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Cooling fans don't come on

Tiny
SMILEY636
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
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
Monday, February 28th, 2011 AT 6:42 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
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?
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Tuesday, March 1st, 2011 AT 9:12 PM
Tiny
SMILEY636
  • MEMBER
  • 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
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Tuesday, March 1st, 2011 AT 11:29 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the temp reading? Maybe air in the cooling system? Was it overheating before you changed the radiator?
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Wednesday, March 2nd, 2011 AT 3:48 PM
Tiny
SMILEY636
  • MEMBER
  • 5 POSTS
The temp goes up and down and it was overheating before I changed the radiator
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Thursday, March 3rd, 2011 AT 2:44 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the actual temp reading? Some fans won't come on till 220 degrees or better.
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Thursday, March 3rd, 2011 AT 3:54 PM

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