Evaporator Temperature Sensor / Switch: Testing and Inspection

A/C Thermostat





Dip the evaporator sensor into a pan filled with ice water, and check for continuity between the terminals.

Cutoff 1.5 - -O.5°C (35-33°F)
Cut in 2.5 - 5°C (36-41°F)

If cut off or cut in temperature is too low or too high, replace the A/C thermostat.