cooling fans don't come on

1999 PONTIAC GRAND PRIX
6 CYL • FWD • AUTOMATIC
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SMILEY636
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  • 5 POSTS
my cooling fans don't come on I've changed the water pump thermostat i've hotwired the fans to see if they work and they come on what could be the problem
Feb 28, 2011 at 6:42 PM
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JDL
  • ✓ASE Certified Mechanic
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Any applicable trouble codes? Does the fan come on when you turn on ac? The coolant temp sensor could cause an issue or wiring circuit, somewhere. Does the vehicle overheat?
Mar 1, 2011 at 9:12 PM
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SMILEY636
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  • 5 POSTS
yes the fans come on sometimes when i turn on the ac I just changed the coolant temp sensor on the motor and my car is overheating and i 've changed the radiator
Mar 1, 2011 at 11:29 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
What is the temp reading? Maybe air in the cooling system? Was it overheating before you changed the radiator?
Mar 2, 2011 at 3:48 PM
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SMILEY636
  • MEMBER
  • 5 POSTS
the temp goes up and down and it was overheating before i changed the radiator
Mar 3, 2011 at 2:44 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
What is the actual temp reading? Some fans won't come on till 220 degrees or better.
Mar 3, 2011 at 3:54 PM
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