Possible Causes
WARNING: This page is about a different car, the 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
- No vacuum to A/C control.
- A/C control leaks vacuum.
- Vacuum hose kinked or pinched.
- Air flow door binding or stuck.
- Vacuum control motor.
- A/C vacuum check valve.
- A/C vacuum reservoir tank and bracket.
- Vacuum actuator arm not connected to door crank.
- Heater control valve leaks vacuum.