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-   -   Electric fan turning on and off (https://www.cherokeeforum.com/f2/electric-fan-turning-off-215935/)

Fiskdog 11-05-2015 08:21 AM

Electric fan turning on and off
 
I did some searching but can't find an answer. When I start my car and it is idling I hear something turn on in the engine bay for a few seconds and then turn off repeatedly. I believe its the electric fan but it keeps doing it constantly. Even after driving for a few minutes. Is that normal or should I be worried?

Thanks

Fred/N0AZZ 11-05-2015 08:40 AM

AC compressor most likely if it is on cool or heat it runs with both of them and noticeable when it coms on. Just get out and pop the hood and see what it is for sure.

Firestorm500 11-05-2015 09:28 AM

Yeah, sounds normal to me.

toasterknight 11-05-2015 12:06 PM

In my 99 the fan and ac clutch cycle together. Its on all the ac settings as well as defrost.

ehall 11-05-2015 03:07 PM

There's a temperature switch on the evaporator that turns the compressor off at 45f. When you run defrost in cold weather, the evap stays cold, so the compressor cycles frequently.

CCKen 11-05-2015 04:00 PM

Normal for a "CAR".

Fiskdog 11-05-2015 06:00 PM

Ok thanks "Ken" buy it cycled every 15 sec or so. Just doesn't sound right.

CCKen 11-05-2015 06:29 PM


Originally Posted by Fiskdog (Post 3166795)
Ok thanks "Ken" buy it cycled every 15 sec or so. Just doesn't sound right.

Is this with AC, defrost, or bi level turned on, or with the climate control mode selector off (O)?

CCKen 11-05-2015 06:47 PM

It could be a worn out mechanical fan clutch cycling. It will roar then go quiet, on and on.

I had a POS Hayden clutch do this to me. It even cycled on and off while I was driving down the road. It was so bad I thought my engine was throwing a seven. Installed a good clutch from NAPA and tossed the Hayden in the trash.


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