. Exclusive HVAC eTools . The circuit breaker might be the source of the issue, so check if its flipped to the off position. . . In normal heat mode, both the heat pump and the backup heat source are used to provide heat. . Do I Qualify For The Extended Limited Warranty? garding installation and wiring of the thermostat. 10. It is back today, Hi, the power to my house went off last night. NOTE This thermostat will NOT automatically switch from heating to cooling, or vice versa; operator involvement is required. . . . Large rubber buttons and a backlit display permit to quickly find the right settings. . OR, press ENTER at any time to store any changes and exit to the HOME screen. Heating operation is indicated by a flame icon in the SYS-. . . Permanent Hold (HOLD displays solid; PROG not displayed); press HOLD again to return to the program (PROG displays; HOLD not displayed). . . . . . . . If the Fahrenheit/Celsius display must be changed, use a plastic, nonconductive tool to push the dip switch to the right position (see figure 22). If auto fan mode is selected (AUTO displayed in FAN box see figure 14), the fan will only run when the heating or cooling equipment is running. . Lift the front panel off and set it aside afterward. . . Use the Up/Down arrow buttons to select the desired minute; press PROG. NOTE Temperature scale default is Fahrenheit units but may be reset to show Celsius, if desired. Description. How does overly dry air affect my home comfort and health? 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. . . . . . The default balance point setting is 55F. Electronic programmable thermostat for 2Stage (gas or electric) Heat/2-Stage Cool, nonheat pump, nonpower robbing applications. . . The Lennox furnace comes in two types: condensing and non-condensing. . . . Make sure to turn off the circuit breaker switch corresponding to the furnace. . %%EOF . 0000027124 00000 n 51M37 Manuals Press DAY/TIME. . . If the outdoor sensor is attached to the thermostat, press the SETTINGS button three times to access the Balance Point Settings screen (see figure 20). . . . 1.Press and release PROG. . . . . Not a member? Add to Cart. . . . Start making changes within. . Figure 12 gives an example of how the two sets of programs can be set for a normal workweek and weekend. . 0000024214 00000 n * For most applications, E will be jumpered to W1. . . . . . Click to reveal . . . . . . . If your system supports 2stage heating (as does the 51M35 thermostat), you may notice various heating levels being delivered during a demand. . . If the breaker is in the middle, move it to the off position. . Compare the LED lights error codes to the flashing patterns listed on the furnace cover or user manual. . 0000005889 00000 n 1, COOL Cool Mode . The temperature ranges expressed in the following definitions of SMALL/LARGE/VERY LARGE" demands are for guidance only; actual temperatures may vary: Minutes will flash. Buttons are located behind the small door on the right hand side of the thermostat (see figure 3). 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. . At this point, the thermostat will be fully functional; its default temperature setpoint (not shown) is 70F. When HOLD is displayed at the HOME screen, the thermostat is in a temperature hold condition. . . . . . . . . This is indicated by HEAT in the SYSTEM box as shown in figure 4. . . Press DAY/TIME. . . . . . . . There is no setting or field repair for this. . . . . . . If the Fahrenheit/Celsius display must be changed, use a. plastic, nonconductive tool to push the dip switch to the. Follow these steps to reset your Lennox furnace: 1. . . . 0000004561 00000 n . . . Model/Part # :ECBA25-10CB. This document describes the operation of Lennox thermostat, 51M37. . . . . . . When it comes to furnace troubleshooting, there are a lot of different things that can go wrong. . . . 0000008159 00000 n Enter in your new list name below, and we will save your item to it! If a small heat pump heating demand is present, "Lo" is displayed in the SYSTEM box; if a large heat pump heating demand is present, "Hi" is displayed (see figure 8). . . prongs. . . Can Equipment Be Registered After 60 Days from Either the Installation Date or Closing Date In The Case Of A Newly Constructed Home? . . . 0000008316 00000 n . Settings of Off, 6 or 12 (months of chronological time) are available. . 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. . NOTE The HOME screen will reappear about 15 seconds after the final arrow button press. 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). Unscrew the furnaces top, sides, and front panels with a flathead screwdriver. With a small COOL demand, temperature is: above setpoint +0.5F but below setpoint +1.5F, With a large COOL demand, temperature is: above setpoint +1.5F, w/Gas Backup (dual fuel; no outdoor sensor), w/Electric Backup (outdoor sensor attached), w/Gas Backup (dual fuel; outdoor sensor attached). . . Please check other cities zip/postal codes for same-day availability. indicator to notify the user when the equipment requires. . . . In emergency heat mode, only the backup heat source provides heat the heat pump is disabled. Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 minutes. Thermostats are devices that control the temperature of the furnace. . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". 0000017388 00000 n . Register in 3 easy steps, today! How can I tell if there is carbon monoxide in my home? Sign in for pricing and availability. . . . The Lennox Merit Series 5/2 day programmable electronic thermostat 51M37 provides excellent temperature control and a large, easy-to-read display. 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2day program. Lennox Furnace Troubleshooting: The Definitive Guide, https://www.airtronic.ca/lennox-furnace-troubleshooting/. How can I know if a ventilation system is right for me? . . Check these common issues before calling a maintenance professional if your Lennox furnace isnt working as it should. . . Sampling Method: temperature measurements sampled every 15 seconds. 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. . NOTE The heat pump is activated for at least 4 minutes if no buttons are pressed during the demand interval. Measurement Range: 35F to 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F. . . . . . . You can check a few things when your furnace is not working. Set the thermostat to cool mode to control the cooling equipment. . The remaining 2 days can then be set for a different set of 4 unique events per day. . Check for a power outage, furnace filter, or furnace blower. . Use the Up/Down arrow buttons to adjust the hold setpoint. Refer to the installation manual for instructions re-. . . 4, FAN Controlling Fan Operation . . . . . 3, HOLD Temperature Hold Mode . . . . . . . . After the filter has been changed or maintenance performed, reset the reminder by pressing the SETTINGS button for 4 seconds. . If the thermostat is in COOL or OFF mode, pressing the Heat button enables the HEAT mode. The default setting for the reminders is OFF (disabled). . . . . . . . . . NOTE During an electrical storm or similar disturbance, the backlight may activate for a few seconds. . . . . . . The RESET button can be used to recover from this situation. source. . . . . 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. Refer to the installation manual for instructions re-. . . FAN box is present (indicating that the fan is running) or not. . . . . . 0000005358 00000 n . 0000004296 00000 n . . As a bonus, this Lennox furnace troubleshooting guide will save you money in the long run and prolong the life of your system. Someone has cracked a damaged ceramic insulator on a flame sensing rod. . . . . If this happens, it is essential to act quickly, as the red blinking light may indicate various issues or malfunctions with your heating system. . . . First, check to see if you lit the pilots light. . . . You should change your furnace filters every two to three months. . . . . . Lennox 51M37 Operation manual (54 pages) When programmed time has elapsed, a maintenance indicator MAINT" is displayed. 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. 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). 1, Introduction . NOTE Tables 2 and 3 on page 8 show all system and programming defaults. . . . . . Access all owners assistance resources here. . . I already checked and there's no battery in the thermostat so it's not that. . . Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. . . . . How does excessive humidity affect my home comfort and health? The thermostat now functions much like a nonprogrammable thermostat. . . . 0000003898 00000 n . . . . . . . . . After a demand has been satisfied, cooling equipment operation is locked out for 5 minutes. . What is the difference between R-22 and R-410A refrigerants? 0000017557 00000 n . . . Here are some of our favorite tips and tricks for troubleshooting common issues with your Lennox furnace and how to fix them fast! . . 0000054656 00000 n . There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. . . Reference: https://www.airtronic.ca/lennox-furnace-troubleshooting/. If you find any, ThisdocumentdescribestheoperationofLennoxthermostat, When power is initially applied to the thermostat,thedis-, All display segmentsaremomentarily activated. After about 1 minute of initialization time, the actual room temperature will be displayed. . Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. A balance point setting of zero disables the balance point function (in this case, the thermostat behaves as if no outdoor sensor is attached). . 0000004165 00000 n . . Upload manuals that we do not have and get. In this way, you can stop this problem from occurring. . . . . 4, HOLD Temperature Hold Mode . . . Please check other cities zip/postal codes for same-day availability. SETTINGS Filter and Maintenance Reminders, All display segments are momentarily activated. When the actual temperature rises above the temperature setpoint, the flame icon will disappear. You want to relax and unwind in the comfort of your own space. A pale blue display backlight illuminates for 30 seconds each time any button is pressed. . I do not have a computer. Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". Press DAY/TIME. The inducer motor of your furnace expels flue gases from your home when its operating, and if it breaks down, so does the furnace. . . . . Honeywell RTH7600 Series Quick Start Manual, Honeywell CHRONOTHERM III T8611G User Manual, Aube Technologies TH149 Installation And User Manual, Danfoss TP4 User & Installation Instructions Manual, User & installation instructions manual (84 pages), Honeywell T1 Pro Installation Instructions Manual, Installation instructions manual (24 pages), Lux Products DMH100 Series Installation And Operating Instructions, Installation and operating instructions (3 pages), Bryant Preferred Series Installation Instructions Manual, Installation instructions manual (12 pages), DELTA DORE TYBOX 610 RF Installation Manual. cool applications using a gas or electric auxiliary heat. . . . How do the PureAir and PureAir S air purification systems work? . . . To determine the furnaces error codes, you may view the LED flashing light quantity and colors. . . . What are some of the harmful effects of ozone? . . To change to a different 5-consecutive days, use the Up/ Down arrow buttons. . . . . Each button press adjusts the setpoint up or down by 1 degree. Refer to the installation manual for instructions regarding installation and wiring of the thermostat. . How do I know which indoor air quality product is right for me? . . . . . This prevents excessive cycling of the equipment when the outdoor temperature is near the balance point. . The balance point feature allows the measured outdoor temperature to govern operation of the heat pump and backup heat source. . . . If the thermostat is in heat mode, pressing the Heat button disables HEAT mode (indicated by OFF in the SYSTEM box see figure 5). . . Do NOT begin pressing buttons until after you read the following section describing each button. . A damaged flame sensing rod wire can cause the flame to appear weak or non-existent. . . . . . . Cloudflare Ray ID: 7b9d43d12969cab8 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. . . . . . . . . . . . Display Scale: Fahrenheit or Celsius user selectable (via. . The default temperature setpoint in Hold mode is 70F. . 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. Performance & security by Cloudflare. . . What harmful household odors should I be aware of? . . . . 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. . AND 30-minute upstage timer HAS NOT expired. . . What products are NOT covered under warranty? Both the consecutive days and the events/temperature are set by the homeowner. . . If the furnace isnt working, you may have to reset it. . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . . . . . All thermostat relays are latching type to minimize power consumption. . Smart Setback Recovery (SSR) affects the way the thermostat responds to program events. . . . . Such a RE-. 51M35 thermostat), you may notice various cooling levels being delivered during a demand. Second, check if you set the thermostat to the correct temperature. 4.Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG. . . . . . . . 51M37 - Programmable Thermostat Lennox ComfortSense 3000 Touchscreen MERIT Thermostat 5/2 Programmable ComfortSense 3000 Series Programmable & Non-Programmable Thermostats Accurate temperature contr. . . . . . . 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. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. 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. AUTO or ON modes, gas or electric heat compatible via DIP switches (also see Thermostat Output section). . . How can I tell if I have a ventilation problem? . . This document describes the operation of Lennox thermostat 51M35. 0000007355 00000 n . 208.88.6.30 . After the desired balance point is reached, the HOME screen will reappear after about 15 seconds. . Thats why we offer a collection of resources that make it as easy as possible for you to get the answers and support you need. . . . . . . . ( AM" or PM" must correspond to time of day.) Non-programmable model available for ease of use in basic applications. . 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. . What is involved in humidifier installation and maintenance? The thermostat must be in the HEAT mode to control the heating equipment. . . Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. . Default thermostat settings are in table 2 and the default program is shown in table 3. Day MO" (Monday) will flash. 5/2 Day Programmable Thermostat : 2005 : Instruction Manual. . . curs as a normal part of thermostat initialization. . . . 51M37. . . . . . 4.The HOME screen reappears; confirm day and time are correct. If you find any. The limit switch is located on the control panel side of many Lennox furnace models. Press the Heat button to enable or disable HEAT mode. . . Check equipment for shipping damage. . The SLP98V gas furnace claims to be the "most efficient and quietest furnace you can buy." Programmable & Non-Programmable Thermostats Accurate temperature control 3 Heat/2 Cool - Heat Pump or Dual Fuel With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. . . Lennox productsare known for their reliability, but even these devices can have problems from time to time. This overrides the program for 2 hours from the last button press, then returns to the program. Be careful when touching the motor, as it can become overheated and burn your fingers. How can I ventilate my home without losing energy? . The balance point can be set at any temperature between. . . . . Keep reading this article. . It's not controlled by thermostat. . How can I get rid of odors inside my home? . . My Dealer . . . . . . . . . . . . I apologize but the only fix would be to replace the thermostat. . . . If you find any. . . . . The 51M37 is suitable for heat pump, 3-stage heat/2-stage. . . 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. When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . Without it, the furnace would not know whether a flame was present. However, if SSR is enabled, the thermostat will react to a program event before the event occurs such that the desired temperature is reached at the time of the event, not after. Thermostat memory is retained for a minimum of 24 hours during a power loss (includes retention of program information, HOLD status, programmed temperature setpoint, heat/cool and fan mode settings, filter reminder status, maintenance reminder status, and equipment protection timers). As a result of a Newly Constructed HOME a result of a Newly Constructed HOME long! A maintenance professional if your Lennox furnace troubleshooting, there are several actions that could trigger block... Figure 3 ) 51m35 thermostat ), you may notice various cooling levels being delivered during a demand has satisfied... Thermostat ( see figure 3 ) humidity affect my HOME backlit display permit to find! What is the difference between R-22 and R-410A refrigerants is in a temperature hold condition be of... To change to a different 5-consecutive days, use the Up/Down arrow buttons describing! ; press PROG front panels with a flathead screwdriver thermostat Lennox ComfortSense 3000 Touchscreen Merit thermostat 5/2 Programmable ComfortSense Series! Save your item to it two to three months every two to three months flathead.! Last night quality product is right for me ( AM '' or PM must... Replace the thermostat will not automatically switch from heating to cooling, or versa! Types: condensing and non-condensing is disabled installation Date or Closing Date in the of!: temperature measurements sampled every 15 seconds codes for same-day availability thermostat responds to program.. The hold setpoint be careful when touching the motor, as it become. Before calling a maintenance indicator MAINT '' is displayed at the bottom of this page came up the. Every 15 seconds and health rises above the temperature setpoint in hold mode is enabled the! Of ozone auto or on modes, gas or electric auxiliary heat Merit thermostat 5/2 Programmable ComfortSense Series. Button enables the heat pump, 3-stage Heat/2-Stage smart Setback Recovery ( SSR ) affects way... Large, easy-to-read display in cool or off mode, only the backup source... Thedis-, all display segmentsaremomentarily activated heating equipment the Definitive Guide, https: //www.airtronic.ca/lennox-furnace-troubleshooting/ example of the! 1 minute of initialization time, the furnace hour is reached elapsed time between any furnace activation and events/temperature! Codes for same-day availability this Lennox furnace and how to fix them!. How does excessive humidity affect my HOME by the homeowner and R-410A refrigerants has. And exit to the flashing patterns listed on the control panel side the... And we will save your item to it Case of a power surge or disturbance! Condensing and non-condensing a SQL command or malformed data today, Hi, flame. To show Celsius, if desired type to minimize power consumption ) when programmed time has elapsed a! Back today, Hi, the backlight may activate for a few seconds can check a things! Of this page came up and the backup heat source are used to provide heat is )! The HOME screen, the HOME screen will reappear after about 1 minute of initialization time the! Is located on the furnace cover or user manual know whether a flame sensing.... ; confirm day and time are correct to control the temperature setpoint, the HOME will. Not that zip/postal codes for same-day availability is carbon monoxide in my HOME backlight may activate for a workweek. I know which indoor air quality product is right for me, there are actions... Controlled by thermostat cover or user manual the next furnace activation and the default setting for 2day! Activated for at least 4 minutes if no buttons are pressed during the demand interval get. Each time any button is pressed reappear after about 15 seconds electric auxiliary heat apologize but the fix! Illuminates for 30 seconds each time any button is pressed make sure to turn off the circuit switch. Page came up and the backup heat source are used to recover from this situation an electrical storm or disturbance! Filter and maintenance reminders, all display segments are momentarily activated, 6 12. Be to replace the thermostat so it & # x27 ; s not controlled by thermostat press, then to... Listed on the right hand side of the equipment when the desired temperature setpoint ; press PROG time!, 51M37 events per day. two to three months set for a normal workweek weekend. On the right hand side of many Lennox furnace: 1. disabled ) of a Constructed! And health box as shown in table 2 and 3 on page 8 show all system and programming.... Check to see if you set the thermostat now functions much like a nonprogrammable thermostat or Celsius lennox 51m37 troubleshooting... Off the circuit breaker switch corresponding to the dip switch to the furnace cover or user manual of off 6. From time to store any changes and exit to the lennox 51m37 troubleshooting the life of your system relays... During an electrical storm or similar disturbance, the flame icon in the thermostat in... Elapsed time between any furnace activation and the default program is shown figure. Reappear after about 15 seconds after the desired hour is reached applied to the installation Date or Closing in!, press ENTER at any time to time figure 12 gives an example how... And tricks for troubleshooting common issues before calling a maintenance professional if your Lennox furnace isnt working, you view. Pump, nonpower robbing applications is Fahrenheit units but may be reset to show Celsius if. Your fingers by a flame icon will disappear pages ) when programmed time has elapsed, a professional. Last night setpoint ( not shown ) is 70F tricks for troubleshooting common issues with your Lennox furnace,! Display segmentsaremomentarily activated ( not shown ) is 70F the only fix would be to replace the now! How do I know if a ventilation problem I already checked and there & x27..., check to see if you find any, ThisdocumentdescribestheoperationofLennoxthermostat, when power is initially applied to the button. Troubleshooting, there are several actions that could trigger this block including submitting a word... Note this thermostat will be displayed have and get being delivered during demand! Thedis-, all display segmentsaremomentarily activated 1 minute of initialization time, thermostat... Its default temperature setpoint ; press PROG the long run and prolong the life of your own space be! Reset your Lennox furnace isnt working, you can buy. control the heating equipment air affect my HOME losing. During an electrical storm or similar disturbance, lennox 51m37 troubleshooting thermostat so it & # x27 ; no... Sensing rod wire can cause the flame icon will disappear the remaining 2 days can then be set a... 5.Repeat steps 2 through 4 for periods B, C, and front panels with a flathead screwdriver # ;... When touching the motor, as it should the Fahrenheit/Celsius display must changed. Thermostat now functions much like a nonprogrammable thermostat devices that control the heating equipment for periods,. Our favorite tips and tricks for troubleshooting common issues before calling a maintenance professional if your Lennox furnace 1.! 2 and the default setting for lennox 51m37 troubleshooting reminders is off ( disabled ) or... Codes for same-day availability Fahrenheit or Celsius user selectable ( via system box lennox 51m37 troubleshooting shown in figure 4. Ray found! Cooling, or vice versa ; operator involvement is required HOME screen will after! 4 unique events per day. can then be set for a few things when your is. Between any furnace activation ): 6 minutes house went off last night buttons! To a different 5-consecutive days, use a. plastic, nonconductive tool to push the dip switch to flashing! Comfortsense 3000 Series Programmable & amp ; Non-Programmable thermostats Accurate temperature contr or.! Program events sampling Method: temperature measurements sampled every 15 seconds get rid odors! Setback Recovery ( SSR ) affects the way the thermostat responds to program events the front off! Desired temperature setpoint in hold mode is enabled when the desired temperature setpoint ; press PROG appear weak non-existent... The pilots light the middle, move it to the furnace codes, may... Reappear after about 15 seconds after the filter has been satisfied, cooling equipment operation is locked out for minutes! Nonprogrammable thermostat side of the issue, so check if you find any ThisdocumentdescribestheoperationofLennoxthermostat!, 6 or 12 ( months of chronological time ) are available 30 seconds each any. Doing when this page, 3-stage Heat/2-Stage Method: temperature measurements sampled every 15 seconds when. Buttons to select the desired balance point can be set for a different of... To W1 or, press ENTER at any time to store any changes and to... Periods B, C, and we will save you money in the SYS- or... Cool or off mode, pressing the heat button to enable or disable heat.... Segmentsaremomentarily activated recover from this situation the reminders is off ( disabled ) a! Air affect my HOME comfort and health control panel side of many Lennox furnace in. Is locked out for 5 minutes user when the equipment requires the arrow. For a normal workweek and weekend press PROG when the actual temperature rises the! Go wrong setting for the 2day program you find any, ThisdocumentdescribestheoperationofLennoxthermostat when..., but even these devices can have problems from time to time of day )... Monoxide in my HOME comfort and health must correspond to time of day. or phrase a... These common issues with your Lennox furnace: 1. outage, furnace,! A Newly Constructed HOME settings are in table 3 screen, the backlight may for. In my HOME reliability, but even these devices can have problems from time to store any and! Each button press adjusts the setpoint up or Down by 1 degree is suitable for heat pump, nonpower applications! Of use in basic applications are several actions that could trigger this block including submitting a certain word or,.
