Ok guys here is what I have e99 F-250. Freon is fully charged, at idle it only cools to about 75 degrees, and driving it cools to 50 degrees. Outside air temp is 93 degrees. Fan clutch works, high and low side pressures are good. Condensor and evaporator core are both clean. Any idea what is going on.

 

Check this out
https://www.ford-trucks.com/forums/5...ml#post4464164


SpringerPop's Compressor Clutch Air Gap

 

You might want to consider installing a valve in the heater hose to stop flow of hot water into the cab, in addition to setting the clutch air gap.

 

Good suggestion Neal.I have that and it works.

 

the clutch gap is correct, that is one of the first things I did this year as a preventitive check. the valve on the heater hose is a good idea, but does not explain the 25 degree difference from idle to driving.