When I turn the key to ACC, my fan turns on. It is also always on when the car is running. Someone suggested to me that it could be the fan switch on the back of the block? Could that be, or could it be something different? Thanks...
Yes, it's probably the thermoswitch on the back of the block. It's two wires plugged onto a couple of prongs on the back of the block near the oil pressure switch. There is usually a big rubber boot covering the two wires.
I would disconnect the wires from the switch first and see if the fan still comes on. If it does, then you have an open or short in the circuit. If it doesn't, then you have a defective thermoswitch. The thermoswitch is only supposed to turn the fan on when it detects a certain temperature.
The fans aren't supposed to be able to come on until you switch the ignition to ON (the position just before start)... Do you mean ON or ACC?
Assuming you have one, your A/C switch isn't on, is it? The fans will come on if the A/C switch is on whether the A/C itself works or not.
It's on ACC. When I was testing out my CD player, I turned it to ACC and the fans came on. As for the AC being on, I can say I am almost positive that it isn't. I don't have it on because it doesn't work... :lol: