hot air with heater off

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  #1  
Old 05-09-02, 11:35 AM
Jim Borkowski
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hot air with heater off

I have a 1988 Porsche 944 non-turbo. Recently hot air blows thru the vents on heavy acceleration even when the temperature setting is off. Under normal driving cool air returns. It is especially apparent when in a higher gear trying to accelerate onto an expressway. Otherwise the engine cooling system and engine performance appear normal
 
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  #2  
Old 05-09-02, 12:39 PM
Joe_F
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Check for problems with the blend door/HVAC system.

Get a vacuum schematic from Porsche (it's not likely to have it in my signature file below) and test the system.

I recommend you get a schematic from Alldata.com. It's a 25 dollar yearly fee. Well worth it.
 
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