When trying to adjust temp higher or lower both heater and A/C are both wide open and no adjustment can be felt when turning the knob.
Vaccum line off, broken, ????
I think your jimmy is too new for it to be a vacuum line, it's probably an electrical input. my guess is that switch is not happening anymore and what you are now getting is a fail safe mode. will probably have to replace the switch to get things working right again. hope that helps
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