Climate control question & searching forum

[Flyin4now]

I have not resoldered the CCU. The compressor works. With the temp dial set on MIN the system blows pretty cold. The minute I rotate the wheel, the center vents close and the system starts blowing really warm air. My aux water pump failed a while back and I just removed it and placed a short piece of metal tubing in the space.

[Flyin4now]

Anyone else have any insight/suggestions?

Thanks! (in advance)

[AMH]

Originally Posted by Flyin4now

I have not resoldered the CCU. The compressor works. With the temp dial set on MIN the system blows pretty cold. The minute I rotate the wheel, the center vents close and the system starts blowing really warm air. My aux water pump failed a while back and I just removed it and placed a short piece of metal tubing in the space.

Did the aux water pump lock up? If so, that would stress the CCU. From what you are describing, I would look at this thread here.................
http://w123maintenance.blogspot.com/2007/10/automatic-climate-control-unit-repair.html

If you ever decide to replace the aux water pump, protect the system with a one amp fuse mod................. (from a post I did last year)

Brown is ground, black is hot. You will need NAPA # 7823101 (Marine grade fuse holder) and a 7821042 one amp fuse. Splice the fuse holder into the black wire, if the pump does seize it will blow the fuse and not toast the CCU.

Another area that is often overlooked, while it may not apply to your problem is the inside temp sensor. Check the foam hose that runs from it to the blower motor. Iinside air is sucked in over the sensor thus affecting fan motor speed and temp control. I replaced mine with a piece of 1/2 water pipe insulation covered in black electrical tape.