Heater Control

How to make the heater control switch to change in my 1988 Chrysler Fifth Avenue?

I can’t get the heater controls to switch from the windshield to the vents or floor. All it does is blow at the windshield. I replaced the control switch and vacuum hoses inside the car. Still nothing. What could be wrong?

The air actuator doors are vacuum controlled. Defrost is the default setting meaning if there is no vacuum this is how it operates..Look under hood for broken vacuum line near firewall or heater hoses . The sticker with your engine info (usually on hood) may be helpful for tracing the vacuum line .
Also check vacuum canister.

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Tags: automation, control, energy, heater, heating