Thanks for helping.
What is happening (or not) is the push buttons don't seem to respond. Heat IS going through the pipes (heater core), there is vacuum in the lines, but the control module doesn't direct air to the windshield, etc.
I just tried soldering the circuit board on the push button control module but it didn't seem to make any difference.
Now what ..... any suggestions?
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)