84 Interior Ventilation Controls
Thread Starter
Intermediate
Joined: May 2016
Posts: 42
Likes: 3
From: Virginia
84 Interior Ventilation Controls
Does anyone have a write up as to how the interior ventilation system works? NO matter how I set the controls for heat or air, I always get the ventilation through the defrost vent. I started taking the dash apart then decided to reach out before I went too far.
Any pointers?
Any pointers?
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
There is probably a vacuum leak in the engine compartment for hvac. It maybe on of the little black tubes broke on passenger side. Depending on whether you have C68 Auto or C60 manual vacuum control varies. Manual vacuum is controlled by valve on control head. Auto vacuum is controlled by programmer which directs air flow using sensors and input from control head. Defrost mode is a default because of lack of vacuum, the intent is to get windshield clear so car could be drive in acclimate weather
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Does anyone have a write up as to how the interior ventilation system works? NO matter how I set the controls for heat or air, I always get the ventilation through the defrost vent. I started taking the dash apart then decided to reach out before I went too far.
Any pointers?
Any pointers?
They're pretty cheap so you might want to just replace it.
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