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- - Electric fan problems (https://67-72chevytrucks.com/vboard/showthread.php?t=625810)

daveo68

04-20-2014 02:33 PM

Electric fan problems

Electric fan keeps cycling on and off. Stays on about a sec and off about a sec. Checked the fan motor, it runs when connected directly to battery. It was working fine 3 weeks ago. Maybe bad relay or controller. Supposed to turn on @ 185 and off @ 170. Also I have the probe in the radiator. Any ideas would be appreciated.

Wrenchbender Ret

04-20-2014 02:45 PM

Re: Electric fan problems

Most of those have a circuit breaker. It could be a faulty circuit breaker or the motor is creating an overload.

daveo68

04-21-2014 12:27 AM

Re: Electric fan problems

ttt

daveo68

04-22-2014 05:48 PM

Re: Electric fan problems

I ordered a 50 amp circuit breaker and relay, hopefully it will arrive tomorrow. If this doesn't work going back to manual fan. Thanks

Tkmadone

04-24-2014 01:43 PM

Re: Electric fan problems

Most likely it's the controller. I've had a couple of the thermal switches go bad over the years with similar results.

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