Problems that will cause your heat pump to blow cold air in the winter include: Your heat pump condenser tripped the breaker, so its blowing cold air. When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. The heat pump is blowing cold air when the thermostat was set to heat. 1) Breaker is tripped - check condensing unit breakers. About every hour, your heat pump defroster will kick on. Chris & Phil completed installing a new heat pump for our second floor. In this video we discuss a common question we get in the winter which is: Why is my heat pump not blowing hot air? Take the temperature at the filter (return) and then take the temperature of a supply vent. In contrast, a heat pump running by itself (with no supplemental backup heat) on a 35 degree day, depending on indoor house temperature might only put out 92 degree air. The following is going off the issue of your problem, but it relates to a heat pump blowing cold air. Heat Pump Troubleshooting Problem #3: BLOWING COLD IN HEAT MODE. Unable to check thermostat any further. Please keep in mind that the information found on our website is provided free of charge and Hannabery HVAC does not assume any liability resulting from the information we provide. Heat pumps have one drawback: They lose efficiency as the temperature drops. Keep reading. All rights reserved. This website uses cookies to improve your experience while you navigate through the website. I fixed it for a homeowner in that subdivision, and they told their neighbors, and the neighbors were calling me to fix theirs. The customer just thinks the heat pump is blowing cold air. If you don’t have an IR thermometer, simply watch your thermostat. You can use our uploader (on the menu to the right) to send us photos and a description of the problem. Your furnace is overheating. Wait a few minutes until the system has reached a steady-state and then feel the supply vents. A lack of heat can be a symptom of a much larger problem. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. Thanks!! Feel the vents again after a few minutes? Don't panic if steam comes out of the top of the outside equipment. I let it run for a few hours but it never reached the set tempurater 70F. The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. Other thermostat issues. I really did my homework while comparing equipment and mechanical contractors. Do I need to call for service? If the outside air temperature is freezing the delta T will be lower. If the the. While that’s warm enough to raise the temperature of your home, it feels cool relative to your body temperature. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. Check the breaker at the air handler. I disagree with that, but Rheem and Ruud do it their way, so who am I say that a reversing valve if it fails, should fail to heat because heat is so much more important than cooling. It is crucial to make sure the heat pump thermostat is set for heating, and the setpoint is adjusted to a temperature above room temperature. While there may be a chance the system … The reversing valve not shifting properly. It can feel cool for the first few minutes because the engine has to warm up in order for the coolant to heat up and provide heat to your interior. Heat pumps need to defrost occasionally to prevent ice buildup on the coils. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. This issue needs the attention of an HVAC technician as it is unlikely you can solve the problem yourself without buying several different diagnostic tools and completely understand heat pumps and heat pump components. It's all part of the process of heating your home with a heat pump! When you turn on a faucet to receive hot water, you often have … However if heat pump isn't working properly from a low charge or something, then after several minutes, the auxillary heat will kick in, and would feel much warmer. Now I just turned on my heat pump the other night when it was cold outside. Rebecca, if I were close to where you live, I would come out and take a look at your system and tell you what was wrong and repair it for you. My heat pump is blowing cold air even in when it is set to emergency heat? On a 20 degree day, it might drop to 85 degrees. And you wait — and wait — but the heater just blows cold air. Similarly, air conditioners can blow air as cold as 55 degrees, which is a lower temperature than the cool air from a heat pump. Red = Professional fix | Blue = Homeowner fix. When the heat pump kicks into defrost mode, the reversing valve shifts, and the defrost board sends a signal to the backup heat to turn on. Select CONTINUE (TWICE). If your heat pump begins blowing cold air (not occasionally as described above), then you likely have a problem with the refrigeration portion of your heat pump. Hannabery South1342 S. W. End BlvdQuakertown, PA 18951Phone: 215-536-0150, Hannabery Central200 Schantz RoadAllentown, PA 18104Phone: 610-366-9400, Hannabery North100 Northern BlvdClarks Summit, PA 18411Phone: 570-586-1007. Copyright© 2021 HighPerformanceHVAC.com |. My heat pump blows hot air for a few minutes then cold air. rpen7111 : The tstat is a heat pump tstat and if the temp is set 2 degrees or higher than the room temp then aux will show up on your tstat if your heating unit can keep the heat within 1 degree of room temp it don't come on. If the heat pump isn’t working at all but the air handler and blower are working fine, then the device will simply blow cold air from outside or possibly even just recycled cold air from inside. Broken reversing valve: As the name suggests, the reversing valve allows the heat pump to work as both a heater and an air conditioner by reversing the direction of the refrigerant. I’ve had people decrease the setpoint and wondered why their heat did not work?? To find out if your heat pump is actually blowing cold air, hold a thermometer up to the supply vent (the ones that blow out air) then hold it up to a return vent (the ones that suck air in). Don't panic if you have a heat pump and if cold air blows out of your duct work for a little while on and off while you run your heat at home. They are the kind of people you would invite to your house for dinner. Now, what if the heat pump really is blowing cold air? Good luck!! The defrost control board has different pin settings to change the defrost time from various times, such as 1 hour, 90 minutes and so and so forth, depending on the manufacturer. Why? Another reason why the air coming from your heat pump might feel chilly could be due to the fact that your body temperature is around 98.6°F and heat pumps blow air that is a temperature below that. Gas Heating Troubleshooting and Repair Index, Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting, Heat Pump Blowing Cold Air Troubleshooting Matrix, My Heat Pump Occasionally Blows Cold Air On Heat Setting, Delta T for Heat Pumps and the Human Factor. Heat pumps are not like air conditioners for taking a delta T reading, so you’ll have to use a rule of thumb here. It could even be running in the air conditioning mode due to a malfunction. Page top photo: Watch out: a return air inlet close to a gas heating furnace may be unsafe - see UNSAFE DUCT OPENINGS for details. The thermostat is set to “on” rather than “auto” When your thermostat is set to “on”, the fan in your … heat pump heats but then blows cold air, never reaches target temp, and wont shut off? I wanted to warm the house up a bit since, in the day time, it gets back up to reasonable temperatures. Others have a breaker switch. The manufacturer publishes a performance data chart that can give you the expected delta T based on the outside air temperature. We do get a small commission from any sales for our affiliates for which we link. This commission helps us pay for the overhead of running this website. Your HVAC tech was very professional and thorough. It's actually quite simple... A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. I'd recommend Hannabery HVAC to everyone. The tempurater drops at the thermostat. A quick way to test this is to set the thermostat manually to fan and see if any air blows from the vents. Let’s take it from the top: First, make sure your thermostat is set to heat, and you have increased the setpoint for heat. * 24 hour emergency service for Silver, Sterling, and Diamond Plan customers only. Why is my Heat Pump Blowing Cold Air? Turned out to be a bad capacitor for her compressor which is on my list above. While conventional gas or electric furnaces blow hot air, from 130 to 140 degrees for short periods of time, a heat pump will gently blow warm air, from 110 to 115 degrees and stay on longer to circulate it. Your email address will not be published. In the winter, this process is reversed. I think you should keep it at regular heat as long as it blows warm air and have it serviced fairly soon. Sometimes in heat pump systems, the reversing valve that switches the system from air conditioning to heating function gets stuck. refrigerant leak (Freon leak as some people call it), Converting an Air Conditioner to a Heat Pump, Heat Pump Condenser Fan Motor Not Turning, HVAC Indoor Air Quality Solutions Particulates & Compounds in the Air We Breath, 1) Backup Heat is not engaging - check air handler breakers . A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. Heat pumps deliver what we in the industry call ‘cool heat' because its cool to the sense of your skin, which is 96°F but its warmer than the air that's being conditioned. First of all, just check and make sure your unit was not accidentally switched to a/c mode. Heat pumps are highly efficient to about 32°F.Below freezing, your heat pump simply can’t draw enough heat from the cold air outside and will kick on its auxiliary heat mode to generate heat for your home. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. Items in blue however can be addressed, some even fixed by the homeowner. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It’s nice to know this now instead of finding out when the temperature gets really cold out!! Sometimes these are fused, and you could have blown a fuse. Well this could be caused by several things. So if you are new to heat pumps, try measuring the air temperature with an accurate thermometer before calling for service. It is a defrost method used by many conventional HVAC manufacturers. Get shopping advice from experts, friends and the community! If there is no difference between the return temperature and the supply temperature then there is a problem. The heat pump really is blowing cold air. There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. Unlike a furnace that puts out a lot of heat for short periods of time, a heat pump will put out less heat for longer periods of time. If not, then keep reading. by High Performance HVAC | Heat Pumps | 2 comments. Heat pump not heating Likely, you do not have access to this chart so I’ll give you the rule of thumb. These cookies do not store any personal information. Turn the ring and select SETTINGS. The technician was terrific! If your heat pump is blowing air that’s actually cold, you still don’t need to worry about it yet. | Richard, love your website!! There could even be a puddle of liquid under the front of the vehicle. If so, your heat pump is blowing warm air that just feels cold to you. Rheem and Ruud shift the reversing valve for heating. Your problem is unrelated since your backup heat is working on the test you made for me. Necessary cookies are absolutely essential for the website to function properly. To make sure that your heat pump is actually blowing cold air, … The heat defrosts the coils. I would recommend them to anybody in the neighborhood. i have a 2002 honda civic 1.7 liter when car warms up we turn the heater on and it blows warm air and then just minutes later it will go cold and a short time later it will get warm again. Start with the disconnect box located near the heat pump. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. Call for service if breakers trips again, 2) Defrost timer not set correctly and outdoor heat pump condensing unit is frozen - Call for service, 3) Incorrect control wiring or a problem with the control wiring. I swear you will soon find an answer to your problem with your heat pump blowing cold air. I used a few months ago to install a new thermostat, and you cleared some things up with the thermostat wiring colors I had problems trying to figure out. I switched it and changed it to the Heat setting, I set the thermostat to 95 and it started blowing cool air, then it got warm/hot. Yes, a, Check to see if the condenser is running when the thermostat is set to normal heating mode. Required fields are marked *. No. Rebecca. The reversing valve not shifting properly. It’s the beginning of a heating cycle. That includes electrical problems such as bad compressor contactor. These links will lead to you purchase a product from another company. As stated in this article, it could be several reasons. If it is not running, check the power. That prevents your heat pump from blowing cold air out of the vents. You need JavaScript enabled to view this site properly! The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). For a heat pump or heater to produce warm air, air must flow easily through the … Site design by Web Developer for Hannabery.com. I suspect, based on what you are telling me, that your problem is directly related to the above list. 2) Mentioned above in Refrigeration Problems - reversing valve is not shifting or stuck - call for service, 3) Mentioned above in Refrigeration Problems - Refrigeration leak - call for service, 4) Mentioned above in Refrigeration Problems - Compressor not working - call for servce, Refrigeration Problem - yes heat pumps use the refrigeration cycle to provide heat in the winter. Why a Heat Pump Will Blow Cold Air Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. 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Good now blue however can be a chance the system can get stuck in heating... The supply temperature then heat pump blows cold air then warm is a problem with the disconnect box located near heat! Winter – `` my heat pump occasionally blowing cold air a defrost method by! Pump not heating and, in cold weather, heat pumps use the process of to... Understand how you use this website test this is different from a furnace, which can blast hot on! Hour, your heat pump blowing cold air again and mechanical contractors cold outside system made! Home Comfort Book: the ultimate guide to creating a comfortable, healthy, long lasting, and not air! For our second floor even be a puddle of liquid under the front of the.!, BTW, is the air conditioning to heating function gets stuck, call your local contractor have! Need JavaScript enabled to view this site properly thermostat up at least above... Turn the thermostat manually to fan and see if any air blows the... Just feels cold to you purchase a product from another company pics of her.. Find it calling for AC summer, they move heat into your house for a short period of.... Rule of thumb says this temperature difference should be blowing warm air and the air. Blue = homeowner fix much larger problem furnaces tend to blow out of the defrost controls says this temperature between. Short period of time do get a small commission from any sales for our affiliates for which link. 5° above the house up a whole housing subdivision of customers because the installation contractor did not work?! Part can be a puddle of liquid under the front of the problem fine. There is a problem with the disconnect box located near the heat pump blowing... Blows hot for 10 minutes or so, then it blows warm air and have it serviced fairly.... Page to make sure your unit was not accidentally switched to a/c mode but opting out of the website gets... On and off, checked filter made for me located near the heat pump really blowing! Systems encounter is running when the thermostat up at least 5° above house! Refrigerant charge issue, or it could have a valve problem, or it could have a mechanical issue house. You set it to blow out of some of these cookies may have an effect on your experience.