This allows it to cool down so much that the backup coils (stage 2) kicks in. Furnace Running Constantly? The first thing you want to do is check your thermostat if your heat pump won’t turn on. Heat pumps come with a built-in defrosting component that allows them to melt off accumulating frost during cold weather. Cheryl L Caulkins says. Of course the coils heat the house quickly and the whole things then stops correctly after a couple minutes. Most units run for a set amount of time after reaching desired temp. Turn the spa off immediately to prevent damage to the heater and the pumps. SAME PROB.AS STATED ABOVE WILL NOT TURN OFF WHEN IT REACHES PRESET TEMP. DON’T… go easy on your heat pump. This is perfectly normal. Your pump should NOT run continuously. My ac keeps running after it reaches the set tempature and wont turn off …i have to turn off manually nomatter what tempature is set on . Heat pump emergency heat This is easy to check. If this is the cause of your unit’s short cycling, then you will need a replacement for your HVAC system. I have a Lennox electric furnace (heat pump w/ aux heat I believe) that's about 10 years old. The best way to benefit from a heat pump’s superior efficiency is to use it for as much heating as it can handle. The problem is that it runs for 5+ minutes. First, it is important to realize that a furnace which is “short-cycling,” as we call it in the business, probably means that its safety features are working properly, so breathe a sigh of relief. I have a York model number ahp24b3xn21a furnace. Hi experts I have this strange issue with my heating system (heat pump with aux). If the pump is covered only with a layer of frost or with less than 1 ⁄ 16 inch (0.16 cm) of ice, it can defrost itself. Dixie Howell Sr. says. This is why__What people don't realize is your heat pump/AC/Furnance unit control temps with in a "Dead Band". Started out ohming my sensors, they both checked okay, test defrost initiated okay. This problem/situation is extremely common and it generates many service calls. I have an Amana model # ASZC16 heat pump and a Honeywell programmable thermostat.I have it set for 69 at night and 67 during the day. Heat Pump check #2: Is the fan or blower running at all? 1. In extremely cold weather conditions, a properly working heat pump will run almost continuously. Heat pumps are very energy efficient. A heat pump is different. 4. Now let’s say it cools to 26 degrees outside. Then, when the unit reaches a certain point, the defrost cycle should automatically switch on to keep the pump working normally. It reaches peak efficiency by maintaining a set temperature. Emergency Heat is typically triggered when it is 35°F and below outside. The thermostat is a basic Honeywell digitial. If your heat pump is not sized correctly, it may not be able to generate the capacity required for your space or shut off before the entire house reaches the desired temperature. When the heat is on and running and the thermostat is set to say 68F, when the room reaches 68F (measured at the thermostat on its scale), just disconnect the thermostat wires right there at the thermostat. This is not the case because your furnace is continuously running to reach your requested temperature, but it’s having some trouble. Heat Pump Defrost Cycle. If the home temperature goes down one, or sometimes two degrees, this causes the thermostat to bring on the auxiliary heat for a very short boost to supplement the heat pump. If your heat pump won’t turn on, you should check the thermostat, check the components, and find other signs of an issue. So if you think that there could be a problem, you should call our technicians to have a look. For example, I set it to 72 (it was only 73 inside before I turned it on). There are different methods of calculation that experts will use to determine the unit capacity that will suffice for your property. In this section, we will address why your furnace won’t turn off and what you can do to help it reach it’s programmed temperature. Fan keeps running when inside temp reaches set temp. No air would be better than blowing cold air! The bad news, the unit doesn't shut off when it reaches the temperature on the thermostat. It eventually kicks back on though and continues running until you repeat the process again of turning lower the temp setting. August 20, 2017 at 3:41 pm. If the unit constantly running is the only problem you’re having, then it’s not actually a problem at all. This is a fairly new issue about 6 months, and yes the spa is always up to the set temp. Overheated HVAC Unit. I suggest timing your unit. 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. They control how long the blower runs after reaching the desired temp. Do not worry. After the heat pump does its thing and shuts off the inside blower keeps running as a "cool down", fine. NOTE that working inside the air handler cabinet of a heat pump and working with electrical parts can be dangerous, so if you feel out of your element, it’s always after to call a heating repair technician. April 11, 2018 at 8:59 am. If you’re more familiar with a large furnace cycling off and on for most of the Indiana winter, then a heat pump running constantly, 24/7 makes you suspicious that something is wrong. Even during northern Virginia’s mild winters, a little ice on your heat pump is normal. Within 10-15 minutes, the thermostat read 72, but the pump remained on for several hours. It keeps blowing air that feels to be same temperature as inside; meaning it is not warmer/hotter. Let the heat pump defrost itself if it’s only covered with thin ice. And just like the previous complaint of Heat pump blowing cold air, some new heat pump owners may think their unit runs all the time because they aren't used to the longer run times and lower temperature output of a heat pump. This means lower electricity bills for a comfortable home – heat pumps are very inexpensive to run, increasing your electric bill by an average of $75 monthly per heat pump that is constantly running in the home. Why do our heating systems need a set point? I do think its only the circ pump running, but when we first got the spa, circ pump would shut off and we never tried changing anything like the timer (wouldn't know where it was anyway) Hubby's thinks with it running all the time it will burn out faster. This will force the heat pump to start and stop severally to compensate for the varying temperature reading on your thermostat. After the unit came up and ran in the heat mode for a while it ended up being the outdoor TXV. Heat Pump Troubleshooting Problem #2: RUNNING CONSTANTLY Heat pump running constantly in summer. Suggestions, besides moving to a place with gas heat. We have an Armstrong heat pump and electric furnace. When … It may continue to run, or startup for a couple of minutes after the boiler shuts down. In the greater St. Louis area, contact us at 314-993-1110 today so we can address your heating & air conditioning problems. The temp stays constant at night at 69 but the air keeps pumping out. Find the right setting (see #1), then leave it alone and let it work! Hello! Reply. The thermostat should be tuned to the right setting for the temperature and the season. Otherwise the heat contained in the metal could cause the water to boil. That is the way they are designed to work. This is to flush through very hot water in the modern small heat exchangers. System keeps running after it reaches its' set point but it is blowing cold air? If I switch it to off it still runs. This usually happens when the temperature is at it's coldest - 0 to 30 degrees. In fact, once an outside temp reaches below 21, your indoor temp could be several degrees below the thermostat setting. The only way to stop it is by - Answered by a verified HVAC Technician For example, some of the issues that can be easily repaired by homeowners include:… Continue Reading Troubleshooting Problems With Your Heat Pump I had a problem with a Lennox. If your heat pump is still not working, it’s time to continue to troubleshoot. 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. One thought on “ Solutions for a Heat Pump Icing Up During Winter ” Sidney August 14, 2020. In the summer, your heat pump might run constantly when your unit is struggling to reach a low set temp during those triple-digit heat waves. A set point is used to correctly size a system before installation. But if your heat pump is sized properly, your home may have a duct issue. A well-running heat pump works in cycles. Fan keeps running after reaching set point (heat). A heat pump that doesn’t turn on is a fairly common and easily remedied problem. Reply. Exception: for absences of over 24 hours, go ahead and turn it down. If you set your thermostat to 71 degrees in the winter and your house only get up to 69 degrees, it does not mean your heat pump isn’t functioning properly. Let’s say it is 28 degrees outside, the heat pump is running 100% as designed, the home is maintaining 72 degrees and all the heat made so far is cheap heat. Since this second stage heat source is designed to be just that, secondary, running your heat pump on emergency heat increases your HVAC system’s energy usage and results in escalating energy bills. However, if your heat pump coils freeze completely or the whole unit becomes encased in ice, your system won’t run well and the components will be at risk for damage. My thermostat will not maintain the number it is set to. But if it’s not very hot and your HVAC heat pump is not cooling, you probably need a service call. In time, though, those switches (that look like little pieces of aluminum foil) will wear out and cause the unit to run for long periods of time because they won't tell the blower to turn off. If you turn on your spa, hear the pumps running, but see no water flowing from the jets, the most likely culprit is an airlock. After inside temperature reaches to the set temperature, the unit and the fan does not stop. When the spa is refilled, some of that air may become trapped and act as a plug that keeps water from moving through the hot tub’s piping. Check the Thermostat . If heat keeps running (more than a couple of minutes if you have warm air heat), something else is wrong. If your furnace keeps turning on and off repeatedly, it can be stressful at best, and cold or downright uncomfortable at worst. Having your heat pump running constantly can either be normal or not, depending on the circumstances. I cannot figure out why it is doing this? 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. You may also like . I just had my heat pump replaced with a new 13-SEER 2 Ton York. Ductless heat pumps are designed to slowly ramp up and down, instead of turning on and off like a traditional HVAC system. Goodman heat pump does not click off when thermostat reaches desired temp. However, because many homeowners are not aware of how to fix it, they end up calling service technicians to repair problems that they could’ve fixed themselves. There are reasons why your heat pump does not reach temperature set on your thermostat. This is to say that if you set your temp to 70 degrees it might heat to 72 and not come on till the room temp falls to 68. This is the "Dead Band" and is usually set able on most controllers. Staying on and slowly ramping up and down is what makes ductless heat pump so efficient. From the beginning, the outside unit (compressor) would shutdown after about 45 minutes of running, but the air circulation fan would continue to run. The fan is not shutting off when the temp of the house is above what the thermostat is set for. Periodically, the coil will collect a layer of frost or thin ice when it’s cold outside. Ensure That Your Requested Temperature is Reasonable. Understanding why a heat pump freezes up is the first… Continue Reading 3 Reasons Why a Heat Pump Freezes Up and What to Do … I have a two-fold problem with Ruud heat pump controlled by Protech 620 thermostat: When heating, after room reaches set point temperature, the heater shuts off but fan keeps running, sometimes for hours before shutting off (if ever) It takes minimal energy for a ductless system to operate. Shown above: Supplemental Electric Resistance Heater Package. The good news is, my A/C is working and blowing lots of cool air. As long as the condensing fan motor can pull air into the unit, there is no need to worry. This is exactly what the heat pump is designed to do. When it gets to within 1.5 degrees of room temperature, the back-up heat cycles off and the heat pump continues running; trying to reach temperature, but cannot. My heat pump keeps running well past the set temp. 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