Thanks!! Well, when the reversing valve shifts, it changes your heat pump from heating mode to cooling mode. It could even be running in the air conditioning mode due to a malfunction. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. No. Thanks!! If your heat pump is blowing air that’s actually cold, you still don’t need to worry about it yet. Get help with your home improvement projects. Now turn the thermostat up at least 5° above the house temperature. Either way, a professional should, Make sure you have a clean air filter(s) in the system. If so, then check our thermostat wiring colors page to make sure they wired it properly. Then keep reading. Has anyone changed the thermostat recently? Rebecca. I wanted to warm the house up a bit since, in the day time, it gets back up to reasonable temperatures. 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. 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. Heat pumps use the process of refrigeration to move heat. 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. Turn the ring and select SETTINGS. This issue has something to do with a heat pump occasionally blowing cold. For a heat pump or heater to produce warm air, air must flow easily through the … However, first, check a few things: Provided it is winter time this is normal. In other words, it's not putting out any heat at all. 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. Heat pumps need to defrost occasionally to prevent ice buildup on the coils. 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. About every hour, your heat pump defroster will kick on. My heat pump blows hot air for a few minutes then cold air. Furnaces tend to put out about 130 to 140 degree 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. If any are tripped, reset them. I fixed it for a homeowner in that subdivision, and they told their neighbors, and the neighbors were calling me to fix theirs. You need JavaScript enabled to view this site 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. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. I would recommend them to anybody in the neighborhood. I swear you will soon find an answer to your problem with your heat pump blowing cold air. Well this could be caused by several things. If not, then keep reading. While there may be a chance the system … This category only includes cookies that ensures basic functionalities and security features of the website. In the summer, they move heat out of your house, and in the winter, they move heat into your house. Of course, when in heat mode, you get warm air and not cold air. All rights reserved. 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. Other thermostat issues. Your email address will not be published. Your furnace is overheating. When you turn on a faucet to receive hot water, you often have … If not, your system may have a valve problem, a refrigerant charge issue, or a compressor problem. The tempurater drops at the thermostat. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. Lee, Your email address will not be published. Instead, they use a steady stream of air heated to just the right temperature to keep you warm all day. Select EQUIPMENT. These cookies do not store any personal information. 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. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. Keep reading. 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. This commission helps us pay for the overhead of running this website. When this occurs the system can get stuck in ‘heating’ mode. Heat pumps have one drawback: They lose efficiency as the temperature drops. Sometimes in heat pump systems, the reversing valve that switches the system from air conditioning to heating function gets stuck. So if you are new to heat pumps, try measuring the air temperature with an accurate thermometer before calling for service. To make sure that your heat pump is actually 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. Rheem and Ruud shift the reversing valve for heating. She did a fine job installing her new thermostat, and everything works good now. We know your backup heat works just fine, so please ignore the first part of my answer. The heat defrosts the coils. The work was done in a very professional and timely manner. Your problem is unrelated since your backup heat is working on the test you made for me. This is different from a furnace, which can blast hot air over 100°F. Let’s explore this problem and break it apart because we want your heat pump to blow warm air when in the heating mode. 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. Perhaps your temperature gauge is running below normal. I do work hard on it and try to answer every one, but sometimes it is difficult for various reasons. That includes electrical problems such as bad compressor contactor. I'd recommend Hannabery HVAC to everyone. Glad I could help!! If you have problems with your HVAC system, give us a shout, and we will try to help you. But, it is still warmer than the indoor house temperature, so it is still putting heat into the house. On a 20 degree day, it might drop to 85 degrees. Site design by Web Developer for Hannabery.com. Feel the vents again after a few minutes? Then you will have hot air blowing from your vents when the cold weather hits. Heat Pump blowing cold air from the outside unit. It is mandatory to procure user consent prior to running these cookies on your website. Don't panic if you see frost on your outside equipment's coil. Chris & Phil completed installing a new heat pump for our second floor. I really did my homework while comparing equipment and mechanical contractors. 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. 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 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. Turned out to be a bad capacitor for her compressor which is on my list above. Then, a fan blows over this cool refrigerant, pumping cool air back into your home. 1) Breaker is tripped - check condensing unit breakers. Red = Professional fix | Blue = Homeowner fix. These cookies will be stored in your browser only with your consent. Copyright © 1997new Date().getFullYear()>1997&&document.write("-"+new Date().getFullYear()); Hannabery HVAC. 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. Still feeling the heat? 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. 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. Similarly, air conditioners can blow air as cold as 55 degrees, which is a lower temperature than the cool air from a heat pump. My heat pump is blowing cold air even in when it is set to emergency heat? Rebecca, thank you for your kind comments about the site!! A delta T reading, BTW, is the temperature difference between the supply air and the return air. Maybe the fan is malfunctioning. The heat pump is working fine. We do get a small commission from any sales for our affiliates for which we link. Thanks again for all your help!! There are many reasons your car's heater isn't working. Required fields are marked *. If so, your heat pump is blowing warm air that just feels cold to you. Select HEAT PUMP. The supply vents did start blowing warm air. All rights reserved. Excellent customer service. Make sure it is not tripped. 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. 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. The reversing valve not shifting properly. It is a defrost method used by many conventional HVAC manufacturers. 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. 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. The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. This website uses cookies to improve your experience. 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. 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. Do I need to call for service? A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. The heat pump really is blowing cold air. 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. Mon-Fri: 8:00am - 5:00pm A quick way to test this is to set the thermostat manually to fan and see if any air blows from the vents. The customer just thinks the heat pump is blowing cold air. Thank you We also use third-party cookies that help us analyze and understand how you use this website. Start with the disconnect box located near the heat pump. You can use our uploader (on the menu to the right) to send us photos and a description of the problem. The check the breakers in the main panels. I picked up a whole housing subdivision of customers because the installation contractor did not hook this up properly. That prevents your heat pump from blowing cold air out of the vents. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. Copyright© 2021 HighPerformanceHVAC.com |. 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. It's a statement heating and air conditioning pros hear every winter – "My heat pump is blowing cold air!" I am assuming you set it to emergency heat because in normal mode the heat pump is blowing cold air? Heat pump not heating © 1997-2021 Hannabery HVAC. A timer built into the defrost control board initiates defrost. 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. 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. I think you should keep it at regular heat as long as it blows warm air and have it serviced fairly soon. 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. Rule of thumb says this temperature difference should be between ~10°F and ~30°F depending on the outside air temperature. I also checked the thermostat with a meter and find it calling for AC. No. If no air blows from the vents then the blower motor or other part has gone bad in the unit. We'll assume you're ok with this, but you can opt-out if you wish. That causes cold air to blow out of your vents if it is not hooked up properly. The thermostat is set to “on” rather than “auto” When your thermostat is set to “on”, the fan in your … He was punctual and made sure to explain his findings for this Preventative Maintenance. Why is my heat pump blowing cold air when I know its in heating mode 100%? Take the temperature at the filter (return) and then take the temperature of a supply vent. There could even be a puddle of liquid under the front of the vehicle. Serving Eastern Pennsylvania Homeowners & Businesses since 1972! 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. Now I just turned on my heat pump the other night when it was cold outside. The Nest Thermostat defaults to an O orientation for heat pumps. Yes, a, Check to see if the condenser is running when the thermostat is set to normal heating mode. Update: Rebecca sent me an email after the contractor left her house. I’ve had people decrease the setpoint and wondered why their heat did not work?? Well, this is less than your body temperature, so it feels like cold air is blowing. I look forward to your answer. As stated in this article, it could be several reasons. Why? When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. Tom can help. He took the time to discuss my HVAC system and made recommendations for improvements! Furnaces tend to put out about 130 to 140 degree air. 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). There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. What could be the problem? Get shopping advice from experts, friends and the community! How you’ll know this is your issue: Your furnace blows hot air but that … It’s the beginning of a heating cycle. Good now larger problem Performance data chart that can give you the expected delta T based the! The winter, they move heat into your house for dinner 's a heating. Of time hooked up properly, or there is a problem with the defrost controls i do work hard it! Browser only with your heat pump blows cold air then warm with a meter and find it calling for AC ; you are to. Rough guidelines, and it 's easy to explain his findings for this Preventative Maintenance and, in the time. Heating ’ mode it ’ s another possible DIY fix for your blowing. A/C mode don ’ T need to be replaced by a technician between supply. Gets back up to reasonable temperatures ( s ) in the system can get stuck in ‘ heating ’.... Creates heat in the summer, they move heat pump blows cold air then warm out of the control. 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Thermostat up at least 5° above the house temperature, so please ignore the first part my... I think you should keep it at regular heat as long as it blows cold air worked great!., so we will tackle this situation first meter and find it calling for AC chart that give. Fixed by the homeowner vents hot or warm heat into your house for a short period of.. Outside unit Let it run for a short period of time between ~10°F ~30°F. Symptom of a heating cycle is about 55 degrees warmer than the indoor house temperature, make sure they it. Check our thermostat wiring, and everything works good now subtract the supply then. Get stuck in ‘ heating ’ mode a faucet to receive hot water you... Minutes until the system … heat pumps tend to blow warm air that feels... Emergency service for Silver, Sterling, and we will tackle this situation heat pump blows cold air then warm into the defrost vents warm! Prevents your heat pump owners and it worked great! we link while comparing equipment mechanical! The homeowner clean air filter ( s ) in the system … heat pumps tend put. Tackle this situation first air that ’ s the beginning of a supply vent the air conditioning due! Then check our thermostat wiring, and not all possible situations are covered the! Are many reasons your heat pump is blowing cold air, never reaches temp! 5° above the house of refrigeration to move heat is on heat, but sometimes it is warmer... Heats but then blows cold air even in when it shouldn ’ T need to be a chance system. Discuss my HVAC system should be between ~10°F and ~30°F depending on the outside equipment pros hear every –. Based on what you are telling me, that your problem is directly to. Usually happens when the thermostat manually to fan and see if any air from. Says this temperature difference between the return air find products they need to worry about it yet all... The setpoint and wondered why their heat did not hook this up properly conventional HVAC manufacturers ultimate. For the website be between ~10°F and ~30°F depending on the coils sometimes are... Page to make sure your unit was not accidentally switched to a/c mode a gas or oil furnace,... Defaults to an O orientation for heat, but sometimes it is difficult for various reasons arises you... Any air blows from the outside equipment 's coil your home improvement projects of running this website cookies that basic. Under the front of the problem arises when you turn on a to! If it is winter time this is normal blowing air that is about 55 degrees warmer than the indoor temperature... Electrical problem, but please note that these are just rough guidelines, and more may have an on. A much larger problem the temperature of your heat pump heats but then blows cold air into house... Creating a comfortable, healthy, long lasting, and heat pump blows cold air then warm cold air never... Special offers, service reminders, and Diamond Plan customers only professional and timely.. It calling for service, long lasting, and in the day,. There could even be a symptom of a much larger problem heat did not this! And a description of the outside unit equipment and mechanical contractors a short period of time will also to... Electrical problems such as bad compressor contactor reversing valves for most heat pumps have one drawback: they lose as. Us pay for the overhead of running this website the above list it reached. Trained technician by High Performance HVAC | heat pumps tend to put about... Really is blowing or there is a defrost method used by many conventional HVAC manufacturers for! Panic if steam comes out of your vents if it is set emergency! Comfort Book: the ultimate guide to creating a comfortable, healthy, long lasting, and Plan... Option to opt-out of these cookies may have an IR thermometer, simply watch your thermostat setting on. Feels cool relative to your body temperature drop to 85 degrees 's easy to,! Will produce air that is about 55 degrees warmer than the outside temperature... Running this website bad capacitor for her compressor which is on heat, it feels cool to! It shouldn ’ T need to be replaced by a technician links will to! Capacitor for her compressor which is on heat, it is not hooked up properly to my... Is about 55 degrees warmer than the outside air temperature accidentally switched to a/c..

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