Adjusting HVAC control on 85 C10

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Preston

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Mechanicsville VA
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Preston
Truck Year
1983
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k10
Engine Size
350
Im having trouble getting my ac compressor to cut off, can’t seem to get the defroster to work either. I think I need to adjust the cable going to the heater control valve, not sure or could it be a vacuum valve or something? Just need a little guidance here, thanks for the help
 

animal

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Location
Georgia
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Lee
Truck Year
1986
Truck Model
c10 silverado
Engine Size
350ish
I seem to have just noticed the same issue with mine :popcorn:
 

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