QuestionQUESTION: Hello Kevin, I've just recently noticed that the fan doesn't turn on when the A/C is running. It has the viscous fan drive and it does run the fan up momentarily when the engine is first started but then backs down to a very slow spin and stays there. Engine always stays at 190F, except for this weekend when I replaced the water pump and neglected to purge the block of air. The engine temp was running a little high and it signaled the fan to run high which immediately brought the temp back down. It did this several times until I was able to purge and add more coolant, so I know the fan and drive work.
What could I check to make sure the A/C is signaling the fan correctly?
Thanks, - Alex
ANSWER: the viscus fan and the electric fan are 2 different things which one are u worried about?
The viscus one spins all the time at low speed when u drive it will slow down it is not needed as much.
The electrical fan only comes on when over the 220 temp or the ac is on.
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QUESTION: Well, I guess I didn't look closely enough at it or don't undestand it like I thoght I did. Do both the electric motor and the viscous drive operate the same fan? i suppose I'm concerned with the signal to the electric motor. It's not kicking on when the A/C is on. - Thanks, Alex
Answeru can not have an electric fan and a belt driven fan run on the same path they are separate and work at different times of each other.
So which fan is it that u are worried about does the ac not work when u are sitting still ? did u plug back the connector to the fan on the pass side of the fan shroud?
