Skip the auto shop - Our mechanics make house calls

Q: Cooling fan kicks off when the AC is on, on a 2000 Cherokee XJ

asked by on

I have a 2000 Cherokee XJ. The cooling fan kicks off and on about every 30 seconds, when the AC is on. Is that normal? Or should it kick off when the cooling is at the acceptable temperature and then kick back when the temperature goes back up?

No, it is not normal. They shouldn’t cycle that fast. When the fan is on, the fans generally run as long as the compressor is running. So, if you live in an area where it’s really hot like Arizona, you might find that those fans are running the whole time but they shouldn’t kick on and off.

Yours is kicking on and off a lot. What you’d want to do is watch your AC compressor and if you see the fans kicking on and off and if you see the compressor kicking on and off, you’ve got an air conditioning problem. That’s often because it is either low on refrigerant or there is a restriction in the system, and then when there is a restriction in the system, the pressure builds up and the pressure switch turns the compressor off and the compressor and the fan go off. Then, as the pressure goes down, it turns it back on and then the fans come on. But, then the pressure builds up and it turns it off. So, you’d want to check that. You probably have a problem in the AC system. If you want to have this verified by a certified technician, a mechanic such as one from YourMechanic, can come to your home or office to inspect your AC system.

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

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: Brakes

In normal operation, brake fluid will be drawn down in the master cylinder, over time, as the brake pads wear. As the pads wear, the caliper piston has to move further out in its cylinder and the resulting void fills...

Q: No cooling, advised changing compressor. System is 3 years old - should it go bad so quickly ?

Unfortunately it is not unheard of for R134 converted vehicles to go through compressors more frequently. R134 requires higher running pressures than R12 did. Two things to make sure of this time around for longer compressor life. Make sure...

Q: AC clutch fan relationship

The fan is kinda related, in that it is needed and commanded by the AC system to help cool the hot condenser. Its electrical circuit is separate from the AC electrical circuits. Definitely check the fuses first, then check...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.