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.
Thermal Protection Switch (Hybrid Only)
Under high air conditioning load conditions, the A/C compressor temperature may get hot enough to trigger the compressor thermal protection switch which will disengage the A/C compressor clutch. The thermal protection switch is located in the A/C compressor housing, near the discharge port and is wired in series with the A/C clutch field coil. When refrigerant discharge temperatures heat the switch to 115°C (239°F), the switch will open and disengage the compressor, but no PCM DTCs will be set. The switch will close once the temperature cools to approximately 105°C (221°F). If the switch were to stick open, it would remain open at room temperature.
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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.