Gus

I removed my rear blower unit and installed a heater bypass pipe . After install and disconnecting all wiring to the blower and the other elements attached I noticed that the interior will only work with the AC on or with temperature control at the full left position. Once you rotate the temperature **** to get heat in the cockpit the interior blower will stop running.
Is there a electrical connection that I need to complete or make a by pass for in the area of the rear blower to get the interior fan to work. Without the interior blower there is very little warm air that comes into the cockpit area -
Has anyone figured this out ??

Hoosier_Daddy

Gus ... try a search for "bypass" or "heater bypass" and look for a couple of very recent threads. There appears to be a fix if you have the later 964.

You might be SOL with the '91...

HD

joey bagadonuts

Here's the Bill Gregory article on heater blower bypass installation.

Gus

HD / Joey - Thanks greatly for the leads and Info -
Looks like I have a viable solution - Greatly appreciate the feed back -