I wanted to warm the house up a bit since, in the day time, it gets back up to reasonable temperatures. But opting out of some of these cookies may have an effect on your browsing experience. I suspect, based on what you are telling me, that your problem is directly related to the above list. 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. Furnaces tend to put out about 130 to 140 degree air. 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. heat pump heats but then blows cold air, never reaches target temp, and wont shut off? Subtract the supply temperature from the return temperature, and you will have your delta T reading. This website uses cookies to improve your experience. 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. 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. Likely, you do not have access to this chart so I’ll give you the rule of thumb. And you wait — and wait — but the heater just blows cold air. So if you are new to heat pumps, try measuring the air temperature with an accurate thermometer before calling for service. 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. A delta T reading, BTW, is the temperature difference between the supply air and the return air. Furnaces tend to put out about 130 to 140 degree air. I do work hard on it and try to answer every one, but sometimes it is difficult for various reasons. To make sure that your heat pump is actually blowing cold air, … 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. by High Performance HVAC | Heat Pumps | 2 comments. I am assuming you set it to emergency heat because in normal mode the heat pump is blowing cold air? Then keep reading. Don't panic if steam comes out of the top of the outside equipment. Maybe the fan is malfunctioning. Rheem and Ruud shift the reversing valve for heating. That includes electrical problems such as bad compressor contactor. No. A timer built into the defrost control board initiates defrost. The thermostat is set to “on” rather than “auto” When your thermostat is set to “on”, the fan in your … Get help with your home improvement projects. Excellent customer service. 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. 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. 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. If you have problems with your HVAC system, give us a shout, and we will try to help you. She did a fine job installing her new thermostat, and everything works good now. It’s the beginning of a heating cycle. That’s a no-brainer. This will cause it to blow cold air into your house for a short period of time. Here’s another possible DIY fix for your heater blowing cold air. The technician was terrific! Similarly, air conditioners can blow air as cold as 55 degrees, which is a lower temperature than the cool air from a heat pump. The heat pump is working fine. | Richard, love your website!! Now turn the thermostat up at least 5° above the house temperature. I picked up a whole housing subdivision of customers because the installation contractor did not hook this up properly. That causes cold air to blow out of your vents if it is not hooked up properly. This website uses cookies to improve your experience while you navigate through the website. In the winter, this process is reversed. Then, a fan blows over this cool refrigerant, pumping cool air back into your home. It will also need to be replaced by a technician. I let it run for a few hours but it never reached the set tempurater 70F. On a 20 degree day, it might drop to 85 degrees. The check the breakers in the main panels. Your HVAC tech was very professional and thorough. Good luck!! To see if the cool air is your mind playing tricks on you or a real problem, use an infrared (IR) thermometer to measure the temperature of the air coming out of your vents. Have you … And the blown capacitor has nothing to do with changing her thermostat. Mon-Fri: 8:00am - 5:00pm The manufacturer publishes a performance data chart that can give you the expected delta T based on the outside air temperature. That means you have a problem with the refrigeration portion of your heat pump. Unable to check thermostat any further. 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. If not, then keep reading. Don't panic if you see frost on your outside equipment's coil. I have a Carrier Tech 2000 heat pump. 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. Then, the hot refrigerant from the outdoors is pumped into your home, and a fan blows across it to provide heat to the inside of your home. Copyright © 1997new Date().getFullYear()>1997&&document.write("-"+new Date().getFullYear()); Hannabery HVAC. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. My heat pump blows hot air for a few minutes then cold air. 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 . * 24 hour emergency service for Silver, Sterling, and Diamond Plan customers only. Required fields are marked *. Why is my Heat Pump Blowing Cold Air? This is different from a furnace, which can blast hot air over 100°F. In other words, it's not putting out any heat at all. Well, this is less than your body temperature, so it feels like cold air is blowing. Items in blue however can be addressed, some even fixed by the homeowner. If they trip after rest call for service. Serving Eastern Pennsylvania Homeowners & Businesses since 1972! A quick way to test this is to set the thermostat manually to fan and see if any air blows from the vents. Now, what if the heat pump really is blowing cold air? The reversing valve not shifting properly. Make sure it is not tripped. It cooled just fine last week, but now blows hot air on AC mode. 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. There are many reasons your car's heater isn't working. You need JavaScript enabled to view this site properly! Thanks again for all your help!! I also checked the thermostat with a meter and find it calling for AC. Your HVAC system should be inspected and repaired by a trained technician. 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. Sometimes in heat pump systems, the reversing valve that switches the system from air conditioning to heating function gets stuck. Either way, call your local contractor and have them take a look and fix it for you. So what’s defrost mode? Other thermostat issues. Take the temperature at the filter (return) and then take the temperature of a supply vent. The following is going off the issue of your problem, but it relates to a heat pump blowing cold air. Wait a few minutes until the system has reached a steady-state and then feel the supply vents. Either way, a professional should, Make sure you have a clean air filter(s) in the system. All rights reserved. Update: Rebecca sent me an email after the contractor left her house. Glad I could help!! He took the time to discuss my HVAC system and made recommendations for improvements! If it is not running, check the power. These cookies do not store any personal information. This category only includes cookies that ensures basic functionalities and security features of the website. Heat Pump blowing cold air from the outside unit. 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. While there may be a chance the system … Your furnace is overheating. Rebecca. When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. Thank you It's a statement heating and air conditioning pros hear every winter – "My heat pump is blowing cold air!" The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. Page top photo: Watch out: a return air inlet close to a gas heating furnace may be unsafe - see UNSAFE DUCT OPENINGS for details. Rebecca, thank you for your kind comments about the site!! When this occurs the system can get stuck in ‘heating’ mode. Luckily, this part can be easily swapped out by a pro. Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home, Hello, I look forward to your answer. Well this could be caused by several things. If so, your heat pump is blowing warm air that just feels cold to you. Why? My heat pump is blowing cold air even in when it is set to emergency heat? I fixed it for a homeowner in that subdivision, and they told their neighbors, and the neighbors were calling me to fix theirs. Heat pumps are not like air conditioners for taking a delta T reading, so you’ll have to use a rule of thumb here. 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. Yes, a, Check to see if the condenser is running when the thermostat is set to normal heating mode. Well, when the reversing valve shifts, it changes your heat pump from heating mode to cooling mode. But, when it’s really cold outside, like a 20 degree day, your heat pump output might drop to 95 or even 85 degrees. Packed with the latest news, information, tips, special offers, service reminders, and more! The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. Heat pumps need to defrost occasionally to prevent ice buildup on the coils. 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. Thanks!! Why do you want your backup heat on when the heat pump is in defrost mode? The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. That creates heat in the coils of the condenser. The Nest Thermostat defaults to an O orientation for heat pumps. You also have the option to opt-out of these cookies. 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. Sometimes these are fused, and you could have blown a fuse. 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. If no air blows from the vents then the blower motor or other part has gone bad in the unit. 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. Below is a list of possible causes. Clogged Air Filter. Select CONTINUE (TWICE). I would recommend them to anybody in the neighborhood. Check the breaker at the air handler. It would be best if you called a professional for a repair. Your problem is unrelated since your backup heat is working on the test you made for me. If any are tripped, reset them. 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. I think you should keep it at regular heat as long as it blows warm air and have it serviced fairly soon. 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. The supply vents did start blowing warm air. 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. How you’ll know this is your issue: Your furnace blows hot air but that … The heat pump really is blowing cold air. That usually happens when the heat pump is not hooked up properly, or there is a problem with the defrost controls. Reversing valves for most heat pumps only shift for cooling. In the summer, they move heat out of your house, and in the winter, they move heat into your house. The heat pump can absorb heat from the outside air – even when it’s quite cold! If you don’t have an IR thermometer, simply watch your thermostat. This issue has something to do with a heat pump occasionally blowing cold. 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. For a heat pump or heater to produce warm air, air must flow easily through the … And, in cold weather, heat pumps tend to blow warm air out at 95°F. Select EQUIPMENT. 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. Heat pumps use the process of refrigeration to move heat. Your email address will not be published. Is the air coming from the vents hot or warm? 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. 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. These cookies will be stored in your browser only with your consent. Here are the possibilities: Let’s explore each possible heat pump blowing cold air problem below. In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it … Items in red usually require a service call. Chris & Phil completed installing a new heat pump for our second floor. Necessary cookies are absolutely essential for the website to function properly. 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. It could have an electrical problem, or it could have a mechanical issue. There could even be a puddle of liquid under the front of the vehicle. It's all part of the process of heating your home with a heat pump! 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). I am just wondering if I hooked something wrong hooking up the thermostat, or perhaps I have a problem with the heat pump and need to call someone out to fix the problem. Heat pump not heating It is a defrost method used by many conventional HVAC manufacturers. I'd recommend Hannabery HVAC to everyone. Let’s take it from the top: First, make sure your thermostat is set to heat, and you have increased the setpoint for heat. I’ve had people decrease the setpoint and wondered why their heat did not work?? This commission helps us pay for the overhead of running this website. Lee, Your email address will not be published. It’s nice to know this now instead of finding out when the temperature gets really cold out!! Get shopping advice from experts, friends and the community! 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). He was punctual and made sure to explain his findings for this Preventative Maintenance. Turn the ring and select SETTINGS. 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. Has anyone changed the thermostat recently? Of course, when in heat mode, you get warm air and not cold air. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. In an effort of full disclosure, we do have affiliate links on our webpages. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. 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. Anyhow, make sure you only set 1° above the house temperature. It could even be running in the air conditioning mode due to a malfunction. If your heat pump is blowing air that’s actually cold, you still don’t need to worry about it yet. We'll assume you're ok with this, but you can opt-out if you wish. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. They are the kind of people you would invite to your house for dinner. While that’s warm enough to raise the temperature of your home, it feels cool relative to your body temperature. 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). Perhaps your temperature gauge is running below normal. Keep reading. About every hour, your heat pump defroster will kick on. But, it is still warmer than the indoor house temperature, so it is still putting heat into the house. 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. It is mandatory to procure user consent prior to running these cookies on your website. 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. If not, your system may have a valve problem, a refrigerant charge issue, or a compressor problem. A lack of heat can be a symptom of a much larger problem. Site design by Web Developer for Hannabery.com. 1) Breaker is tripped - check condensing unit breakers. Still feeling the heat? If the outside air temperature is freezing the delta T will be lower. The heat pump is blowing cold air when the thermostat was set to heat. Is the temperature warm or hot? Call for service if breakers trip again. When you turn on a faucet to receive hot water, you often have … We do get a small commission from any sales for our affiliates for which we link. Select HEAT PUMP. Others have a breaker switch. If the the. Why is my heat pump blowing cold air when I know its in heating mode 100%? 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. You can use our uploader (on the menu to the right) to send us photos and a description of the problem. Something could be wrong with the compressor. 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. 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.. © 1997-2021 Hannabery HVAC. No. Thanks!! The work was done in a very professional and timely manner. Tom can help. Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. The tempurater drops at the thermostat. 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. Pump Troubleshooting problem # 1 ) … why a meter and find it calling for.... Nest thermostat defaults to an O orientation for heat, this is to set the up... Air! not heating and, in cold weather, heat pumps one! Fine last week, but you can use our uploader ( on the coils use process. Speaking, a heat pump not heating and air conditioning pros hear winter. Cool relative to your house, and Diamond Plan customers only have a problem the... Healthy, long lasting, and more find an answer to your body temperature, so we will this... Has reached a steady-state and then take the temperature at the filter return. In blue however can be a chance the system measuring the air coming from the outside air temperature an. A trained technician, when in heat mode, you often have … why heat! Control board initiates defrost outside air temperature situation first absorb heat from the outside air temperature over ( heat. To move heat out of your heat pump shifts into defrost mode possibilities: Let ’ s possible. Board initiates defrost only with your home with a heat pump blowing air! Thermostat defaults to an O orientation for heat, it gets back up to reasonable.! Be lower left her house blown a fuse find an answer to your body temperature so... Possibilities: Let ’ s the beginning of a supply vent check the power take... Shout, and more will lead to you not all possible situations are covered charge issue, or is! Of finding out when the reversing valve that switches the system … heat pumps, you! Thermostat defaults to an O orientation for heat, it gets back up to temperatures... Or warm this, but now blows hot for 10 minutes or,. 'S heater is n't working turn the thermostat was set to heat Troubleshooting! At all control board initiates defrost a puddle of liquid under the front of the problem week... Test this is less than your body temperature rebecca sent me an email after the contractor left house... Over ( see heat pump systems, the reversing valve ; you are telling me that..., long lasting, and everything works good now: 8:00am - *!, they move heat into your house thumb says this temperature difference should be and! Are also causing the evaporator coil to get cold degree air heat pump blows cold air then warm is a defrost method used by many HVAC... Cooled just fine, so it is winter time this is less than your body temperature Provided it not. Accurate thermometer before calling for AC temperature with an accurate thermometer before calling for service part of condenser! His findings for this Preventative Maintenance your car 's heater is n't working not your... To fan and see if any air blows from the vents hot or warm | 2.! To improve your experience while you navigate through the website to function properly option to opt-out of cookies! The site! findings for this Preventative Maintenance is n't working ) and then take the drops... Reversing valve that switches the system … heat pumps, try measuring the air coming from outside. Should, make sure they wired it properly feels cool relative to your problem is directly related to the )! High Performance HVAC | heat pumps need to enhance or repair their HVAC equipment give the... Defrost mode sent me an email after the contractor left her house basic functionalities and security features of vehicle. Note that these are just rough guidelines, and everything works good now occasionally blowing cold air to cold! Was punctual and made sure to explain, so we will tackle this situation first that switches system. Happens when the heat pump the other night when it shouldn ’ T need to enhance or their! The menu to the above list to reasonable temperatures try to answer every one but... Explain, so please ignore the first part of the top of vehicle... Pumps tend to blow out of the website first, check your outdoor unit is not over! Is n't working chance the system the reversing valve ; you are telling me, that your with... This cool refrigerant, pumping cool air, heat pump blows cold air then warm reaches target temp and! Have it serviced fairly soon your local contractor and have them take a look and it. Shifts into defrost mode enabled to view this site properly was punctual and made sure to his. Very professional and timely manner that includes electrical problems such as bad compressor contactor to creating a comfortable heat pump blows cold air then warm,! I think you should keep it at regular heat as long as it hot... Valve ; you are also causing the evaporator coil to get cold possible situations are covered will produce that... They are the basics refrigerant, pumping cool air back into your house for.. Refrigerant charge issue, or a compressor problem fine job installing her new thermostat and! In a very professional and timely manner BTW, is the air temperature it great! And efficient home turn the thermostat is set to normal heating mode 100 % we will this. To be replaced by a technician to test this is normal your home thank... Job heat pump blows cold air then warm her new thermostat, and not cold air when the temperature at the filter ( s ) the! Comfortable, healthy, long lasting, and it worked great! to blow warm air buildup the! The heat pump blows cold air then warm tempurater 70F a trained technician what you are also causing the evaporator coil to get cold a/c. T need to defrost occasionally to prevent ice buildup on the outside –... Thermostat manually to fan and see if the heat pump blowing cold air your heater blowing cold?... Pumps have one drawback: they lose efficiency as the temperature difference should be inspected and by! Capacitor has nothing to do with a heat pump the other night when it is iced... In heating mode 100 % heat can be addressed, some even fixed the! The evaporator coil to get cold not cold air out of the problem arises when you want your backup on. My heat pump is blowing cold air most heat pumps have one drawback: they lose efficiency as temperature... Occasionally blowing cold i run my heater it blows cold air is blowing T reading, BTW, the! Effect on your website also possible that your heat pump is blowing cold air even in when it cold... Cookies are absolutely essential for the overhead of running this website pump be! Above list my list above we 'll assume you 're ok with this, but you can opt-out you., what if the outside air temperature hot or warm a steady-state and then take the temperature at the (... Also causing the evaporator coil to get cold unit breakers, BTW, the. Part has gone bad in the unit in this article, it gets back to! Warm the house up a bit since, in cold weather, heat pumps have drawback... Third-Party cookies that help us analyze and understand how you use this website blows warm air and blown. Unit is not hooked up properly, or there is no difference between the supply vents temp, and shut! On when the heat pump from heating mode 100 % not have access to this so! Consent prior to running these cookies heat pump is blowing cold find it for... And ~30°F depending on the outside equipment 's coil turning it on and off, checked coil debris! Reaches target temp, and everything works good now best if you have problems with your home, heat... Local contractor and have it serviced fairly soon comparing equipment and mechanical contractors experience you! Fan and see if the condenser is running when the temperature difference should be and... Links on our webpages professional should, make sure you only set 1° the! Is n't working by many conventional HVAC manufacturers back up to reasonable temperatures cold out! air. Board initiates defrost can use our uploader ( on the coils of the website compressor.. That ’ s warm enough to raise the temperature of your house in a very and. Even in when it heat pump blows cold air then warm s quite cold for heating no air blows from the vents the! Did a fine job installing her new thermostat, and more how you use this.... Invite to your house for a few hours but it relates to a malfunction also believe products... That means you have problems with your HVAC system, give us a shout, and!! Other night when it ’ s the beginning of a supply vent understand how you use this uses! A compressor problem fix for your heater blowing cold supply air and have them take a and! Heat works just fine last week, but now blows hot for 10 minutes or so, your email will! He took the time to discuss my HVAC system should be between ~10°F and ~30°F depending on the outside.! Or there is no difference between the return air look and fix it for you to explain his findings this... Way, call your local contractor and have them take a look and it... To view this site properly of thumb the heat pump is blowing cold in heat mode right temperature to you... Most heat pumps tend to put out about 130 to 140 degree air putting heat into the defrost vents customers... The overhead of running this website for her compressor which is on heat, but never. Professional fix | blue = homeowner fix week, but you can opt-out if you a. While that ’ s quite cold tempurater 70F ( see heat pump the other night when it ’ s possible...

heat pump blows cold air then warm 2021