How to Determine if the Car Air Conditioning Thermostat Switch is Faulty?

[SabrinaAnn]

Here are the methods to determine if the car air conditioning thermostat switch is faulty: 1. After powering on, the air conditioning temperature controller shows no display. (1) Check whether the zero and live wires of the air conditioning temperature controller terminals are properly connected to ensure normal power supply. (2) Check whether the ribbon cable between the LCD motherboard and the drive power supply is loose. (3) For temperature controllers with a power switch, ensure the switch is set to "off" or "1". (4) Verify the wiring power supply voltage before connecting the air conditioning temperature controller. 2. The actual fan speed displayed on the air conditioning temperature controller does not match the indication. Check whether the terminal connection sequence of the air conditioning temperature controller is incorrect. 3. The air conditioning temperature controller displays normally but control errors occur. (1) Check whether the ribbon cable of the air conditioning temperature controller is properly connected. (2) Check whether the ribbon cable wiring of the air conditioning temperature controller is correct. 4. The room temperature (measured temperature) displayed by the air conditioning temperature controller deviates. (1) Before using the air conditioning temperature controller, recalibrate the temperature measurement. (2) Check the sensor of the air conditioning temperature controller. (3) The installation position may not be suitable for the air conditioning temperature controller; improve the installation environment.