Thanks for the advice.
There are two boxes attached to the underside of the dash, one is silver and one is black. The silver one is the temp. controller part no. 1147328026 but I am not sure what the other black box does, is this the amplifier? How do I know which if any is bad? The blower worked when I first started the car today. But it only works if I have the defrost vent on with either the black fan or white fan selected or with the white fan selected and any other vent combination. The heat is lukewarm at best which makes me think that the vent to the heater core may not be opening fully or maybe the core is clogged. I can hear the electric water pump going but I don't know if it is pumping fully.
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