Skip the auto shop - Our mechanics make house calls

Q: Cooling Fans

asked by on

What would make the cooling fans only come on when the AC is turned on ?

My car has 137000 miles.
My car has an automatic transmission.

A: Most Vehicles now have 2 separate cooling f...

Most Vehicles now have 2 separate cooling fans. One cooling fan is intended to come on when the engine reaches a certain temperature. The other cooling fan is intended to come on when the air conditioning is turned on. When the air conditioning is turned on the fan kicks in to draw air through the condenser. When air is drawn through the condenser it promotes a good working air conditioning system. This is a normal operation of the vehicle and I would not be concerned with this as a problem.

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: Do I need to replace the timing chain tensioner cover gasket?

This would depend on the severity of the oil leak. If the oil leak is fast, I would recommend having this issue resolved as soon as possible to prevent any damage to your engine. The labor charges likely high due...

Q: Does our whole ABS system really need replacing?

Hi, thanks for writing in. In nearly 40 years of working on cars, and 30 years of anti-lock brake systems, I've never seen or heard of a single vehicle needing a "whole new ABS system" at one time, unless it...

Q: AC not working

Your air conditioning not working is most likely due to a low level of refrigerant in the system. When the pressure sensor in the system detects that the refrigerant is too low, it will shut the compressor off. Over time,...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...