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Ambient Temperature Sensor / Switch HVAC: Testing and Inspection





HEATING / AIR CONDITIONING: AMBIENT TEMPERATURE SENSOR: INSPECTION

1. INSPECT COOLER THERMISTOR (AMBIENT TEMPERATURE SENSOR)





(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





HINT
As the temperature increases, the resistance decreases (refer to the graph).

NOTICE:
* Touching the sensor even slightly may change the resistance value. Be sure to hold the connector of the sensor.
* When measuring the resistance, the sensor temperature must be the same as the ambient temperature.

If the result is not as specified, replace the cooler thermistor (ambient temperature sensor).
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