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The fan is connected to the ac circuit to move air through the condensor in front of the radiator when the ac is turned on . This is to stop high head pressures in the ac and prevent damage to the compressor. There may be a problem with a coolant sensor that is turning the fan on otherwise so run fault codes and see if anything comes up
Temperature sendin unit needs replaced it sends a signal to the dash for temp and also to the fan switch. The ac is turning on the fan because, when ac is on the car would run warmer, so the ac switch is also connected to the fan. Are you saying that the ac kicks on when iddling or that's the only time you can turn it on
WELL TURN ON AC MAX COLD HIGH TO SEE IF COOLANT FANS TURN ON.IF NOT YOUR REFRIGERANT SO LOW THAT THE AC REFRIGERANT PRESSURE SENSOR WONT CLOSE CIRCUIT TO TURN ON COOLING FANS.MEANING YOU NEED HAVE AC CHECKED AND CHARGED.ALSO CHECK COMPRESSOR FOR POWER IF NOT YOU HAVE BLOWED FUSE OR BAD RELAY.IF FUSE AND RELAY GOOD YOUR AC COMPRESSOR CLUTCH COIL OPEN OR THE AC CONTROL SWITCH IS BAD.IF COMPRESSOR IS RUNNING WHEN YOU TURN ON AC YOUR AIR TEMPERATURE ACTUATOR NOT WORKING.
The ac pump has a clutch coil,it is activated with the ac button,and then the middle of the pulley will turn this is the clutch,it only turns with the ac on,then when it is turned off,the pulley just turns not the whole clutch,so this is normal.
Turn your AC off.
Turn the car off
Crank the car
turn ac on drivers side to 60
passenger side to 90
wait 1 minute
turn AC off (very important)
turn car off
turn car back on
switch driver's side 90 passenger 60
wait one minute
turn AC off( very important)
turn car off
turn car on
AC 70 both sides
your ac should be blowing cold
If not, you have an expensive problem