1999 Pontiac Sunfire

1999 PONTIAC SUNFIRE
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CARLENEM
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Engine Cooling problem
1999 Pontiac Sunfire

why does the fan only work when the air conditioner is on? If you turn off ac it overheats
Apr 21, 2009 at 7:35 PM
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BLUELIGHTNIN6
  • CAR REPAIR CONTRIBUTOR
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First ensure coolant is at proper level in radiator. If OK, inspect cooling fan relay (located in underhood fuse/relay center). Let me know results and I will follow up..





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Apr 21, 2009 at 9:20 PM
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CARLENEM
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iI don't know how to check the relay to see if its good or not? The electic fan does come on, and the temp stays normal as long as you have the air conditioner on. As soon as you turn off the ac the fan doesn't come on any more. So, now what? Any kind of help would be appreciated.
Apr 21, 2009 at 11:09 PM
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BLUELIGHTNIN6
  • CAR REPAIR CONTRIBUTOR
  • 16,542 POSTS
Follow the link below to learn how to check a relay..


https://www.2carpros.com/how_to/how_do_i_check_a_relay.htm
Apr 21, 2009 at 11:16 PM
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