F350 Super Duty 2003 Air Conditoner Cuts Off
 

I have an 03 F350 Super Duty with the 6.0 Diesel Engine. The truck has given no problems until now. (130,000) Miles. After a few minutes the A/C starts blowing Hot Air. I can pull the A/C Fan Contol Fuse and Breaker and it starts back up. Sometimes if I use the towing button on the shifter it has no problems. I believe it has something to do with the engine fan which is electric on this model but do not know if it is the sensor or the fan and need to find where the sensor is located.
Open to all suggestions. Replies Welcome