Have had 3 tries to solve this problem including a new thermostat and though it achieves set point the system still does not shut itself off. The furnace keeps running and continuously heating after the set temperature is reached. It blows warm air out of all of the registers for around four to five minutes and then shuts off well before the temperature has reached 68 degrees. The thermostat is a basic Honeywell digitial. Furnace blower: set up with blue wire (medium low) for heat. Posted by TLC - November 24, 2015 - Energy Efficiency, Furnaces, General, Heating A furnace that is running properly cycles on and off to maintain the temperature in your home. Contractor's Assistant: Do you plan on doing the work yourself? 0. Keep in mind, you're not just cooling the air, you're also cooling the contents etc. Thermostats will often fail after a number of years of use. https://www.petro.com/.../furnace-ac-fan-constantly-running Turn on the Heat switch. This article was originally published in November 2015. If heat keeps running (more than a couple of minutes if you have warm air heat), something else is wrong. Before you contact P. Gagnon & Son to request a service call, there are two things you can try to see if you can solve the problem. Eugene Silberstein Member Posts ... inside is a deal called a fan limit switch. Thank you for your help. That takes time. There are also a set of switches in the unit that relay the thermostat demands to the unit. Why Does the Blower on My Furnace Keep Running? For example, at 5pm the furnace is set to to go to 72 degrees. If the blower is running but no heat is coming out, replace the filter. Only after al of these steps have taken place, will your furnace begin to run in normal operation (which is why it take a while for your furnace to turn on after you put it in heat mode). My furnace's motor keeps running after heating the home. Suggestions, besides moving to a place with gas heat. It eventually kicks back on though and continues running until you repeat the process again of turning lower the temp setting. Any thoughts on what can be adjusted to fix this. Check the vents. On a normal 32-degree cloudy day, to hold 68-degrees, furnace cycles on 4-5 time/hour. It is supposed to stay on for two to three minutes after the furnace shuts off in order to push the last of the warm air out into the house. The furnace keeps cycling and the temperature goes into the mid-70s. With routine maintenance, tune-ups, and inspections before the … When your furnace keeps running after the temperature has been reached: Check the blower motor – See whether it’s your blower motor or the whole furnace that’s running non-stop. If it’s cold, the blower alone is running. Hello! You are not alone. “Winter is getting colder in Michigan, and my family is having issues with our furnace. There is some other problem we haven't thought-of. A clogged furnace filter can cause a furnace to shut off. If you cannot get the furnace to stop running, the problem may be with the thermostat. We turn it on, set it to 68 degrees, and wait. Has your furnace stopped blowing warm air before it reaches the target temperature? Now, many of you must be thinking after reading about all of these safety features, that your furnace keeps turning on and off because one of these has failed. are already performed. February 24, 2018 AmbientHVACAdmin Blog No Comments. My issue is that it appears that the furance blows cool air when the target temp is reached according to the programmable thermostat. put the temp at 68 at Tstat, gas heat comes on room temp passes ... the heat pump continues to run even after the set temp on tstat has been reached. push it … All other items such as reset, updating to latest SW etc. It would probably keep running but I turn the thermostat to off, which kind of defeats the purpose of installing a programmable thermostat. Air feels very fast, brief, and harsh out of vents in home. I have another thermometer that reads close to the same temperature. A furnace fan normally keeps blowing after the heating element shuts off, until the internal furnace temp drops to a set point/til a set time; that point should be adjustable. During the middle of winter, a broken down furnace is something no one wants. It turns on fine when the thermostat tells it to, blows fine and the heat stops once the set temp is reached but the fan keeps running. Furnace Won’t Start or Keeps Running After Temperature is Reached in Hampden, MA. Test the thermostat by setting the temperature to one or two degrees warmer than room temperature. Coleman electric Furnace blower keeps running after temp is reached. My furnace keeps running after the set temperature is reached. We have 3 zones Only the zone controlled by this thermostat is affected. I just installed a Honeywell programmable thermostat and set it to 65. But it sounds like your problem is the thermostat is in the wrong location, and/or your ducts to some rooms are more obstructed than others. If the current temp shows greater than the set temp (or it doesn't show the current temp), but you feel like the AC is running too long, it may be that the AC needs to cool off the whole house, especially the area around the thermostat. Reader Question: possible shorted thermostat wires. Troubleshooting tips when your furnace keeps running after the set temperature is reached. Dirty filters are the most common cause of furnace problems. ON makes your furnace’s blower run non-stop but AUTO will tell your furnace’s blower to run only when heat is being produced, so it should shut off once your home reaches the desired temperature. I also followed one thread where it was suggested to switch G to Y1 and Y1 to G wires. The furnace circulates the air it warms through the house by means of a fan. Specific. They control how long the blower runs after reaching the desired temp. No air would be better than blowing cold air! It does this repeatedly and never actually heats the house. If your furnace is running constantly, it’s a sign that you may have a problem. In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. Note: If your thermostat fan is set to ON, your furnace isn’t actually running non-stop—just the blower fan is. Heat keeps running. I have a York model number ahp24b3xn21a furnace. This switch keeps the blower running after the call for heat has been satisfied in order to extract the heat from the furnace, which is … This is a very common furnace problem, and can be very frustrating if you are trying to maintain a comfortable indoor environment at just the temperature you like. Our furnace thermostat failed after an adjacent water heater installation. Lennox furnaces are quality units; however, similar to other furnaces, By Staff Writer Last Updated Mar 26, 2020 1:48:50 AM ET In a gas furnace, the blower will continue to run if the fan switch on the thermostat is set to any setting other than auto. If you find yourself thinking, “Why does my furnace shut off before reaching the temperature I’ve set”? The only way to stop the furnace is to turn the temp on the t-stat all the way up and then all the way down, then it will stop running. Wait to hear the clicking sound that indicates the furnace has kicked on. ... Carrier 58SXA Gas Furnace shuts off before temp reached [ 9 Answers ] I have a Carrier "Weathermaker" 58SXA gas furnace that has recently starting acting up. To do this, feel the air coming from the vents; if it’s warm, the furnace and blower are both running. When your furnace isn’t actually heating, though, your furnace blower shouldn’t be running at all. Most units run for a set amount of time after reaching desired temp. Details. The problem at hand is that the furnace only shuts off it you lower the temp setting 2-3 degree's below the room temp. The furnace will get stuck, run constantly, and keep heating the house. Is there a fix for this (Honeywell thermostat) Contractor's Assistant: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat? Jump to Latest ... 2012. even after the temp inside the house has been reached and passed. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. I have a Lennox electric furnace (heat pump w/ aux heat I believe) that's about 10 years old. Why is my furnace running constantly? I am new to the forum and also just purchased a TH with a very old GE air forced gas furnace (installed 30 years or so ago). The furnace blower motor is often run on a separate circuit (120 vs 24 V) which is controlled by it's own fan limit switch. I have a programmable thermostat that lets the temperature drop at … It may be only the blower motor that’s running and not the entire furnace. The fan is not shutting off when the temp of the house is above what the thermostat is set for. I have an old weil mcclain oil fired boiler with a beckett rwb burner and a white rodgers control unit. it has a dial on it likely set 150 200 with a 50 degree temp span. If the fan stays on after this period, then it starts pushing cold air into the house, which could account for the uneven temperature control. This is a goodman heatpump/furnace. System keeps running after it reaches its' set point but it is blowing cold air? Your blower should run constantly until the heating cycle ends. : Do you plan on doing the work yourself blower motor that ’ a! 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