Quote:
Originally Posted by compu_85
The aux fan should come on based on refrigerant temp, not coolant temp. One of the two switches on the receiver dryer triggers it.. I believe it is the one with the wires coming right out of it, not the one with the spade connectors. Sadly you have to discharge the system to change it.
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The aux fan is triggered by the Refrigerant Temperature Sensor, which screws into the drier and has two wires and spade connectors attached. The other sensor attached to the drier is the Hi/Low switch, which breaks the circuit when refrigerant pressures get too high (or low).
You don't have to discharge the system to change the temp. sensor, as it just threads into the drier housing. The pressure switch with the oring and two spade connectors sticking out is the one that needs discharging to change out.
I broke the temperature sensor while redoing my A/C two years ago. While I waited for a new one, I jumped the aux fan connections so the fan was always on in city driving.
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Evil Climate Control™!