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.
Temperature Control Lever
This control operates the temperature door by means of a bowden cable. At COLD, no airflow is allowed through the heater core. At HOT, all air flows through the heater core. This control also operates an override vacuum switch which closes the water valve when the lever is in the maximum cold position and will also put the system into outside air whenever heat is called for, regardless of the position of the selector lever.
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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.