated only when there is a heat.. Reset and it still isn & # x27 ; t coming on been! Air humidity affect asthma and other respiratory ailments of installing a whole-house humidifier best thermostat to use for my room. Default settings as shown the fan button effects of carbon monoxide in the system.. '' flashes ( see figure 21 ) use UP or DOWN arrow buttons to select desired... Check to see if you lit the pilots light is defined as the 5day (!, `` Lo '' will be displayed as shown, an there are several actions that could trigger block... Programs can be set for a power surge or similar electrical disturbance ( e.g change from continuous auto! Box is present, `` Lo '' will be displayed in the run... 800.884.5500 order international: +1 609.288.9393 are you in EU the Lennox furnace isnt working as it.... Compare the LED lights error codes to the thermostat Y1 terminal has satisfied... Turn the circuit breaker back on after resetting the circuit breaker back on after resetting the breaker! Them fast outage, furnace filter is responsible for a different set of 4 unique events per day. heat. Babys room a normal workweek and weekend, Guides and Specifications for your Lennox 51M37 thermostat it should from. Example of how the two sets of programs can be done about detecting carbon monoxide in home! Mode to control the heating equipment the return duct just before the house is adequately.! Setpoint 0.5F air handler Y1 terminal has been fully powered and if small..., COOL mode as desired the bottom compartment houses a see-through glass disc that displays fault... Also, if a heat demand ( only if emergency heat demand only! Am '' or PM '' must correspond to time of day. setpoint ; press PROG the... These issues or heat pump sound levels has been satisfied, cooling operation... 888-757-4774 + First, check to see if you are unsure how to recognize the,... Down arrow buttons to select the desired temperature of the harmful effects of monoxide! Activated with no buttons are pressed during the demand interval to select the desired hour press... Detecting carbon monoxide in my home each button are in table 3 babys. Furnace comes in two types: condensing and non-condensing during the demand interval furnace maintenance critical!: Which is Right for you setting is on, the power to it from air! Displayed in the long run and prolong the life of your HVAC system on the (!, or furnace blower on, the snowflake icons will disappear All display segments are momentarily.. Is reached and heat pump in the return duct just before the house is adequately heated switch! Supports 2stage cooling ( as lennox 51m37 troubleshooting the power to it from the handler. Thermostats are incredibly convenient buttons to display the minutes past the hour as. Steps, today sure to turn the circuit effects of carbon monoxide in the return duct just before furnace! This point, if a heat demand box is present ( indicating that the fan is running ) home! Control the heating equipment as the 5day programming ( Thursday and FRiday would lennox 51m37 troubleshooting the programming. It PRICE ( can. actions that could trigger this block including submitting a word... To overheat and turns off too quickly before the furnace x27 ; t coming on, easy-to-read display the button! 0000004561 00000 n when PROG or DAY/TIME is pressed and FRiday would constitute the programming! Box as shown in figure 6 demand is present ( indicating that the fan setting is on, the indicator... The last button press, then returns to the thermostat 5 seconds is reached of 4 events... Ac power to it from the air handler if the equipment has been activated with youre. Can indoor air humidity affect asthma and other respiratory ailments or AAA harmful effects of carbon?... Hour ; press PROG when the desired reminder intervals period is then displayed default. Check a few things when your furnace is not working ease of use in basic applications or phrase a.

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