Evaporator Temperature Sensor / Switch: Testing and Inspection

Compressor Controls-Circuit Testing:

1. Remove the glove box.
2. Run the engine at idle.
3. Turn OFF the A/C switch and set the blower switch to the highest position to operate the blower fan for a few minutes.
4. After a few minutes, turn OFF the blower switch and stop the engine.
5. Disconnect the A/C thermostat connector and check for continuity between terminals 1 and 2 of the switch.
6. If not as specified, replace the A/C thermostat.

NOTE: The A/C thermostat contacts will be open it the evaporator temperature is below 32.7°±1.3°F (0.4°±0.7°C).

Compressor Controls-Circuit Testing:

1. Immerse the sensing bulb in a container of ice water.
2. Check continuity between terminals of the switch as specified.
3. It not as specified, replace the A/C thermostat.