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No cab temp or mode control


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12 CXU613. Problem, cannot control temperature of air coming out of vents in cab(always hot).  Also cannot control the mode (vent, defrost, feet,etc…) I can control the fan speed itself.  

I have replaced the control unit itself, I put in a new actuator in the dash, neither have fixed it.  The relay in fuse panel on the dash has power.  I am not familiar with wiring of these trucks but I’m assuming if it was a fuse I’d lose all control including fan speed, Not just temp and mode.  
Any and all suggestions appreciated!
thank you

Edited by E5Farmer
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