1986 300E
I recently replaced the water pump, belt, tensioner, thermostat, and related hoses. When the water pump failed the car got hot but did not boil over. After completing the work I have driven the car over 100 miles and it runs perfectly with the coolant temp reading normal.
However, I have found the climate control not working as it should. When I set the temp to full heat, I get heated air but the slightest adjustment from full heat provides cold air. I'm getting either full hot or full cold with nothing between. Is it possible something happened related to the climate control when the water pump failed?