Mechanics

PONTIAC SUNFIRE AIR CONDITIONER PROBLEM

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
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CARLENEM
April 21, 2009.



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.

Thanks for using 2CarPros. Com!

Bluelightnin6
Apr 21, 2009.
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.

Tiny
CARLENEM
Apr 21, 2009.
Follow the link below to learn how to check a relay..

http://www.2carpros.com/how_to/how_do_i_check_a_relay.htm

Bluelightnin6
Apr 21, 2009.