Thanks Dave I will check that out because right now I know that the thing should be on full tilt boogy on heat because thats that I have wired open but never thought of the blend door
I have a 1985 f-250 6.9. I have a heater core question/problem.
When this truck comes up to temp. get no heat or very little. The hose's are hot on both the supply and the return. I have not noticed any leaks but can't rule out one.I have some vanishing coolant, not a lot,
but still...
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