. . . Use the Up/Down arrow buttons to adjust the hold setpoint. Someone has cracked a damaged ceramic insulator on a flame sensing rod. 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. A Lennox furnace requires regular maintenance to keep it running efficiently and optimally. Figure 15 gives an example of how the two sets of programs can be set for a normal workweek and weekend. This may have links to the furnace problem. . . Why should I be concerned about my home's air? . . . Make sure there are no obstructions in front of the exhaust and intake vent pipes on high-efficiency furnaces. . . . . . . Merit series 5/2 day programmable thermostat, temperature control and a large, easy-to-read display. . All display segments are momentarily activated. Read the operation manual on this page to properly set up the operation of the programmable digital thermostat. . With a very large heat demand, temperature is: OR 15minute 2nd upstage timer HAS expired. . . 2.Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached. Set the thermostat to heat mode to control the heating equipment. . . . . . . . . As a bonus, this Lennox furnace troubleshooting guide will save you money in the long run and prolong the life of your system. . . Started yesterday I took the back off - Answered by a verified HVAC Technician . Whose claim do I believe? You should change your furnace filters every two to three months. (figure shows temperature in Fahrenheit units). . 2.Minutes will flash. . . . Check for a power outage, furnace filter, or furnace blower. . The document contains a 8 of pages in English with detailed descriptions and pictures of the Lennox 51M34 Merit thermostat. . 0000019470 00000 n . . I cut the wire while to re route it but I had turned it off Ask an Expert Home Improvement Questions HVAC Questions Ask Your Own HVAC Question image.jpg image.jpg image.jpg BillyHvac cutting the wires if they were live likely didn't ruin the thermostat? . . . With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. The SLP98V gas furnace claims to be the "most efficient and quietest furnace you can buy." . When the actual temperature rises above the temperature setpoint, the flame icon will disappear. Cooper Green Team - Lennox Wifi Thermostat - Troubleshooting & Help Cooper Heating & Cooling 47 subscribers Subscribe 9.8K views 4 years ago Cameron from the Cooper Green Team is going to show. The default temperature setpoint in Hold mode is 70F. Remove the front panel of the furnace . . . This is normally controlled by applying 120V AC power to it from the air handler. . . . . 4, FAN Controlling Fan Operation . . Refer to the installation manual for instructions regarding installation and wiring of the thermostat. When power is initially applied to the thermostat, the dis-. If you find any, ThisdocumentdescribestheoperationofLennoxthermostat, When power is initially applied to the thermostat,thedis-, All display segmentsaremomentarily activated. The limit switch is located on the control panel side of many Lennox furnace models. . The 51M35 thermostat can be programmed to perform a set of either heating or cooling events (but not a combination of heat and cool) for 5 consecutive days using a set of 4 unique events per day. . . 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. 0000008239 00000 n Replace these to see if they work correctly. . . . . . 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). . 3.Day MO" (Monday) will flash. Satisfied Customers: 26,469. . 0000005756 00000 n The air conditioning was working sporadically earlier but now is not coming on at all. How can I tell if there is carbon monoxide in my home? . . . . . 0000025642 00000 n . . . Default thermostat settings are shown in table 2 and the default program is shown in table 3. . . . . Use UP or DOWN arrow buttons to display the current day. . Buttons are located behind the small door on the right hand side of the thermostat (see figure 3). . . . . . . If the breaker is off, you can turn it on again. 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. 0000052925 00000 n . . . . . At the change of seasons, or to accomodate abnormal seasonal temperature swings, you must manually select to the opposite conditioning (Heat or Cool) program. . . . . 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. A pressure switch that senses negative pressure in the vent shuts down the furnace. 0000001516 00000 n . . . . What are some of the harmful effects of ozone? . (indicated by HEAT in the SYSTEM box see figure 4). . . . . There is no setting or field repair for this. . . This oc-. . . . . . 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). . . . . . . . The critical components of a Lennox furnace are the heat exchanger, blower, humidifier, thermostat, and auxiliary controls. . . . See page 8. . Such a RE-. 0000057326 00000 n . . . . . . . . . . Not a member? If the thermostat is in heat mode, pressing the Heat button enables EMG. Day MO" (Monday) will flash. . It is back today, Hi, the power to my house went off last night. . 6, Removing/Installing Thermostat . . . . . 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 does that compare to a whole-home humidifier? How is a home air purification system different from a filtration system? Both have benefits and drawbacks, but the non-condensing model is more commonly used in homes because its less expensive and smaller than the condensing model. . . . 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. . . . . 51M35 thermostat), you may notice various cooling levels being delivered during a demand. Check back soon. . 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 thermostat is in cool mode, pressing the Cool button disables COOL mode (indicated by OFF in the SYSTEM box see figure 5). . . The main breakers have been Reset and it still isn't coming on. . . 4. Do ozone generators actually make the air worse to breathe? . TEM box. You can email the site owner to let them know you were blocked. . 0000029601 00000 n . . Do not use this item for any installation or repair of potable water applications. . If your system supports 2stage cooling (as does the. Learn More List Price: $135.20 Your Price: $120.31 (You save $14.89 ) (No reviews yet) Write a Review SKU: 51M37 . . . reset" the thermostat to its default condition. . . . . 0000008316 00000 n 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. 0000003257 00000 n %PDF-1.5 % . . . . . 5, FAN Controlling Fan Operation . . Exclusive promotions Exclusive HVAC eTools Refer to the installation manual for instructions regarding installation and wiring of the thermostat. . . . Make sure the furnace has power before you begin working on it. play will appear as shown in figure 1. Should I Cover My Air Conditioner or Heat Pump In The Fall And Winter? . . The backup heat source is activated for at least 3 minutes if no buttons are pressed during the demand interval. . . . 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). . . . . . . . . . . Locate the inducer motor on the top box of the furnace. . . . . . Both the minimum compressor OFF timer and the minimum equipment cycle timer can be overridden by pressing and holding either the HEAT or COOL button down for 4 seconds. When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 21). . . %%EOF . View FAQs to find answers to questions you may have about the operation of your heating or cooling system. . . . . . . When power is initially applied to the thermostat, the dis-. . . . . NOTE The HOME screen will reappear about 15 seconds after the final arrow button press. . NOTE Tables 2 and 3 on page 8 show all system and programming defaults. Access to pricing and ordering Add to Cart. . Use the FAN button to select either continuous fan mode or auto fan mode. . The pressure switch may open because of snow piling up and blocking the exhaust or intake vent pipes. Thermostats are one of the problems we may encounter in gas furnaces that may hinder their operation. . . . There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Call: +44 1782 576800 Radwell is not an authorized distributor, reseller or representative of the products featured on this website. . . . Use the Up/Down arrow buttons to select the desired minute; press PROG. . . Upload manuals that we do not have and get. . . . . No store found for that zipcode and search radius. At Lennox, we love our owners and seek to support them in every way possible. If the thermostat is in normal heat mode when the HEAT button is pressed, then emergency heat mode is enabled. . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. 7, Default Thermostat Settings . After a demand has been satisfied, cooling equipment operation is locked out for 5 minutes. Why is proper air circulation important in the home? If the breaker is in the middle, move it to the off position. . . . . . . 0000003631 00000 n . How do I know which humidifier is right for me? 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. . . . 6, SETTINGS Balance Point . . . . . . . Why can't I purchase Lennox products online? 1F and 55F (17C to 13C). . 0000016514 00000 n . . . What products are NOT covered under warranty? . I do not have a computer. . . 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