Erratic Function Mode Selection
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, 1995 Ford Cab & Chassis, and 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
- Check for vacuum source at engine manifold and vacuum canister. Ensure check valve is installed correctly. Check for leak at vacuum controller. Ensure all vacuum hoses are correctly routed and connections are tight.
- Check vacuum motors and vacuum hoses for leaks and collapse. Check all mode doors for binding and foreign material. Check blower motor for foreign material and binding.