Climate control unit quick fix

[DieselJim]

My fan wasn't working on my 85 300SD. After reading around here I finally pulled my new CCU I bought that shortly failed after I purchased it. The plastic was deformed in the same place. Burnt circuit board. So I finally unhooked the Auxillary water pump ( unplugged by battery). I pulled the plastic top and soldered a 22 gauge(insulated) copper wire between the two solder points that spanned the burnt strip. Put it back in and I have A/C. Planning on picking up a junk CCU and refurbish as a permanent solution. I am also going to refurbish the a/c and bring it back to r-12 with a new drier and add the missing switch on the drier that turns on the fan. I just got my 609 cert and waiting for the certificate. I didn't want to use my social. Paranoia.

[Fuzzball]

Jim,

Can you give a little more detail about what wasn't working and why this fixed it?

Also, do you have any pictures?

I'd love to get a better understanding.

By the way, what's an aux. water pump? (yep, pretty ignorant on this end).

Thanks

[rg2098]

The aux. water pump circulates coolant to the heater core. On W123's it located behind the passanger side head light assembly. It has 1 electrical plug and a coolant line connected to each end.