On my 85 SD, it warms up just fine, but the climate control will not deliver any amount of hot air to the car until I stop the car, and turn it off for a second. Immediately upon restarting the car, the heater will blast me out. This is all well and good, but very dangerous on a freeway.
I was told to check the monovalve, located on the firewall. Exactly what does it look like. There is a rectangular metal can with a connector sort of dead center and a smaller device between it and the battery. Suggestions would be welcomed.