Skip the auto shop - Our mechanics make house calls

Q: My AC is blowing hot air. No noises, but can not spin under the hood

asked by on

AC blowing hot air. Doesn't need refrigerant. No noises, but fan under hood doesn't spin when AC is turned on

My car has 65000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. I recommend chec...

Hi, thanks for writing in. I recommend checking the fuses and relays for the AC system and the auxiliary fan. The auxiliary fan is tied to the AC compressor, so when you turn on the AC from the dash controls, both the compressor and aux fan should come on. Both a low and high refrigerant level can cause a "no cooling" situation as well. With low refrigerant level, a sensor protects the compressor from coming on and damaging itself. With high refrigerant level, the compressor turns, but is less effective than it would be with the proper refrigerant level. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car keep stopping while driving the battery light comes on then it cuts right back on

This may suggest a failing voltage regulator. The voltage regulator is a unit that regulates the charging of the battery by the alternator. When the voltage regulator is not working properly, this may result in the alternator allowing too much...

Q: Removal of driver's seat positioning switch plastic cover.

Hi there. The best way to remove the position switch on the seat is to remove the bracket it mounts to on the seat rail. The bracket should have two fasteners that secure it to the seat rail. Make sure...

Q: Battery Light comes on and off

Hi there. Although it's nearly impossible to diagnose an electrical issue without physically inspecting the vehicle, it appears from here that you might have an exposed wire that is constantly drawing a current; which can cause serious damage to components...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.