Hi everyone so my service truck is having some issues. 2011 3500 with a 6.0. The ac blows great at an idle, vents are responsive everything seems to work great. However when i start to pull a hill the air seems to fade away from the dash vents and goes to feet and defrost. Already replaces line going to vacuum reservoir and the 2 way check valve near the battery. Like i said the fan runs great and i have good airflow but its disapears when pulling a hill or when the engine is under a load. Any help would be great!

Adam

 

you still have a leak somewhere