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1993 Saturn SL2 Cooling fan does not start on it's own

Tiny
MIKE4315
  • MEMBER
  • 1993 SATURN SL2
  • 4 CYL
  • 2WD
  • MANUAL
  • 45,000 MILES
The fan does not turn on when the temperature guage goes beyond the half way point. The car overheats in stop and go traffic.
I can turn on the cooling fan by turning on the air conditioner.
The temperature guage works fine.
I checked the connector to the coolant temperature sensor - Got 5 volts, as advertised.
Replaced the temperature sensor (without checking it first).
Once the fan is turned on by starting the A/C, it will stay on until the temperature guage reads below the halfway point.
The problem still remains. Is it possible that the PCM needs to be reset? How can I do this?
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Tuesday, June 22nd, 2010 AT 1:23 PM

1 Reply

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
First of all on your model car the fan will not come on by itself until at least 3/4 on the gauge unless your car has something wrong with the gauge. Only the newer saturn's fan came on just over the 1/2 way mark. If your car over heat's in stop and go traffic and your cooling fan work's then I suspect you have a clogged up radiator fin's from sand fur bag etc not pulling enough air threw it. Or you have a missing air dam it's spring loaded and hang's down below your a/c condensor it directs air up into your radiator.
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Saturday, January 12th, 2019 AT 12:26 PM

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