Why Won't My AC Blow Cold Air?

When you turn on the air conditioner in your car, you expect to receive a flow of fresh, cold air. However, that’s not always what happens. A number of different problems can prevent your AC from blowing cold air into the cabin, and some are more serious than others.

Potential causes of hot air

As mentioned, there are many potential causes for your AC to blow warm or hot air into the cabin rather than cold, fresh air. These include:

  • Low Refrigerant: Low refrigerant will prevent your air conditioner from operating (the clutch won’t kick in and make the compressor cycle if the amount of pressure in the system is off). This is actually the single most common problem for an AC not to blow cold. Low refrigerant can stem from a number of things, including leaks and failed components.

  • Bad Clutch Cycling Switch: If the clutch cycling switch has failed, then the electromagnetic clutch on the air compressor won’t kick in, which means that the refrigerant cannot be pressurized and the system won’t work.

  • Blocked or Broken Condenser: The condenser is where the magic happens in your air conditioner and if it has been blocked up with debris or is damaged, you won’t get cold or even cool air from the system.

  • Restrictions in the System: What happens when you kink your garden hose? The water won’t flow, right? The same is true for your car’s AC system. If there’s a restriction somewhere in the system, it blocks it all up and prevents the AC from blowing cold.

While there are several potential issues, the most common is low refrigerant. The level of refrigerant in your system decreases naturally over time (very, very slowly), but leaks can also occur. If your AC isn’t blowing cold, it must be serviced by a licensed mechanic certified for HVAC (Heating, Ventilation, and Air Conditioning) work.


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Jeremy

20 years of experience
436 reviews
Jeremy
20 years of experience
Toyota Tundra - AC is not working - West Palm Beach, Florida
Jeremy was awesome. What a great experience. I will definitely use this service again. Thank you so much
Dodge Grand Caravan - AC is not working - Boynton Beach, Florida
Jeremy is a very nice guy, immediately gets to work and resolve the issues. This is the second time he’s worked on vehicles for me and each time was an excellent experience. Highly recommend him

Peter

25 years of experience
430 reviews
Peter
25 years of experience
Scion xA - AC is not working Inspection - West Hills, California
Peter has an awesome personality. Very knowledgeable and friendly. Definitely no BS from him. Very honest.... Will I use him again? Definitely. Will I refer him? Absolutely! Thank you Peter!
Mercedes-Benz ML500 - AC is not working Inspection - Reseda, California
Peter took his Time to check out and diagnose my vehicles problem. I was able to add some Freon and the cooling system is most definitely getting colder. I’m gonna drive it for the next few days as recommended and see where I’m at and go from there. Thank you for your time Peter

Matthew

33 years of experience
1017 reviews
Matthew
33 years of experience
Acura RDX - AC is not working - Newport News, Virginia
Matt is always so pleasant to work with. I appreciate his knowledge and attention to detail with my car. Thank you Matt!
Chevrolet Impala - AC is not working - Newport News, Virginia
Matt was on time and during the discussion with him he showed a great deal of knowledge about my a/c issue. I book this repair this weekend and look forward to Matt repairing my car. Thank you Matt

Bryant

12 years of experience
509 reviews
Bryant
12 years of experience
Jeep Patriot - AC is not working - Indianapolis, Indiana
Always great service with Bryant, he explains all he is doing as well as what else needs to be complete. I will be scheduling my next visit from him soon.
Ford Expedition - AC is not working - Indianapolis, Indiana
Second time using Bryant and he was, in both instances, able to diagnose and locate the problem. What I find particularly great is that both issues were very easy and inexpensive fixes. Bryant was very candid about the problem and offered to show me how to fix the issue if I wanted to do it myself. I just had him make the repair, which was done quickly. He also found an alternative part that saved me from having to order it online and wait a few days for the repair to be made. Bottom line, Bryant does what’s right and is honest about what the problem is. Anyone could have told me its a $1,200 repair and I wouldn’t have known differently. Use Bryant if you want honesty and great work.

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