I have checked the cable, it is definitely attached and is definitely moving the damper (you can hear and feel it). Both hoses (to and from) the heater core come up in temperature together with only a slight difference in temperature so water flow doesn’t appear to be a problem. The water temperature is hot enough (I quit checking it at 150 degrees) but the air temperature changes about 1or 2 degrees when you go from “cold” to “hot” on the temperature control knob. I am not real sure what to do at this point.
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