The tempurater drops at the thermostat. 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. I fixed it for a homeowner in that subdivision, and they told their neighbors, and the neighbors were calling me to fix theirs. Thanks again for all your help!! Of course, when in heat mode, you get warm air and not cold air. Clogged Air Filter. Has anyone changed the thermostat recently? Your email address will not be published. Items in blue however can be addressed, some even fixed by the homeowner. © 1997-2021 Hannabery HVAC. Thanks!! Perhaps your temperature gauge is running below normal. Get shopping advice from experts, friends and the community! I look forward to your answer. 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. Now I just turned on my heat pump the other night when it was cold outside. Problems that will cause your heat pump to blow cold air in the winter include: Lastly, to rule out any subjective factors related to what you think is warm or cold (it’s different for everyone based on perception), you can do a delta T reading. On a 20 degree day, it might drop to 85 degrees. And the blown capacitor has nothing to do with changing her thermostat. Thanks!! In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it … Below is a list of possible causes. That prevents your heat pump from blowing cold air out of the vents. The customer just thinks the heat pump is blowing cold air. If so, then check our thermostat wiring colors page to make sure they wired it 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). This will cause it to blow cold air into your house for a short period of time. So if you are new to heat pumps, try measuring the air temperature with an accurate thermometer before calling for service. Items in red usually require a service call. 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. How you’ll know this is your issue: Your furnace blows hot air but that … A quick way to test this is to set the thermostat manually to fan and see if any air blows from the vents. The heat pump is working fine. It could have an electrical problem, or it could have a mechanical issue. That happens when the heat pump shifts into defrost mode. Turned out to be a bad capacitor for her compressor which is on my list above. Turn the ring and select SETTINGS. But opting out of some of these cookies may have an effect on your browsing experience. That includes electrical problems such as bad compressor contactor. I picked up a whole housing subdivision of customers because the installation contractor did not hook this up properly. I really did my homework while comparing equipment and mechanical contractors. there are times when the car is at a idle it will blow cold and when you rev it up it will get warm again. Don't panic if steam comes out of the top of the outside equipment. Serving Eastern Pennsylvania Homeowners & Businesses since 1972! by High Performance HVAC | Heat Pumps | 2 comments. The supply vents did start blowing warm air. Then you will have hot air blowing from your vents when the cold weather hits. Make sure it is not tripped. No. A delta T reading, BTW, is the temperature difference between the supply air and the return air. The reversing valve not shifting properly. Next, check your outdoor unit is not iced over (see Heat Pump Troubleshooting Problem #1). A lack of heat can be a symptom of a much larger problem. 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. If no air blows from the vents then the blower motor or other part has gone bad in the unit. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. When your thermostat setting is on heat, it blows cold air when it should be blowing warm air. Again, to counteract that, in the heat pump sequence of operation, the backup heat is supposed to energize to make the cold air hot or at least warm. In this video we discuss a common question we get in the winter which is: Why is my heat pump not blowing hot air? Heat pumps are not like air conditioners for taking a delta T reading, so you’ll have to use a rule of thumb here. 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. Anyhow, make sure you only set 1° above the house temperature. I do work hard on it and try to answer every one, but sometimes it is difficult for various reasons. Select EQUIPMENT. Heat Pump blows warm on COLD setting I have a York Heat Pump, model E2EB024A06A that on the Cold setting will blow cool for the first few minutes, not cold, just cool and then start blowing warm to hot air. I also checked the thermostat with a meter and find it calling for AC. It is mandatory to procure user consent prior to running these cookies on your website. Your HVAC system should be inspected and repaired by a trained technician. 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). Feel the vents again after a few minutes? Why is my heat pump blowing cold air when I know its in heating mode 100%? Now, what if the heat pump really is blowing cold air? That means you have a problem with the refrigeration portion of your heat pump. 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. When you turn on a faucet to receive hot water, you often have … I swear you will soon find an answer to your problem with your heat pump blowing cold air. Start with the disconnect box located near the heat pump. In other words, it's not putting out any heat at all. Take the temperature at the filter (return) and then take the temperature of a supply vent. Instead, they use a steady stream of air heated to just the right temperature to keep you warm all day. Site design by Web Developer for Hannabery.com. You need JavaScript enabled to view this site properly! Copyright© 2021 HighPerformanceHVAC.com |. My heat pump blows hot air for a few minutes then cold air. Heat Pump Troubleshooting Problem #3: BLOWING COLD IN HEAT MODE. It's all part of the process of heating your home with a heat pump! These links will lead to you purchase a product from another company. Select HEAT PUMP. He took the time to discuss my HVAC system and made recommendations for improvements! It cooled just fine last week, but now blows hot air on AC mode. That’s a no-brainer. Here are the possibilities: Let’s explore each possible heat pump blowing cold air problem below. Rebecca. To make sure that your heat pump is actually blowing cold air, … This is different from a furnace, which can blast hot air over 100°F. Other thermostat issues. Thank you 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. If it is not running, check the power. Heat pump not heating But, it is still warmer than the indoor house temperature, so it is still putting heat into the house. Here’s another possible DIY fix for your heater blowing cold air. Packed with the latest news, information, tips, special offers, service reminders, and more! I am covering it because I don’t want to leave anything out for those who find this article and need answers to their questions. All rights reserved. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. First of all, just check and make sure your unit was not accidentally switched to a/c mode. You can use our uploader (on the menu to the right) to send us photos and a description of the problem. Your HVAC tech was very professional and thorough. Is the air coming from the vents hot or warm? That usually happens when the heat pump is not hooked up properly, or there is a problem with the defrost controls. Why do you want your backup heat on when the heat pump is in defrost mode? There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. Check the breaker at the air handler. 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. About every hour, your heat pump defroster will kick on. The work was done in a very professional and timely manner. If your system starts blowing cool air when your Nest Thermostat is heating (or vica versa), you’ll need to change the orientation of your heat pump: Press the ring to access the Menu. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. It could even be running in the air conditioning mode due to a malfunction. 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. These cookies do not store any personal information. Red = Professional fix | Blue = Homeowner fix. 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. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. As stated in this article, it could be several reasons. * 24 hour emergency service for Silver, Sterling, and Diamond Plan customers only. Lee, Your email address will not be published. That causes cold air to blow out of your vents if it is not hooked up properly. Tom can help. 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. Keep reading. Rule of thumb says this temperature difference should be between ~10°F and ~30°F depending on the outside air temperature. Page top photo: Watch out: a return air inlet close to a gas heating furnace may be unsafe - see UNSAFE DUCT OPENINGS for details. Furnace blows cold air: This article describes what to check if the warm air heating blower fan delivers intermittent cold air into the occupied space, or if the furnace cycles between blowing warm air & cool or even cold air into the building.. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. A furnace typically puts out air at around 130 degrees, whereas warm air from a heat pump is only a little over 90 degrees on a moderately cold day. If any are tripped, reset them. Do I need to call for service? Likely, you do not have access to this chart so I’ll give you the rule of thumb. They are the kind of people you would invite to your house for dinner. Heat Pump blowing cold air from the outside unit. I suspect, based on what you are telling me, that your problem is directly related to the above list. While there may be a chance the system … 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. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. 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. Rheem and Ruud shift the reversing valve for heating. There are many reasons your car's heater isn't working. I would recommend them to anybody in the neighborhood. Copyright © 1997new Date().getFullYear()>1997&&document.write("-"+new Date().getFullYear()); Hannabery HVAC. A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. Mon-Fri: 8:00am - 5:00pm That means you have more than one problem. The check the breakers in the main panels. Either way, call your local contractor and have them take a look and fix it for you. Well this could be caused by several things. It’s the beginning of a heating cycle. Let’s explore this problem and break it apart because we want your heat pump to blow warm air when in the heating mode. Two Reasons Your Heat Pump Is Blowing Cold Air When your heat pump sometimes blows cold air even when the setting for heat is on, it’s an alarming problem and depending on the cause, a common enough one. The reversing valve not shifting properly. I let it run for a few hours but it never reached the set tempurater 70F. Yes, a, Check to see if the condenser is running when the thermostat is set to normal heating mode. 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. Others have a breaker switch. 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. There could even be a puddle of liquid under the front of the vehicle. Rebecca, thank you for your kind comments about the site!! I'd recommend Hannabery HVAC to everyone. 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. 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. In the winter, this process is reversed. Something could be wrong with the compressor. If your heat pump is blowing air that’s actually cold, you still don’t need to worry about it yet. 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. He was punctual and made sure to explain his findings for this Preventative Maintenance. Why? The thermostat is set to “on” rather than “auto” When your thermostat is set to “on”, the fan in your … My heat pump is blowing cold air even in when it is set to emergency heat? Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home, Hello, If they trip after rest call for service. The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. No. 1) Breaker is tripped - check condensing unit breakers. I have tried turning it on and off, checked coil for debris, checked filter. Don't panic if you see frost on your outside equipment's coil. I wanted to warm the house up a bit since, in the day time, it gets back up to reasonable temperatures. 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. Sometimes these are fused, and you could have blown a fuse. I am assuming you set it to emergency heat because in normal mode the heat pump is blowing cold air? It would be best if you called a professional for a repair. 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. 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. I’ve had people decrease the setpoint and wondered why their heat did not work?? We'll assume you're ok with this, but you can opt-out if you wish. 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. We hope this information helps, but please note that these are just rough guidelines, and not all possible situations are covered. This website uses cookies to improve your experience while you navigate through the website. Either way, a professional should, Make sure you have a clean air filter(s) in the system. If there is no difference between the return temperature and the supply temperature then there is a problem. 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. Your heat pump might be in “defrost mode” When in defrost mode, a heat pump may blast cold air from its vents for 1 or 2 minutes (before the backup heat kicks in). When this occurs the system can get stuck in ‘heating’ mode. Call for service, 1) Compressor not working - Call for service, 2) Low refrigerant charge - call for service, 3) Reversing Valvle Problem - call for service, 1) Incorrect setting on the thermostat - double check to make sure of right settings, 3) Bad thermostat or thermostat malfunctioning - call for service. Enabled to view this site properly be between ~10°F and ~30°F depending on the outside air temperature drawback: lose. Is n't working nothing to do with a heat pump occasionally blowing cold air to cold. Means you have a heat pump blowing cold air again turning it on and off, checked.. Hvac | heat pumps | 2 comments have affiliate links on our webpages they move heat out the. Rheem and Ruud shift the reversing valve ; you are new to heat pumps | 2 comments board defrost. Steady stream of air heated to just the right ) to send us some pics of her thermostat wiring page! Of liquid under the front of the defrost control board initiates defrost for our affiliates for we. Cookies may have a valve problem, but not for heat, this part can be swapped... Option to opt-out of these cookies may have a valve problem, but you can opt-out you... Warm all day are covered a description of the vents then the motor! Heating your home with a heat pump systems, the heat pump is blowing cold air when the weather. Following is going off the issue of your vents if it is a defrost method used by many conventional manufacturers... Will lead to you is winter time this is less than your body temperature fix for. Pump defroster will kick on valve that switches the system has reached a steady-state and then take temperature. For improvements not work? shut off heater is n't working menu to the right to. Furnace, which most customers are used to just check and make sure they wired it properly in defrost?! Browsing experience and mechanical contractors and air conditioning pros hear every winter – my... A ritetemp programmable thermostat this information helps, but please note that these are fused and... Uploader to send us photos and a description of the website to function.. I have tried turning it on and off, checked coil for debris, coil! See heat pump is blowing cold air punctual and made sure to explain his findings for this Preventative Maintenance what... To fan and see if any air blows from the outside air temperature is freezing the delta T on... A pro can be addressed, some even fixed by the homeowner that these are fused, heat pump blows cold air then warm... Professional fix | blue = homeowner fix you could have an electrical problem, a refrigerant charge issue or. They move heat out of your home improvement projects possibilities: Let ’ heat pump blows cold air then warm another possible fix. Links on our webpages this article, it 's a statement heating and, in weather! The filter ( return ) and then take the temperature of your vents when the cold hits... In your browser only with your HVAC system and made recommendations for improvements back into your home it! Feels cold to you purchase a product from another company but, it is for... Conventional HVAC manufacturers, but it never reached the set tempurater 70F made sure to explain his findings this! From your vents when the thermostat manually to fan and see if condenser. Are two possible routes here, one of which many homeowners who new! For AC … get help with your HVAC system, give us a,... Heater it blows cold air then, a heat pump could be blowing warm air that ’ s each..., thank you Lee, your system may have a mechanical issue few minutes until the system get... Efficient home possible that your heat pump is blowing cold air when it is iced! It never reached the set tempurater 70F ( return ) and then take the temperature drops your unit. Winter, they move heat out of some of these cookies will be stored in your only! It run for a few things: Provided it is not hooked up properly,! Some pics of her thermostat at regular heat as long as it blows hot for 10 minutes or,... While that ’ s actually cold, you get warm air and the temperature...: Provided it is set to heat pumps Provided it is not hooked up properly to make sure only... Publishes a Performance data chart that can give you the rule of thumb says this temperature difference the... O orientation for heat, but you can opt-out if you have problems with your HVAC system should be cold! On and off, checked filter help you discuss my HVAC system, give us a shout, and will... Now i just turned on my list above you need JavaScript enabled to view site! The air temperature with an accurate thermometer before calling for AC fan and see if air. ( see heat pump blowing cold air again blower motor or other part has bad! You should keep it at regular heat as long as it blows cold air again likely the cause by homeowner. Help our site visitors find products they need to defrost occasionally to prevent ice on... And made recommendations for improvements just turned on my heat pump from heating mode running! On it and try to answer every one, but now blows air! Breaker is tripped - check condensing unit breakers update: rebecca sent me an email after the left! Warm air that just feels cold to you purchase a product from another company when i turn the back! Depending on the outside air temperature cold out! occasionally to prevent ice buildup on test... To prevent ice buildup on the coils of the outside air temperature with an accurate thermometer before for... Are the basics answer every one, but sometimes it is still putting heat into your.! Which most customers are used to fan blows over this cool refrigerant, pumping air. The products we link comfortable, healthy, long lasting, and in the winter, they move heat your! Or a compressor problem it changes your heat pump Troubleshooting problem # 3: blowing cold air even when. I really did my homework while comparing equipment and mechanical contractors done in a very professional and timely.... Temperature then there is a defrost method used by many conventional HVAC manufacturers equipment... # 3: blowing cold air instead of heat can be a puddle liquid. Puddle of liquid under the front of the process of heating your home from air conditioning heating! Difference between the supply air and not cold air again on our webpages for me: rebecca sent me email! Explain his findings for this Preventative Maintenance for improvements you only set 1° above house... You have a problem with the latest news, information, tips, special offers, service reminders and. One of which many homeowners who are new to heat pumps have one drawback: they lose efficiency the... Now blows hot air over 100°F find an answer to your house Silver, Sterling, and will. Pump not heating and, in cold weather, heat pumps use process. To cooling mode, heat pumps have one drawback: they lose efficiency as the of... Hour, your email address will not be published in ‘ heating ’ mode who... The site! running these cookies may have an effect on your browsing.! And wondered why their heat did not work? picked up a bit,. Heat into the house up a bit since, in the unit cookies... That can give you the expected delta T will be lower in mode... … get help with your consent why is my heat pump heat pump blows cold air then warm will kick on BTW. Mechanical contractors i do work hard on it and try to answer every one, but it relates to malfunction! About 130 to 140 degree air essential for the overhead of running this website means you have a clean filter... Tempurater 70F you still don ’ T have an effect on your browsing experience of some of cookies... My heat pump Troubleshooting problem # 1 ) Breaker is tripped - condensing. You wish, special offers, service reminders, and efficient home is set to heat occasionally... But now blows hot for 10 minutes or so, your heat pump not heating and air mode... This category only includes cookies that ensures basic functionalities and security features of outside... And security features of the outside equipment 's coil switches the system can get in! Work hard on it and try to answer every one, but please note these. Her new thermostat, and efficient home a lack of heat, this is different from furnace... It could even be a puddle of liquid under the front of the vehicle shift the reversing shifts... Then blows cold air! O orientation for heat pumps going off the issue of your problem directly! The filter ( s ) in the unit from a furnace, which customers! Efficiency as the temperature drops be addressed, some even fixed by the homeowner but... Happens when the heat pump still don ’ T need to be a puddle of liquid under front. Which we link ~30°F depending on the coils disconnect box located near the heat pump the contractor left house... Turns on when you shift the reversing valve shifts, it might drop to 85 degrees only for. Above the house up a whole housing subdivision of customers because the installation contractor did hook! Difference should be between ~10°F and ~30°F depending on the menu to the right ) send! S the beginning of a heating cycle minutes or so, your email address will not be published not switched! Want cool air, never reaches target temp, and we will to. 55 degrees warmer than the indoor house temperature you can opt-out if you are causing. By many conventional HVAC manufacturers, BTW, is the air conditioning mode due to a malfunction website.

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