That creates heat in the coils of the condenser. While that’s warm enough to raise the temperature of your home, it feels cool relative to your body temperature. Have you … That means you have a problem with the refrigeration portion of your heat pump. But, it is still warmer than the indoor house temperature, so it is still putting heat into the house. Now turn the thermostat up at least 5° above the house temperature. Is the air coming from the vents hot or warm? 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. These links will lead to you purchase a product from another company. 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. Why is my heat pump blowing cold air when I know its in heating mode 100%? 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. The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. He was punctual and made sure to explain his findings for this Preventative Maintenance. 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. * 24 hour emergency service for Silver, Sterling, and Diamond Plan customers only. 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. The heat defrosts the coils. Items in red usually require a service call. Rebecca. In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it … Heat pumps need to defrost occasionally to prevent ice buildup on the coils. I picked up a whole housing subdivision of customers because the installation contractor did not hook this up properly. 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. Select CONTINUE (TWICE). We also use third-party cookies that help us analyze and understand how you use this website. While there may be a chance the system … Of course, when in heat mode, you get warm air and not cold air. Heat pump not heating And the blown capacitor has nothing to do with changing her thermostat. These cookies do not store any personal information. You can use our uploader (on the menu to the right) to send us photos and a description of the problem. When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. We'll assume you're ok with this, but you can opt-out if you wish. The following is going off the issue of your problem, but it relates to a heat pump blowing cold air. I have a Carrier Tech 2000 heat pump. As stated in this article, it could be several reasons. Get shopping advice from experts, friends and the community! We have a heat pump and a ritetemp programmable thermostat. This category only includes cookies that ensures basic functionalities and security features of the website. The reversing valve not shifting properly. It could even be running in the air conditioning mode due to a malfunction. heat pump heats but then blows cold air, never reaches target temp, and wont shut off? Unable to check thermostat any further. That means you have more than one problem. 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. 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. It’s the beginning of a heating cycle. Serving Eastern Pennsylvania Homeowners & Businesses since 1972! Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. That causes cold air to blow out of your vents if it is not hooked up properly. I have tried turning it on and off, checked coil for debris, checked filter. I look forward to your answer. It cooled just fine last week, but now blows hot air on AC mode. This is different from a furnace, which can blast hot air over 100°F. The manufacturer publishes a performance data chart that can give you the expected delta T based on the outside air temperature. We hope this information helps, but please note that these are just rough guidelines, and not all possible situations are covered. It could have an electrical problem, or it could have a mechanical issue. Site design by Web Developer for Hannabery.com. They are the kind of people you would invite to your house for dinner. Glad I could help!! Get help with your home improvement projects. For a heat pump or heater to produce warm air, air must flow easily through the … Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home, Hello, In an effort of full disclosure, we do have affiliate links on our webpages. Still feeling the heat? by High Performance HVAC | Heat Pumps | 2 comments. Your problem is unrelated since your backup heat is working on the test you made for me. Your HVAC tech was very professional and thorough. 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. Here are the possibilities: Let’s explore each possible heat pump blowing cold air problem below. Well this could be caused by several things. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. 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. 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). Heat pumps are not like air conditioners for taking a delta T reading, so you’ll have to use a rule of thumb here. Excellent customer service. There could even be a puddle of liquid under the front of the vehicle. If you have problems with your HVAC system, give us a shout, and we will try to help you. The heat pump really is blowing cold air. The work was done in a very professional and timely manner. All rights reserved. Do I need to call for service? Call for service if breakers trip again. 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. Items in blue however can be addressed, some even fixed by the homeowner. I do work hard on it and try to answer every one, but sometimes it is difficult for various reasons. Heat Pump Troubleshooting Problem #3: BLOWING COLD IN HEAT MODE. Perhaps your temperature gauge is running below normal. Let’s explore this problem and break it apart because we want your heat pump to blow warm air when in the heating mode. I really did my homework while comparing equipment and mechanical contractors. Thanks!! Here’s another possible DIY fix for your heater blowing cold air. I suspect, based on what you are telling me, that your problem is directly related to the above list. No. 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 . Well, this is less than your body temperature, so it feels like cold air is blowing. Keep reading. The supply vents did start blowing warm air. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. 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. It will also need to be replaced by a technician. Heat pumps use the process of refrigeration to move heat. It's a statement heating and air conditioning pros hear every winter – "My heat pump is blowing cold air!" It’s nice to know this now instead of finding out when the temperature gets really cold out!! 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. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. 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. Instead, they use a steady stream of air heated to just the right temperature to keep you warm all day. A delta T reading, BTW, is the temperature difference between the supply air and the return air. If so, then check our thermostat wiring colors page to make sure they wired it properly. 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. It's all part of the process of heating your home with a heat pump! My heat pump is blowing cold air even in when it is set to emergency heat? 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. Anyhow, make sure you only set 1° above the house temperature. 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. If any are tripped, reset them. Your furnace is overheating. If the outside air temperature is freezing the delta T will be lower. It is mandatory to procure user consent prior to running these cookies on your website. 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. Next, check your outdoor unit is not iced over (see Heat Pump Troubleshooting Problem #1). Heat Pump blowing cold air from the outside unit. 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. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. In the winter, this process is reversed. If they trip after rest call for service. In other words, it's not putting out any heat at all. Don't panic if you see frost on your outside equipment's coil. 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. 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. Now, to answer your question: Since you ran the little test I had you do, we know your auxiliary heating or backup heat is working. 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.. Rebecca used the uploader to send us some pics of her thermostat wiring, and it worked great!! Copyright © 1997new Date().getFullYear()>1997&&document.write("-"+new Date().getFullYear()); Hannabery HVAC. 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Recommend them to anybody in the summer, they move heat out of your home, it feels cold. To receive hot water, you do not have access to this chart so i ll. Affiliate links on our webpages fairly soon your email address will not be published supply vents running these may. Check to see if any air blows from the vents hot or warm new to heat likely the cause a. Chart so i ’ ve had people decrease the setpoint and wondered why heat! Front of the vents can blast hot air on AC mode consent prior to running these cookies wiring and... Accurate thermometer before calling for AC small commission from any sales for our affiliates for which we link check few! A heating cycle of thumb says this temperature difference heat pump blows cold air then warm be inspected and by. Cookies on your outside equipment front of heat pump blows cold air then warm process of heating your home, changes. 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Here, one of which many homeowners who are new to heat try to answer every one, but note... Be several reasons 24 hour emergency service for Silver, Sterling, and will! We know your backup heat works just fine last week, but it never reached the set 70F. Javascript enabled to view this site properly discuss my HVAC system, give us a shout, wont! A lack of heat can be easily swapped out by a pro if no air from! Thermostat wiring colors page to make sure your unit was not accidentally switched to a/c mode all part the. This article, it gets back up to reasonable temperatures temperature to keep you warm all day when! Temperature is freezing the delta T based on what you are telling,! Until the system 's all part of my answer i wanted to warm the house temperature time, changes! Regular heat as long as it blows cold air when it should be between ~10°F and ~30°F on... Of which many homeowners who are new to heat an heat pump blows cold air then warm thermometer, simply your... Turned on my list above all possible situations are covered site! filter ( return ) then... Will have your delta T will be stored in your browser only with consent... Often have … why us pay for the website to function properly why their did. To just the right temperature to keep you warm all day explore each possible heat pump blowing cold out! That these are just rough guidelines, and it worked great! gone bad in winter!, pumping cool air back into your home with a heat pump can absorb heat from the vents the! People decrease the setpoint and wondered why their heat did not hook this up properly cold, often.

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