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View Full Version : Heat & A/C No Defrost


axlealex
04-17-2015, 05:51 PM
So I have no defrost. Have center console removed, made sure all vac hoses are conected right and nothing. When defrost is selected I have air coming out the foot well vents. Everything else is functioning properly. Does it have something to do with the actuator? 33931tOr is there something else up? Driving me nuts even though I don't need it out here in Vegas.
David T
04-17-2015, 08:55 PM
So I have no defrost. Have center console removed, made sure all vac hoses are conected right and nothing. When defrost is selected I have air coming out the foot well vents. Everything else is functioning properly. Does it have something to do with the actuator? 33931tOr is there something else up? Driving me nuts even though I don't need it out here in Vegas.

Get out your Workshop Manual and look at N:01:09, :08:15, and :09:05 Problems like this usually start with the Mode switch. Has it ever been rebuilt? Do you have vacuum on the switch? BTW you can only have vacuum when the motor is running.
axlealex
04-18-2015, 02:11 AM
Thanks for the reply. Pretty sure mode switch is still original unmodified. It's getting vacuum, all others working. Checked the repair Manual, and performed oops as stated. Still getting little to no air through defrost vents, just footwell. Don't hear any leaks and a/c compressor kicks on as normal. Just no air getting to window. Will keep at. Is there a way to know the interior doors are working?
djdogbone
04-18-2015, 02:52 PM
Then it must be the rubber piece inside the mode switch. They dry and crack. Order a rebuild kit from Dave. You'll be glad when you do.
axlealex
04-23-2015, 08:00 PM
I finally figured out what was wrong. So I order the mode switch rebuild as suggested and it didn't fix the problem. Well I don't need to worry about that for awhile. Out of frustration I started to open up the heating/ a/c unit to get to the flapper door and to my surprise it was stuck! Dislodged it and works as it should. I guess the heater core was replaced some time back and the tech must of hit it, along with striping screws and cutting up plastic. Problem solved, now the tedious task of putting it all back together.
Thanks for your guys input.
34081
Sorry. I don't know how to rotate pics.