Vacuum Check Valve HVAC: Service and Repair

REMOVAL
The vehicle uses vacuum to operate the recirculation door. A vacuum check valve is connected to the brake booster vacuum supply. The check valve is used to stabilize the vacuum within the HVAC recirculation circuit whenever the vehicle is accelerating or engine vacuum varies due to operating conditions.

Vacuum Check Valve:

1. Disconnect the vacuum harness from the vacuum check valve.
2. Remove the vacuum check valve from the brake booster vacuum check valve.
3. Remove the vacuum check valve from the engine compartment.

INSTALLATION
1. Install the vacuum check valve onto the brake booster vacuum check valve. Ensure correct vacuum flow.
2. Connect the vacuum harness to the vacuum check valve.