Defroster help needed
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Junior Member
Joined: May 2014
Posts: 4
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From: Alaska
Car: 82 Z-28
Engine: tuned 305
Transmission: 4 speed
Defroster help needed
The HVAC selector lever will slidt from vent to heat, but will not move past heat to the defrost mode. Any ideas? Can this be a vacuum issue or is this mechanical?
Any help is appreciated.
Any help is appreciated.
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: Defroster help needed
I think you may have a bent cable.I had a similar problem like that and the cable had a bend in it.
Joined: Aug 1999
Posts: 5,266
Likes: 463
From: RI
Car: 1984 Camaro Berlinetta
Engine: LT1
Transmission: T56 6-speed
Axle/Gears: 4.11 LS1 Rear End
Re: Defroster help needed
If your car is non-AC,..... It's mechanical. If your car is AC than it's vacuum.
If non-AC then it could be a bent/broken cable.
If AC then it could be a vacuum problem at the heater controller vacuum line connection or the Defroster vacuum lines.
I've seen a dead mouse block a air diverter door from closing before so it MIGHT be a blockage of the diverter door inside the heaters internal air box too. ( weird stuff happens all the time !! )
If non-AC then it could be a bent/broken cable.
If AC then it could be a vacuum problem at the heater controller vacuum line connection or the Defroster vacuum lines.
I've seen a dead mouse block a air diverter door from closing before so it MIGHT be a blockage of the diverter door inside the heaters internal air box too. ( weird stuff happens all the time !! )
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