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・Fair and transparent pricing

Get a quote

What others are asking

Q: broken timing belt cost

Unfortunately Your Mechanic would not be able to supply a cost for timing belt replacement on this vehicle. The Nissan 3.0 ltr V6 is an interference engine. The valves and pistons occupy the same space. It is the function of...

Q: Car died after running the AC

Hi. Running the AC with the engine off will definitely drain your battery. Most automotive batteries are designed to last last about 3-5 years. Being that your vehicle is a 2002, it should be on its 3rd or 4th battery...

Q: A/C intermittently started turning off

Intermittent problems can be such a pain to diagnose, as the problem is not always present or reproducible. This system is controlled on and off by a refrigerant pressure switch that has been known to drive some Insight owners insane...

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...