Here’s the background. The ACC Control Head does not work properly on my 1983 300D. BIG SURPRISE!!! If I disconnect the temperature amplifier control, my heat works great, I just have to adjust the blower speed by using the push buttons. I don’t mind at all. My air conditioner compressor will run continually unless I run the temperature wheel to max so I just put a switch in the power line so I can turn it on and off manually. Now, it is getting rather hot here in Georgia and I need my A/C to work. I trusted a Yahoo on ebay and bought a used ACC Control Head “that works just fine”. Yeah, in a parallel Universe! Anyway, I am pretty sure that if I can turn off the flow of hot water through the heater box inside the car, that my A/C will work just fine. The A/C does produce cold air, but the heater gets so hot that it blows very warm air. If I feel under the dash, I can feel COLD air coming from behind the glove box.

Finally a question, is there something I can unplug or disconnect that will stop the flow of hot water into the heater box, or will if hurt anything if I just put a shutoff valve in the hot water line right after the auxiliary water pump? I am also open to other ideas. I tried the soldering trick on the ACC but it didn’t seem to work.

I know it is sacrilege to some of ya’ll to not repair it properly, but I’d rather not waste any more money on iffy ACC control heads that may or may not work.

Thanks,

__________________
Wayne

the triumph of evil requires only that good men stand by and do nothing

13 Audi A3 TDI, the Wife's!
85 190D 5 speed, 195,000 miles
75 Triumph TR 6 w/Toyota 5 speed
2000 Ford F-250 powerstroke
03 Ml500, 109000