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.
A/C Pressure Cut-Off (WAC) Switch
Switch is located at compressor, on manifold and tube assembly. Switch is designed to interrupt compressor operation in the event of excessively high operating pressure. Switch is normally closed and will open if high side pressure increases to about 430 psi (30.2 kg/cm2 ). When pressure decreases to about 260 psi (18.3 kg/cm2 ), switch closes.
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Use the Manual With the Right Hardware
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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.