Evaporator Temperature Sensor / Switch: Testing and Inspection

EVAPORATOR TEMPERATURE SENSOR INSPECTION

NOTE: Inspect the evaporator temperature sensor when it is installed to the A/C unit.

1. Set the fan speed MAX HI.
2. Set the temperature control at MAX COLD.
3. Set the RECIRCULATE mode.
4. Turn the A/C switch off.
5. Close all doors and windows.
6. Wait for 5 mm.
7. Disconnect the evaporator temperature sensor connector.
8. Measure the temperature at the blower inlet.




9. Measure the resistance between the evaporator temperature sensor terminals.
- If the resistance is not as shown in the graph, replace the evaporator temperature sensor.