Now I have a heater problem!
 

First, I did perform a search but could not find the same symptoms in the archives. My car's an '84 300sd. My blower only works when the temperature wheel is set to a cold setting. When I turn the on the heat, the blower will not turn on. It does not sound like a monovalve problem as I can feel warm air wafting through the vents, it's just the fact that the blower doesn't turn on. My climate control works fine on the cold settings.

Thanks

Hi
Most likely you have a problem with the push button unit.
Does the blower work on "DEF" ?

Now it gets even more wierd
 

Driving around, I jiggled the keys and the heater system came back to life. I ran to Hollywood Video, picked up some movies, got back in the car and now the heater will not work again (even when messing around with the key). The fuses are fine as well.