ENGINE A/C PROBLEM, NOT ALWAYS COOLING
We have a 2006 Coachmen Aurora Class A motor home with a Ford F53 chassis and a 6.8L V10 engine. We are having intermittent problems with the engine A/C system. We've evacuated the system (3 times),...
Forum Discussion
Make sure the heater control valve is properly closing off hot coolant to the heater core. If there is a vacuum leak the system would start blowing from the defrost outlet instead of the vent outlets when under low vaccum operation such as heavy acceleration.
