The air conditioner on this vehicle uses a vacuum powered HVAC controls. A leak anywhere in the vacuum system can this symptom. One way to test for leaks is to apply low pressure air (10psi) into the system and listen for leaks. Leaks at the vacuum reservoir are common. So is the line to the air recirculation valve because it is close to the passengers right foot.

The air conditioner on this vehicle uses a vacuum powered HVAC controls. A leak anywhere in the vacuum system can cause this symptom. One way to test for leaks is to apply low pressure air (10psi) into the system and listen for leaks. Leaks at the vacuum reservoir are common. So is the line to the air recirculation valve because it is close to the passengers right foot.