i know this an old issue but i have an 83 porsche 944.....but i cannot find the lever your all talking about???ive looked and looked....but i cant find it i removed the glove compartment and i saw the valve that opens and closes so when i turn on the a/c it closes but when i turn it off it opens back up????help me please!!!!!!!i already went to clarksgarage....and he talks about a 85 and up......!!!!!

 

yep...sounds like theflappernot closingis exactly what it is. Had the same exact problem out of my 84 944 when i had it