Hi all,
Haven't posted in a while, hope all of you are well!
I recently had my AC serviced on the '85 300D and it worked fine for a short drive around town yesterday. When I left my parents house for my drive home, whether I used Economy or AC, I only got max heat. I did try cycling the temperature wheel back and forth, as well as powering off the ACC then powering back on to no avail. The compressor is definitely engaging as I can feel the slightest hesitation in the car's power at speed. Thinking it was an electrical connection being faulty (these cars have their share of gremlins), I tried it again this morning and had the same problem. Thankfully my windows still work!
I've done my research and I believe the monovalve is the usual suspect here. However, I have some other questions while I source a replacement kit and the time to install it.
1.) If I were to disconnect the monovalve from the electrical system, would I be able to keep my in-dash ACC on MIN temperature setting and get AC or normal outside air on Economy?
2.) I've heard mixed reports on the auxillary water pump and I'm not convinced this is related, but I've heard disconnecting this might help. Can anyone confirm?
3.) There's only one type of monovalve repair kit available and it's not OEM. I'm positive that I used this brand several years ago to try and fix this issue, and it's looking like that it's resurfaced. Some have done a swap with a W124 monovalve housing since apparently that's a better design. Anyone accomplish this successfully and can attest to it?
Thanks in advance for all the advice and wisdom.
