Hot air coming from your car AC vents can mean that you have low levels of refrigerant. Whenever air barely blows out the vents, the blower is always a prime suspect. If the heater control valve is the culprit, the air coming into your vehicle won’t feel warm. products! products you will love. 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. Other potential causes of a problem in the cooling fan are a blown fuse and some other electrical problem. 1-800-PEP-BOYS (737-2697), We are here for our customers, Team Members and neighbors. Because of the weight on the car, the compressor malfunctions. Within your car, the AC system is sealed and … 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. The best setting for diagnosis is “fresh air” (not recirculated) with the air blowing out of the center vents in the dash and the AC turned on. There can be couple of reasons for the air conditioner to blow hot air. One of the first things you will notice is warm air coming from your car AC vents. If there is no leak, it is still possible to break the condenser altogether. Due to its complicated design, compressor failure can be attributed to contamination or other failed parts within the system. 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. Learn how your comment data is processed. The A/C system in your car has a maze of wires complete with fuses, relays and pressure switches that work in unison to provide safe operation under normal operating conditions. If it’s now giving you cool air, you’re all done. 3. Air conditioners can freeze solid into a block of ice, a common reason for your AC blowing hot air. The most common cause of hot air coming from car AC vents is low levels of refrigerant. We are unable to add items to your cart from two different locations. If this doesn’t solve the problem, then having an auto electrician identify the electrical issue can help. The compressor is the heart of your vehicle's air conditioning system. A car A/C blowing hot air is often the result of a refrigerant leak. Would you still like to change your location? Your car AC is actually a heat exchanger that recirculates warm air from inside the cabin and replaces it with cold air. They can crack if hit by a road debris. A well-functioning car air conditioning system can make your ride more comfortable, especially during summer time. Heater cores, in a nutshell, are cooling system parts that resemble compact radiators. Symptoms of a Bad or Failing AC Pressure Switch, The Best Cabin Air Filters (Review) in 2020, The Best Car Air Fresheners (Review) in 2020, Help us to show you The fans could actually be broken, like a burnt out motor, bad mount a chipped fan blade, or they could simply have an electrical problem like a blown fuse or burnt out relay. You will still get air flow through the AC vents in the passenger compartment because of the fans in this section. Kitchenistic helps you find the latest and gratest You probably just need to recharge your a/c. There is an inexpensive, fast, easy fix. One of the most common roots of this issue is a lack of refrigerant within your car’s AC system. Hot liquid refrigerant stays hot. Take care of it now. 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. There are some things that you can do to help prolong the life of your vehicle's compressor. Here’s another air flow issue that can result in your AC blowing warm air. The most common cause of an AC system blowing warm air is a lack of refrigerant, though, you may also have a problem with your condenser. The problem is that it is not always easy to diagnose an electrical problem. Hence, only a professional car air conditioning technician can help solve the problem. Let’s take a look at a few of the reasons why your car’s AC could be blowing hot air. Therefore, it is possible that your car is low on refrigerant that is preventing your air conditioning from working properly. Questions? Addressing blockage often requires flushing of the system by a trained AC technician. The heater core is clogged from debris in the cooling system. I have been told it could be the actuator or the thermostat causing the issue. This is easy to in most modern vehicles since they utilize the compressor when the defroster, which is used year round, is activated. We mentioned above that the condenser often has a pair of cooling fans in front that aid in the removal of heat from the liquid refrigerant. How did that happen? As such, you can expect the air flow in the passenger cabin to be hot, too. Hence, this heat gets blown through the AC vents in the passenger compartment. If there are signs of damage, it is possible to mend the wires. Armed with that info, let’s explore how you got into this mess. For example, before you go tearing apart the ventilation system in your car, it can be smart to check the AC lines under the hood. Another way is to stop in to Pep Boys for a FREE A/C Quick Check (not available in the state of California) and an associate can give a visual inspection of the compressor to ensure that everything looks in order. Why is Your Car AC Blowing Hot air? Car is its own language—luckily, we’re fluent. Considered as the heart of the modern car AC system, the compressor is what drives the refrigerant throughout the series of tubes, hoses, and interconnected devices. Air Conditioner Freezing. 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. The only recourse for cracked cooling fans is to replace it. The motor is what’s providing the heat if the fan isn’t frozen as well. 6 Reasons Why Your Car’s Air Conditioner Might Be Blowing Hot Air. In fact, here in Columbia, MD we are expecting the temperature to hit the 90’s this week. If your air conditioner is blowing warm air, or just not working properly, it is best to schedule service ASAP to maximize your comfort. The air feels warm. The main problem is a refrigerant leak in which you need to replenish the system with enough amount of refrigerant after the leak is repaired. When it isn’t, driving in your car can be uncomfortable, especially on hot summer days. Air compressor could be hitting a wall. The point is that ordinary vehicle owners will have a hard time determining the exact location of the leak. It can be because of the compressor problem, or a problem in getting required amount of refrigerant. The refrigerant is the soul of the AC. A/C isn’t cooling? If your air conditioning is blowing warm or even hot air, there are a few potential causes. Refrigerant is a liquid that circulates through your car’s A/C system, expanding and contracting as it removes heat and humidity from the cabin. Other possibilities include a faulty compressor, broken cooling fans, or an issue in your electrical system. Air conditioner blowing hot air after replacing the thermostat. Your passengers will thank you! Which means that they blow what ever air is selected. If there is insufficient refrigerant circulating in the car AC system, then it will not be able to get rid of the excess heat. Start with the fan speed turned to its highest setting. If an account exists, an email will be sent with further instructions. Right in front of it is a pair of cooling fans that help to remove the heat from the liquid refrigerant. You know that there’s a problem but what could be causing your AC to blow hot air? If the refrigerant level is low then there is a leak that needs to be addressed. In an airtight car AC system, there is no need to recharge or top up the refrigerant. Any degree of blockage in the system can lead to the condenser not being able to execute its principal function. Its function is to circulate refrigerant through a series of Onlines that allow it to remove heat from your vehicles cabin. The condenser looks like a smaller version of the radiator. First, make sure to run the compressor for about 10 minutes once a month in the off season, regardless of the temperature outside. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. It was added by the dealer. Reasons Why Your AC Is Blowing Warm Air. A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. It can also occur in the compressor, the condenser, or the evaporator. It is still enough to make you sweat, nevertheless. It can occur anywhere in the connections or hoses of the system. A car’s a/c system is a sealed system. In particular, the blower motor may be failing or the blower wheel may be slipping from the blower motor shaft. Thankfully, in this article, we’ll review each of these car AC problems in detail. When it is working properly, your cars' air conditioner is a wonderful thing. Related article: Why and how to change an air filter. This is often the case. Your air conditioning system uses a refrigerant, a compressor, an expansion valve and two heat exchangers to manage air flow and cool the air inside the cabin of your vehicle. As it reaches the compressor, it gets pressurized and turns into liquid form. It’s that time of year again. If your car has a “Max AC” setting, select that option. Troubleshoot these common car air conditioning system problems. Return vents closed or blocked. Similar to many other car parts, the compressor can wear out over time. © 2020 The Pep Boys – All Rights Reserved. The refrigerant passes into a part called compressor, which pumps it. On top of that, there are certain environmental concerns involved with refrigerant that require special attention. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … Cooling fans are not the sturdiest components in a modern vehicle. This heater core then passes the hot air it generates into the vehicle with a blower fan. The air conditioner won’t run properly unless your engine is running. Your AC Refrigerant is Leaking If your car AC is blowing hot air, it is very likely that the refrigerant in the unit is low. But, pinpointing the exact reason … Your air conditioner is great—when it’s working well. The primary reason for which car ac is blowing hot air is when the air conditioner of the car is on it draws a load of power from the engine of the car. First, don’t panic. The heater core may also leak coolant. When there isn’t enough freon, the air conditioner’s clucth won’t come on, which will also affect the compressor from cycling. We've identified three common A/C System issues to help supply you with information on what may be going on with your vehicle. Firstly, your air compressor could be hitting a wall. The Best Car AC Refrigerants (Review) in 2020. Yet the problems that can cause an auto AC to perform in such a way tend to be the same problems. One of the main reasons why a compressor may fail is if it was not used for a very long time. The air you get inside the car is not as hot as a faulty condenser, however. A refrigerant leak is unique in the sense that refrigerant evaporates instantly into a gas once it isn't under the pressure of your closed loop A/C system. Any time a system in your car … Call 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. Whether it’s in your house or car, when you’re ready for the cool refreshing AC, hot air blowing in your face can be unbelievably frustrating. 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. It was blowing cold just yesterday! We have just sent you an email. Low Refrigerant Levels The most common cause of hot air coming from car AC vents is low levels of refrigerant. In most cases, it's due to a loss of refrigerant in the system. Having your car air conditioner blowing hot air can be one of the most frustrating problems to have. Like having a blocked condenser, having broken cooling fans can cause a lack of cooling at your condenser and could cause your car AC blowing hot air. The first reason why your AC isn’t blowing cool air is because it needs a freon recharge. I'd guess that the AC is screwed up, if it does that, or else there's some little switch or the thermostat is messed up that is telling the heater to turn on instead of the AC. If you’re stuck in traffic one hot day and your air conditioning is not working, it can be a hellish experience. From here, the refrigerant turns into a gaseous state again before reaching the evaporator. You can inspect those wires that you can reach. If the condenser is already broken, there is nothing left to do than to replace it with a new one. Automotive A/C systems have certain intricacies in their design that render them difficult to repair without the proper equipment and knowledge base. 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. If you believe your AC is having issues, bring your car in to a trained and experienced auto repair technician to diagnose what exactly is behind your cooling woes. Refrigerant is a liquid that circulated through the AC system and remove heat from the inside of your car. 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. The Refrigerant is Leaking. 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