Hi,my 81 300TD has lots of heat. The fan blows hot air all the time and there is no monulation in the temperature. The only way to make it cooler is to turn it off. Does the infamous "monovalve" also govern how hot the air gets?
Also, I remember reading about a piece of foam tubing that exists in the cabin temerature sensor line.. about 2 feet from the sensor..behind the glove box. My car has none. Is that important in keeping the temperature moderate?
great service for all us wantabee mechanics