Radiator fan runs continuously

BryonTheCanadian · Post by **BryonTheCanadian** » 23 Apr 2019, 11:23

Hi team my rad fan is now running on high from the second i switch on the car cold... If read it could be a defective part on the fan unit or high pressure switch on AC condenser... My Ac does not seem to be working so could be that.. Is there an easy way to disable the high pressure sensor to remove it from the equation? to see if its the Fan electronics... or other ideas B

Post by **RickHaleParker** » 23 Apr 2019, 11:40

BryonTheCanadian wrote: 23 Apr 2019, 11:23 Is there an easy way to disable the high pressure sensor to remove it from the equation?

1. Disconnect the wire to the A/C clutch so that it cannot be engaged.
2. Pull the wires on the A/C pressure switch and put a jumper across the two wires. 1/2 of a paper clip makes a good jumper.
3. Tape it so it does not get shorted.

If the fan runs correctly you found the source of the problem and can run this way until you get the A/C fixed.

cbova · Post by **cbova** » 28 Apr 2019, 18:35

Did you find a solution to this? Mine started doing the exact same thin last week. I'll start a new thread with what I've checked so far so not to hijack.

BryonTheCanadian · Post by **BryonTheCanadian** » 29 Apr 2019, 09:08

No have not checked much out. seems it could be 1 of two things either Fan switch or high pressure sensor on AC

BryonTheCanadian · Post by **BryonTheCanadian** » 29 Apr 2019, 09:09

RickHaleParker wrote: 23 Apr 2019, 11:40
BryonTheCanadian wrote: 23 Apr 2019, 11:23 Is there an easy way to disable the high pressure sensor to remove it from the equation?
1. Disconnect the wire to the A/C clutch so that it cannot be engaged.
2. Pull the wires on the A/C pressure switch and put a jumper across the two wires. 1/2 of a paper clip makes a good jumper.
3. Tape it so it does not get shorted.

If the fan runs correctly you found the source of the problem and can run this way until you get the A/C fixed.

Thanks Rick where would the AC pressure switch be located... Thanx