Evaporator Temperature Sensor / Switch: Testing and Inspection
On-Vehicle Inspection1. Remove the glove compartment.
2. Run the engine at idle.
3. Turn the A/C switch off and set the fan switch at 4 to operate the blower fan for a few minutes.
4. After a few minutes, turn the fan switch off and stop the engine.
Note: The thermoswitch contacts will be open if the evaporator temperature is below 0-2°C { 32-35°F }.
5. Disconnect the thermoswitch connectors and check for continuity between the switch terminals.
6. If there is no continuity, replace the thermoswitch.
Component Inspection
1. Immerse the sensing bulb in a container of ice water.
2. Check the switch operation as specified in the figure.
3. If not as specified, replace the thermoswitch.