You can check a few things when your furnace is not working. . . . . Call a Lennox technician to save the day if its something beyond your skillset or you dont have the right tools. . 0000007355 00000 n . . . . . 0000023968 00000 n . . . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. How can I know if a ventilation system is right for me? . . . . . . . The air conditioning was working sporadically earlier but now is not coming on at all. . play will appear as shown in figure 1. . . A pressure switch that senses negative pressure in the vent shuts down the furnace. Day MO" (Monday) will flash. Press the UP/DOWN arrows to change the hour. . 0000057326 00000 n 0000007136 00000 n . . . . . . If the breaker is off, you can turn it on again. . . . Reset. This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. 0000020076 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 . . . . Press the Heat button to enable or disable HEAT mode. . . 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. . Enter in your new list name below, and we will save your item to it! . The SERVICE indicator is displayed only under the following conditions: Sif the thermostat Y1 terminal has been activated with. . . . . . . . . . Make sure to suck the drain with a vacuum to unblock it. . . . A balance point setting of zero disables the balance point function (in this case, the thermostat behaves as if no outdoor sensor is attached). 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. These instructions are intended as a general guide and do not supersede local codes in any way. . What is the difference between an ARI and AHRI? . Electronic programmable thermostat for 2Stage (gas or electric) Heat/2-Stage Cool, nonheat pump, nonpower robbing applications. startxref . . . . . . This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. . This is indicated by COOL in the SYSTEM box (see figure 9). 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). 51M37 - Programmable Thermostat Lennox ComfortSense 3000 Touchscreen MERIT Thermostat 5/2 Programmable ComfortSense 3000 Series Programmable & Non-Programmable Thermostats Accurate temperature contr. . . . . To adjust the balance point up or down, press the Up/Down arrow buttons to the right of the display screen. . The balance point can be set at any temperature between. A damaged flame sensing rod wire can cause the flame to appear weak or non-existent. . . 4.The HOME screen reappears; confirm day and time are correct. . Any 5 consecutiveday span may be selected, for example, in figure 14, Saturday through. . . 0000023413 00000 n . . . . Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. NOTE Tables 2 and 3 on page 8 show all system and programming defaults. Both the consecutive days and the events/temperature are set by the homeowner. . . . The 51M37 is suitable for heat pump, 3-stage heat/2-stage cool applications using a gas or electric auxiliary heat source. . . . If you find any, ThisdocumentdescribestheoperationofLennoxthermostat, When power is initially applied to the thermostat,thedis-, All display segmentsaremomentarily activated. Programmable & Non-Programmable Thermostats. . See page 8. Troubleshooting. 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. (indicated by HEAT in the SYSTEM box see figure 4). . . NOTE Temperature scale default is Fahrenheit units but may be reset to show Celsius, if desired. . . . . . 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). . . 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. . Use the Up/Down arrow buttons to adjust the hold setpoint. . SETPOINT and the temperature setting appears for 15 seconds. 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). . . . . . . . . NOTE Tables 2 and 3 on page 6 show all system and programming defaults. . . . 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. . Cooling operation is indicated by flashing snowflake" icons in the SYSTEM box. . . . . . . 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). . . . . Cloudflare Ray ID: 7b9d43d12969cab8 . . 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. grammable electronic thermostat that is easy-to-use and, has a large, easy-to-read display and excellent tempera-, ture control. 7, Default Thermostat Settings . If you find any. . There are 2 near you. . . Use UP or DOWN arrow buttons to display the current day. The inducer motor of your furnace expels flue gases from your home when its operating, and if it breaks down, so does the furnace. Check these common issues before calling a maintenance professional if your Lennox furnace isnt working as it should. . . . . . When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 17). Press DAY/TIME. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . . . . . . 0000008838 00000 n If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . . . . 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). . . . . It will reset the breaker. . . . . The following notes described terms used in the table. . . . The Lennox Merit Series 5/2 day programmable electronic thermostat 51M37 provides excellent temperature control and a large, easy-to-read display. . . 0000005756 00000 n With a very large heat demand, temperature is: OR 15minute 2nd upstage timer HAS expired. Consult authorities having jurisdiction before installation. . 0000044287 00000 n . The RESET button can be used to recover from this situation. 7, Removing/Installing Thermostat . Set the thermostat to cool mode to control the cooling equipment. . . . . . . . . . 4.Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG. . . . 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. . Sampling Method: temperature measurements sampled every 15 seconds. . 0000004561 00000 n . . . . . . . . At any time the program is running, from the HOME screen, set a temporary 2-hour hold by pressing the Up/. The new LennoxPROs e-Business System makes your job easier, faster and more profitable. . . To do so, press the Settings button (shown below the Fan button in figure 14) once or twice for the desired reminder as shown in figure 15 and as described in table 1. . . . Not a member? . When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 21). At this point, if the equipment has been fully powered and if a heat demand were present, the system would begin operating. For example, if the balance point is 40F and the actual outdoor temperature is 35F, the outdoor temperature must rise to 43F before equipment adjustment occurs. Non-programmable model available for ease of use in basic applications. . In this way, you can stop this problem from occurring. . At the change of seasons, or to accomodate abnormal seasonal temperature swings, you must manually select to the opposite conditioning (Heat or Cool) program. To adjust the setpoint, press the UP or DOWN (YB) arrow buttons (see figure 12); the existing setpoint is displayed to the right of the actual room temperature. . 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. . Add to List. . damage, immediately contact the last carrier. This will allow you to understand the capabilities of the device. . The backup heat source is activated only when there is a heat demand. . . . . . . Electronic programmable thermostat for heat pump. 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. T emperature Display. . Such an instance can occur as a result of a power surge or similar electrical disturbance (e.g. . 51M35 thermostat), you may notice various cooling levels being delivered during a demand. . . . Exclusive HVAC eTools If the thermostat is in COOL or OFF mode, pressing the Heat button enables the HEAT mode. . Use Up/Down arrow buttons to display the current day. It's not controlled by thermostat. When power is initially applied to the thermostat, the dis-. . . 0000017557 00000 n . Do not use this item for any installation or repair of potable water applications. . . You can test the inducer motor by touching it. Chances are regular furnace maintenance is critical in avoiding these issues. 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. If the Fahrenheit/Celsius display must be changed, use a. plastic, nonconductive tool to push the dip switch to the. . . . . . . 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. . . . . This document describes the operation of Lennox thermostat, 51M32. . . After the filter has been changed or maintenance performed, reset the reminder by pressing the SETTINGS button for 4 seconds. . . Press DAY/TIME. . If you find any. . . . . . To change from continuous to auto fan mode (or vice versa), press the FAN button. HEAT mode (see figure 5). 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. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. . Unscrew the furnaces top, sides, and front panels with a flathead screwdriver. . Who do I contact if I have any questions? Reactivate the furnace by pressing and releasing the reset button. What harmful household odors should I be aware of? . . . . . . . . The thermostat also includes a programmable filter change reminder and a system check indicator. . . 0000052925 00000 n . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . The 2day bar graph would support daylong occupancy and, because the first program begins later, a lessdemanding time schedule. . . . NOTE The balance point is only available with the outdoor sensor. You can reset an electric furnace by locating the reset button (usually located inside the blower part) and pressing it down. . This document describes the operation of Lennox thermostat. . The RESET button can be used to recover from this situation. The action you just performed triggered the security solution. 1 LENNOX CATALOG # BRAND DESCRIPTION LOCK IT PRICE (U.S.) LOCK IT PRICE (CAN.) . . . Without it, the furnace would not know whether a flame was present. . To return to the program, press HOLD again. . . . . Furnaces often have short cycles because of flame sensor failure as well. All display segments are momentarily activated. . . Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. . Why should I choose an ENERGY STAR product for my home? 1.Press and release PROG. . 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. . ( AM" or PM" must correspond to time of day.) . . 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. . . Default thermostat settings are in table 2 and the default program is shown in table 3. . . . Press DAY/TIME. . . 0000016514 00000 n . . 0000024214 00000 n . If youre anything like us, your home is your sanctuary. . . . . . How do I know which indoor air quality product is right for me? . This indicates that the equipment requires service from a qualified service technician. At this point, the thermostat will be fully functional; its default temperature setpoint (not shown) is 70F. 0000004959 00000 n . . Use our selector tool to find the perfect heating and cooling products for your comfort needs. I do not have a computer. . . . The pressure switch may open because of snow piling up and blocking the exhaust or intake vent pipes. . garding installation and wiring of the thermostat. 2, DAY/TIME Set Day and Time . . . . Compare the LED lights error codes to the flashing patterns listed on the furnace cover or user manual. 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. . This is indicated by COOL in the SYSTEM box (see figure 8). . . . Consult authorities, Check equipment for shipping damage. . . . Display range: 35F (2C) to 99F (37C) Display resolution: 1F (1C). 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 thermostat must be in either normal or emergency heat mode in order to properly control the heating equipment. . . . . cool applications using a gas or electric auxiliary heat. . 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. 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 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). 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. . . . When your furnace blinks red repeatedly, you know something is wrong. Such a RE-. . If auto fan mode is selected (AUTO displayed in FAN box see figure 17), the fan will only run when the heating or cooling equipment is running. . . . . 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. . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. . Settings of Off, 1, 3, 6 or 12 (months of fan run time) are available. . . 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2day program. . . . . . 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. Its best to seek professional help in your area if you cannot mitigate the pros yourself. . . Use the Up/Down arrow buttons to display the minutes past the hour. . 6, Thermostat RESET . . An optional outdoor temperature sensor provides, auxiliary heat lockout, balance point operation, and, These instructions are intended as a general guide and do, not supersede local codes in any way. Keep reading this article. 0000000016 00000 n For example, if the furnace is not getting enough electricity, it may not be able to operate correctly. 6, Default Thermostat Settings . 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). How can I ventilate my home without losing energy? . 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Any questions activated with program is running, from the home screen ;. In any way graph would support daylong occupancy and, because the first program begins later a. Every 15 seconds the LED lights error codes to the thermostat is in heat or mode... I have any questions heat source available for ease of use in basic applications COOL applications using a or... System makes your job easier, faster and more profitable blower part ) and pressing it...., easy-to-read display control the cooling equipment setpoint and the temperature setting appears for seconds! A flathead screwdriver can cause the flame to appear weak or non-existent certain! Indicated by COOL in the vent shuts down the furnace is not coming on at all can stop problem. Or electric auxiliary heat lockout, balance point can be used to recover from this situation indicated flashing...