Mine also exhibited this errant behavior, so my "solution" was to tie system vacuum semi-permanently to the footwell vacuum pod. Works ok, until you need full defrost. I need to do some serious diagnostics this Fall/Winter, cuz I'm beyond tired of having a defective ACC.
Did I mention that I hate the ACC? On 10/28/05, Gabriel S. <[EMAIL PROTECTED]> wrote: Mine does this too, you have to buy the whole climate control unit. Casey Olympia, WA Biodiesel: '87 300TD intercooler (210k) '84 300D (205k) Gashuffer: '89 Vanagon Wolfsburg Edition (186K)