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Why do the fans on a 97 Pontiac Trans Sport only come on after the coolant has started overheating?
Wiki User
∙ 12y ago
the fans shouldn't come on after it overheats. they should come on just after it reaches optimum running temperature.
if it didnt do this, it would never reach the correct running temperature, & continuously run cold, which becomes expensive on gas & hard on your engine.
the fans are switched by a temperature switch, usually located around the thermostat housing, this switches the fans on when the engine is getting too hot to run efficient & as the temperature cools, it switches them off again to keep the engine at its correct temperature
if your engine is Actually overheating before the fans kick in, then the switch is likely to be either faulty, or incorrect, & switching at a too higher temp.
Wiki User
∙ 12y ago
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