Why Won't My AC Blow Cold Air?

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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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YourMechanic AC is not working Inspection Service

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Number of Reviews

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Rating Summary
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Oreste

12 years of experience
117 reviews
Oreste
12 years of experience
Nissan Sentra - AC is not working - Miami, Florida
Oreste is extremely knowledgeable and professional. He fixed my car quickly and knew exactly what I was asking about and made me felt confident I was getting excellent service. He is a pleasure to work with and I highly recommend him!
Mini Cooper - AC is not working - Miami, Florida
Excellent mechanic , he know all abou the Minicooper engines , he fixed the fail and check all , he did a great job

Joe

41 years of experience
709 reviews
Joe
41 years of experience
BMW 740i - AC is not working - Saint Petersburg, Florida
Great guy. Knows his stuff and easy to work with. Very friendly and helpful. Knows BMW and that’s important to me. Highly recommend.
Honda Odyssey - AC is not working - Tampa, Florida
As expected - Joe was great. Insightful, helpful and explained everything. Will book again without hesitation.

Brian

21 years of experience
247 reviews
Brian
21 years of experience
Honda Odyssey - AC is not working - Jacksonville, Florida
Very knowledgeable and courteous. He was able to quickly diagnose the problem and tell us how to fix it! Thanks Brian!!
Nissan Rogue - AC is not working - Jacksonville, Florida
Amazing service!!! Brian was timely, professional, informative, and this service is just SO convenient. This was my 2nd time booking with Brian via Yourmechanic.com and it wont be my last!!

Benji

20 years of experience
71 reviews
Benji
20 years of experience
Jeep Grand Cherokee - AC is not working - Paradise Valley, Arizona
Benji was beyond professional and handled our issue with speed. Super efficient and went above and beyond!
Land Rover Range Rover - AC is not working - Scottsdale, Arizona
Very knowledgeable! On time, kind, Courteous. Definitely a master technician. Identified the issue Immediately and resolved quickly! A pleasure to work with.

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