Today the blower motor in our '85 300D worked intermittently, independent of anything I could do with the push button controls. Reading the long series of discussions about the blower and its controls gives me some ideas, but a diagram of the blower control circuit would be really helpful. For example, I read, or think I read, that the monovalve is involved and that there is a sensor somewhere in the coolant. Hum ... how many parts are there in the control circuit? It's an California model of 300D, by the way.

Thanks,

Phil