The air conditioner was blowing cool, not cold air. It was found to be low of gas and is now recharged. Tech then tested at idle and temperature was 5deg C coming out for vent. Once I started driving AC went cool again. When I stopped and sat at idle AC was cold again.
Seems that about 80kph (2600rpm) AC gets warmer. This is a T430 115 (Motorhome) and I am thinking there simply is not enough power for both driving and running the compressor. Is there a cutout on the compressor when under load? Perhaps warm air is being forced into the system at speed even though the AC is set to recirculate. Any thoughts would be greatly appreciated.