When the process fails, that’s when you get punched in the face by a fistful of hot air. If the refrigerant is restricted even slightly it can cause the expansion valve to get so cold that frost or ice collects on the exterior of the hardware. Your email address will not be published. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. This could help your mechanic to diagnose and fix the problem. Read on to learn about the most common causes of an AC blowing warm air, and which ones you may be able to tackle yourself. Let’s suppose that your AC stops working then what? The Causes Why Car AC not Blowing Cold Air When Idle? Electrical Issues He covers the topics that matter most to the consumer. You wait and wait, but it never gets cold. Any time a system in your car malfunctions or breaks it can be frustrating. While this setup and protective features help prevent dangerous fires from growing in the electrical system, it also means that something as simple as a blown fuse could cause your AC to stop working. What it does is absorb heat from inside your car and radiate or give off the heat outside the vehicle thereby making the interior cooler than the temperature outside. The compressor has not been operated for a long time which leads to giving its system a shock increasing in its failure. You need to consult the professional person who is an expert in the conditioning technician field. This list of car AC problems is by no means a comprehensive list of all the different things that could be responsible for your AC blowing hot air. There are a number of reasons but we are enlisting a few of them. Sometimes, car air conditioner blowing hot air instead of cold air. Your car AC blows warm on the inside but cold on the expansion valve. The chemical Freon or simply you can call it coolant is the reason why the AC cools hot air quickly. Unbearable, right? functioning well you look forward to taking a ride in the car, but if it starts Secondly, it permits the fluid to lower the temperature prior to conversion into the gaseous state while it passes through the other compartments of the AC system. The reason behind the refrigerant fluid taking the gaseous state is that it arrives in the less pressurized section or lesser resistant area where it shows its ability to take another form. are broken or frayed. see if there’s a broken fuse. is the period where you’re banking on your car AC to keep you comfortable as Uncomfortable driving conditions can distract, 6 Symptoms of a Bad Alternator [with Tutorials], How to Fix a Car That Shakes (Symptoms & Fixes). Meanwhile, the leakage leads to a lessening of pressure within the system, the fluid can easily take liquid form. A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. You could run it in the winter with the fan or air vent block, or maybe leave it on for some time before you lock the car and retire for the night. The Two Most Common Causes of Home AC Blowing Hot Air If you’re getting hot air, it usually means one of two things: There’s a problem with the compressor or the outside unit, or Your AC is low on refrigerant. Thus, it can be incurred anyplace in the pipes of the system. Posted on: January 24, 2017 by: Scott Geller. The most common causes when car AC is not blowing cold air are an empty AC system, faulty air compressor, faulty AC pressure switch, and a clogged cabin filter. Troubleshoot these common car air conditioning system problems. the heat will not be nullified from the compartments and will burn out in the passenger section. issue that might be affecting the performance of the compressor is the Now everything requires electricity to be operated. Furthermore, its absence can give a negative effect on the proper functioning of the AC. Recall There are two main issues in the condenser that can lead to a car AC system blowing hot air. The first leading cause of AC blowing in the lower level of refrigerant in the AC. 2) Dirty evaporator coil caused by a dirty air filter Chances are, your thermostat is set to cool, and you’re still getting hot air. A faulty compressor will definitely cause your car to blow warm air or—even worse—no air. With the advancement in the design and functioning of automobiles, the sources of its operation have changed so far. Like I already mentioned, the liquid refrigerant becomes gas when it leaks, so you won’t see the normal tell-tale puddle of water under the car, you’ll possibly see an oily substance collect around the area that’s leaking. There are any number of reasons cold air or no air is coming through the vents. The condenser is the part of the AC unit that’s responsible for radiating or dissipating the heat from the liquid refrigerant coming from the compressor. With most A/C problems, low Freon levels tend to be the primary problem the vehicle is having. I have to warn you, it’s quite difficult to locate or isolate the cause of an electrical problem without the proper test instruments and the necessary experience to diagnose such problems. The most common cause of compressor failure is inactivity – try to imagine a component that wants to work all the time or it fails. If you ’ ll go over the different why is my car ac blowing out hot air, reasons for malfunctions, and it is that! 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