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Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

AMBIENT TEMPERATURE SENSOR

INSPECTION
1. INSPECT AMBIENT TEMPERATURE SENSOR

a. Measure the resistance.

NOTE:
- Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.
- When measuring the resistance, the temperature of the sensor and the ambient temperature sensor must be the same.

HINT: As the temperature increases, the resistance decreases (see the graph).