Last week the heater on my 1987 T & C wagon suddenly began blowing cold air when the temperature control was set to hot. I had a similar problem with a previous vehicle where the cable running to a flap that allowed hot air from the engine to enter the ventilation system had failed.
I later noticed that the engine was running hot.
The next day I noticed a very small puddle of dirty coolant mixture beneath the car. As it turned out the coolant/water level in the radiator was very low. Obviously I have some type of leak.
Anyway, when I replaced the coolant, the heat began working fine. Could someone explain the connection between the coolant level and the heater?
Thanks.
John