HVAC, Temp Control Loss... I am SO PISSED!

[Waterloo]

(01-28-2017 )pearce trucking Wrote:  I know this is the obvious, but I have to ask? Are your heater lines supplying hot coolant to the heater core?

Yep, that was the first place I checked, because that was exactly how it all "felt" in the cab. Like someone had turned off my heater line. I pulled the HVAC HU and there was no signal going to the actuator according to my multi-meter so I believe I have this issue solved...