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1999 Pontiac Sunfire

Tiny
CARLENEM
  • MEMBER
  • 1999 PONTIAC SUNFIRE
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
Tuesday, April 21st, 2009 AT 7:35 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
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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Tuesday, April 21st, 2009 AT 9:20 PM
Tiny
CARLENEM
  • MEMBER
  • 2 POSTS
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.
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Tuesday, April 21st, 2009 AT 11:09 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 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
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Tuesday, April 21st, 2009 AT 11:16 PM

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