I have been experiencing and living with climate control issues for years in my 190 D 2.5 Turbo.

I have multiple CCU "head units", all of which display some type of peculiarity. (only scorching hot, only freezing cold, improper vent controls, etc).

I'm in the mood to make this system work the way it was designed. I'm not afraid of pulling the dash if needed, or repairing/replacing whatever components need to be fixed.

I figured that I had better start with a head unit that works properly, before moving onto the electrical/vacuum solenoid manifold and the flap acutators.

Anyway, I took the bottom cover off one of the CCU units today, and inspected the solder joints under a stereo microscope. I found one connection that was clearly cracked, so I resoldered it.

It seems to me, that at one time, I saw an online tutorial showing the common connections which go bad on these units, but I can't find it now.

I also thought there was a guy who would essentially rebuild the head units for customers who sent their units to him. I can't find any of these resources now.

Can anyone help with a link to a tutorial specifically geared towards the "head unit" rebuild, or contact information to the guy who was rebuilding these things?

Steve.

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'93 190E/D 2.5 Turbodiesel 5-speed (daily driver)
'87 190D 2.5 Turbo rustbucket - parts car
'84 Dodge Rampage diesel - Land Speed Record Holder
'13 Ram 2500 Diesel
'05 Toyota 4Runner