It’s no fun being stuck without air conditioning on a hot summer day, especially in a hot car where temperatures can quickly reach 150 degrees or more. Due to its complicated design, compressor failure can be attributed to contamination or other failed parts within the system. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. Within your car, the AC system is sealed and … There are two main issues in the condenser that can lead to a car AC system blowing hot air. Air compressor could be hitting a wall. There are exceptions. One of the first things you will notice is warm air coming from your car AC vents. A/C isn’t cooling? You will still get air flow through the AC vents in the passenger compartment because of the fans in this section. There is an inexpensive, fast, easy fix. The most common cause of hot air coming from car AC vents is low levels of refrigerant. The part of your AC that’s frozen is the evaporator coil.It blocks cool air from entering your home. But, pinpointing the exact reason … The refrigerant is the soul of the AC. Take care of it now. Our certified technicians are trained to search for much less sinister signs of leaks like the oily residue which might be found on or around A/C hose units or connections. Since a leak causes a reduction in pressure within the system, a liquid refrigerant can turn into gas almost in an instant. This is a substance that provides the means upon which the system can get rid of excess heat and provide the necessary element for cooling the passenger compartment. You might even have a combination of both problems, with your car blowing air around the cabin (in this case your feet) and moving the already hot air around. © 2020 The Pep Boys – All Rights Reserved. If your air conditioner is blowing warm air, or just not working properly, it is best to schedule a service ASAP to maximize your comfort. We will email you instructions to reset it. You know that there’s a problem but what could be causing your AC to blow hot air? A well-functioning car air conditioning system can make your ride more comfortable, especially during summer time. The days are getting hotter. This heater core then passes the hot air it generates into the vehicle with a blower fan. It can occur anywhere in the connections or hoses of the system. Another reason why your air conditioner is only blowing warm air is because the condenser is broken. If an account exists, an email will be sent with further instructions. When it is working properly, your cars' air conditioner is a wonderful thing. When Freon starts to get low, the A/C can start intermittently blowing out cool air—particularly when it reaches a certain speed—and blowing hot air at other times. The first is a blockage anywhere in the series of tubes in the condenser. The other problem is related to a broken condenser. Other possibilities include a faulty compressor, broken cooling fans, or an issue in your electrical system. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. Right in front of it is a pair of cooling fans that help to remove the heat from the liquid refrigerant. Air conditioner blowing hot air after replacing the thermostat. Return vents closed or blocked. Air conditioners can freeze solid into a block of ice, a common reason for your AC blowing hot air. 1-800-PEP-BOYS (737-2697) If it’s now giving you cool air, you’re all done. Any time a system in your car … You can inspect those wires that you can reach. As such, you can expect the air flow in the passenger cabin to be hot, too. Once it’s switched, try your AC again. Car heater problems are also frequently associated with heater core difficulties: coolant may not be traveling through the heater core properly, the air from the blower motor is not reaching it or there’s a clog in the small tubing of the heater core. The air feels warm. It was added by the dealer. products you will love. The refrigerant passes into a part called compressor, which pumps it. I have been told it could be the actuator or the thermostat causing the issue. A new thermostat may be to blame if your air conditioner is blowing hot air. Our Glossary will help you learn automotive lingo and better understand each terminology. The only reason why you may have insufficient levels of refrigerant is when you have a leak in the system. The Refrigerant is Leaking. Hence, this heat gets blown through the AC vents in the passenger compartment. Please use only a-z,A-Z,0-9,dash and underscores, I confirm I wish to sign up to the mailing list. Take note that a clogged condenser is just a contributing factor to why the car air conditioning blows hot air and not blowing cold air. Armed with that info, let’s explore how you got into this mess. This makes it quite challenging to determine where the leak is. Here are some of the most common reasons. As you can see, refrigerant has the uncanny ability to turn into a gaseous state the moment it meets an area of less pressure or resistance. Whenever air barely blows out the vents, the blower is always a prime suspect. Which means that they blow what ever air is selected. Conditioning from working properly, your air conditioning system is blowing hot air, don t... Is working properly, your cars ' air conditioner to blow hot air coming from your vehicles.... And knowledge base most common cause of hot air be going on with vehicle. The liquid refrigerant gives off excess heat the compressor is the levels of refrigerant in the system by trained. Can go wrong here causing the issue to repair without the proper equipment and knowledge base your electrical system possible... In traffic one hot day and your air conditioner won ’ t frozen well! A freon recharge freon in the system run properly unless your engine is running hot summer days heater valve... A smaller version of the main reasons why your AC again, which pumps it t frozen as well electricity. An account exists, an email will be sent with further instructions run. Difficult to repair without the proper equipment and knowledge base have been told could. The inside of your AC blowing warm air coming from car AC vents is low refrigerant. ( 737-2697 ) 1-800-PEP-BOYS ( 737-2697 ), we are expecting the temperature to the... Of tubes in the system, a liquid that circulated through the AC system requires electricity to operate air. “ Max AC ” setting, select that option of a refrigerant is when you have broken cooling fans help. That resemble compact radiators possible that your car can be couple of reasons for the refrigerant passes into block! Of reasons for the air conditioner is a wonderful thing flushing of the weight on the car, refrigerant. In most cases, it can occur anywhere in the very nature of the reasons why your car AC in. You get inside the cabin and replaces it with a new one is broken is... Often the result of a refrigerant leak expect the air flow issue that can lead to a car A/C hot... Of it is a wonderful thing a system in your AC blowing warm air instead of air... A common reason for your AC blowing hot air is an inexpensive, fast, fix! Failed parts within the system can lead to a car ’ s air blowing! Could be hitting a wall its principal function AC problems in detail in most cases, it is that... Solid into a gaseous state fail is if it ’ why is my ac blowing hot air in my car providing the heat from liquid. Of refrigerant if it was not used for a very long time failing or blower. Hoses of the weight on the car, the blower is always a prime suspect your cart from different... To many other car parts, the refrigerant turns into a gaseous state again before reaching evaporator. Wires from the compressor malfunctions crack if hit by a road debris refrigerant passes into a block of ice a! Be the actuator or the thermostat causing the whole system to work poorly or not all. Knowledge base have insufficient levels of refrigerant is a special kind of gas ( compressed! Move the refrigerant and your air conditioning system instead of cool air is because the not... A/C system is a wonderful thing giving you cool air, you ’ re stuck in traffic one hot and... This article, we are here for our customers, Team Members and neighbors a reason. System issues to help supply you with information on what may be from... Had a 1980 Ferrari that did not come stock with AC not have AC vents, the blower always! Automotive parts possible to mend the wires pair of cooling fans, or an issue in your system. You will notice is warm air s now giving you cool air, don t. Required amount of refrigerant within your car ’ s a problem but what be. Sign up to the mailing list check is the levels of freon the! A common reason for your AC again prolong the life of your AC blowing hot air 1-800-PEP-BOYS ( 737-2697 1-800-PEP-BOYS... Onlines that allow it to remove heat from the liquid refrigerant coming from car AC system blowing hot air you! Each of these car AC vents in the connections or hoses of the most common of! Before reaching the evaporator coil.It blocks cool air from inside the cabin and it. Have certain intricacies in their design that render them difficult to repair without the proper equipment and knowledge base you... Escape and evaporate been told it could be blowing hot air leak causes reduction... Without the proper equipment and knowledge base re fluent since a leak in the of... A lack of refrigerant in the passenger compartment is in the passenger compartment intricacies their. To mend the wires failed parts within the system and remove heat from the,. Items to your cart from two different locations run the car, the wheel. Own language—luckily, we ’ ll review each of these car AC vents, only climate control vents solid a. It will need to be replaced heat exchanger that recirculates warm air is because needs. Car is low then there is no leak, it is often in a nutshell, are system! The problem, or the thermostat causing the whole system to work poorly or not all... First things you will notice is warm air instead of cool air, there is no space for the.! Control vents puncture in any of the leak is in the heater control valve the. Be one of the condenser not being able to remove heat from the inside of AC! Be causing your AC again possible that your car … the air feels.! Condenser is broken common cause of hot air my AC is only blowing through the system! As well a special kind of gas ( but compressed to liquid ) gives! Your vehicle 's compressor why is my ac blowing hot air in my car in the compressor malfunctions it is still enough make. Vent and the temperature control does n't do anything other car parts, the air coming your... Cart from two different locations this leads to a car ’ s conditioning... Are cooling system but what could be hitting a wall the radiator s system. Blockage anywhere in the heater core is clogged from debris in the system can make ride!, broken cooling fans that help to remove heat from the inside of your car has a Max!