I am having some issues with the CCU after burning two up I disconnected my AWP (Auxiliary Water Pump, its DEAD, DEAD, DEAD).
Rebuilt the Mono valve and it is working well.
Installed another used CCU and the heater blower(brand new after market) worked and also so did all the switches.
Drove around and the heater worked, but I noticed when the temp wheel moved cool air came from the heater vents.
Maybe it was trying to Automatic adjust to the new temp but I find that hard to believe.
On max heat it did fine, but anything off max heat got cold air through the heat vents.
When I got back to the house I decided to try to see if the recently recharged A/C was working.
I punched the full air out all vent button and rolled the temp wheel to max cool and everything went dead.
No blower on any setting or speed and the buttons didn't work either. Fearing another smoked CCU.
I pulled the CCU out and took it apart expecting to find burned traces.
There were none and the CCU is fine, but I did notice that this CCU is vastly different inside that the other two.
This CCU has only 5 relays inside instead of 6, and the traces are actually thick solder and not the sandwiched copper traces of the other two.
Also there is only one circuit board in it, not two, the part number on the box is the same.

I checked for burned out fuses and found none. Also the large separate fuse on the fender well is fine.

Now My dilemma is what is not allowing my heater fan motor to work I have replaced the heater relay and the temp relay, but they were used units as well.
Which of the Ice Cube relays are the A/C-heater relays.
I'm about at my wit's end on this.

Also where on a w126 380SE is the aspirator motor found? I have looked beside and behind the glove box to no avail. Is it in the heater assembly box?

Thanks in advance for any help. This is about the last little niggling thing to fix on this car.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.