Guest Posted March 22, 2004 Share Posted March 22, 2004 My a/c only blows through the defroster. I have a 90 coupe. anyone know the part or the part number to fix this problemBubba Link to comment Share on other sites More sharing options...
padgett Posted March 23, 2004 Share Posted March 23, 2004 Check the vaccuum hose from the top of the manifold by the throttle body running back under the dash. 8 of 10 times when everything comes out of the defrost duct this has gotten knocked off. Link to comment Share on other sites More sharing options...
Shelby Posted March 23, 2004 Share Posted March 23, 2004 Also Check the hard plastic tube inside the conduit that runs from the back of the engine to the HVAC controller . It gets brittle and small leak will not provide enough vacuum to operate the valves. It took me weeks to figure it out last summers. Link to comment Share on other sites More sharing options...
Guest wally888 Posted March 23, 2004 Share Posted March 23, 2004 I have read several situations like your's. Most had a vac. leak however mine and another had ruptured diaphram in the UP/Down door actuator. See diagram in FSM. Link to comment Share on other sites More sharing options...
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