Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Front Auxiliary HVAC Control Assembly
The front auxiliary HVAC control assembly is a non-class 2 device that interfaces between the front seat occupants and the auxiliary HVAC control module. A 5-volt reference is supplied to the control assembly by the auxiliary HVAC control module. The control assembly varies the 5-volt reference through three integrated potentiometers to control mode, air temperature door position, and blower motor speed inputs to the auxiliary HVAC control module.
The front auxiliary HVAC control assembly is a non-class 2 device that interfaces between the front seat occupants and the auxiliary HVAC control module. A 5 volt reference is supplied to the control assembly by the auxiliary HVAC control module. The control assembly varies the 5 volt reference through three integrated potentiometers to control auxiliary mode door position, auxiliary air temperature door position and auxiliary blower motor speed inputs to the auxiliary HVAC control module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.