On my 1999 Lincoln Town Car AC only blows through defroster and heater vents.

Asked by maxpowers447 Nov 22, 2015 at 10:56 PM about the 1999 Lincoln Town Car

Question type: Maintenance & Repair

After taking the dash out to replace the heater core air only blows through defroster and heater vents.Wont blow through upper AC vents?Cant figure out what I left undone or whats going on.Vacuum line?Electrical?Any ideas appreciated.

2 Answers

23,910

A vacuum operated mode door system that reverts to defrost ducts has lost vacuum. When other ducts also operate, it can be a two stage vac. operated door issue, or even a control vacuum switch issue. It's best to inspect your work to find it or get the service manual info and go step by step.

Did you figure it out? I have the same issue, after the blend for motor assembly was replaced and it worked for a while, then the compressor was replaced, worked for a while. So frustrating not to have it working properly, $2,000 later!

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