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 sensor
The anti-freeze protection for the system consists of a temperature sensor. This measures the temperature of the airflow which has just passed the evaporator. The sensor has a capacity controlling function. This switches the compressor on/off to prevent condensation freezing. The following modifications have been introduced.
- The sensor is located downstream of the evaporator. This makes it easier to install/replace the component.
- The sensor transmits a signal to the climate control system. The climate control system transmits the signal on to the engine control module (ECM). The ECM regulates the switching on/off for the air conditioning relay. The A/C relay switches off the compressor (at 4.0 - 6.9°C) and on (at 4.8 - 7.5°C). The control module can delay the engagement or temporarily disconnect the compressor under full acceleration.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.