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

1993 SATURN SL2
45,000 MILES • 4 CYL • 2WD • MANUAL
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MIKE4315
  • MEMBER
  • 3 POSTS
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?
Jun 22, 2010 at 1:23 PM
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SATURNTECH9
  • CAR REPAIR CONTRIBUTOR
  • 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.
Jan 12, 2019 at 12:26 PM
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