Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

Ambient Temperature Switch F38, Checking





Ambient temperature switch closes above 7°C (45°F) and opens below -1°C (30°F)

- set multimeter US 1119 to ohm scale
- connect test leads to terminals on ambient temperature switch
- must be continuity (0 ohm) if temperature is above 7°C (45°F)