Vacuum Solenoid Valve HVAC: Testing and Inspection

CHECKING
^ Start engine and let idle.
^ Switch A/C On.
^ Push fresh air/recir (REC) button:

- both indicator lamps light.
- fresh air/recirculation flap closes.
- heater valve closes.

^ If not:

- check voltage supply to the Two Way Valve using current flow diagram.
- check vacuum hose routing and operation of vacuum servos.