The thermistor will detect the core temperature and interrupt compressor relay power, in order to prevent evaporator freezing by excessive cooling.
The thermistor is an NTC device.
Thermistor check
Remove the glove box.
Start the engine.
Turn on the air conditioner.
Using the multi-tester, check the output voltage between terminals 2 and 3 in the thermistor.
Thermistor | Operating temperature | Output voltage |
ON | 0.5 ± 0.5°C | 12V |
OFF | 2.5 ± 0.5°C | 0V |
