Strange air con problem - Rennlist Discussion Forums
Maybe the diverter flap is shot. Have you ever had black foam bits fly out of the vents? Even if not this DIY shows a way to look at it from the trunk.
If so there is a good DIY on Renntech
http://www.renntech.org/forums/tutor...the-procedure/
"The flap/door that controls the regulation of air between the AC evaporator and
heater core is a piece of galvanized metal with large holes in it. Then it is covered in
foam...." "the foam coming out of the air ducts in fact comes from the flap/door for the
temperature mix. Mine was 90% gone. Therefore the door was a piece of swiss cheese
with large holes and useless for controlling air flow between the hot and cold sides.
Turning on the AC or heat allowed air to travel right through the door and the door
was basically ineffective. Why I didn't have AC issues this summer is unknown but I'm
sure my fix will have me impressed next summer! If you are losing foam in large
quantities I bet you have lost your heating or cooling efficiency...or you may not know
it yet due to current ambient temps!"