C12 fan stays on.

I have a mbl c12 in a 9200 with a PDI program. The fan hub was rebuilt 8 months ago and doesn't leak. You can hear the air release and observe the fan locking when you turn off the key. Replaced the coolant sensor and the air valve actuator for the fan.

do you believe the ac high pressure switch is the problem? With a computer hooked up to the truck the fuel temp sensor seemed to be the only one not reading correctly, the truck was at 180* and fuel was at like 60*. The computer also says that the fan is on but won't say why. Thoughts?

 

If I replace the high pressure switch will I loose my a/c charge? I could just change them both as I did jump the wire on the harness and nothing happened. The ac does seem to cycle on and off though, but I might just be hearing the evap cyl.

 

High pressure switch is the red one near the compressor?

 

Okay thanks.

My fan switch on the dash doesn't do anything. Is there anything I can do to make this operational? It's a 9200 with a 70pin c12

 

Anybody have the part number for the jumper and high pressure switch?