Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

HEATING / AIR CONDITIONING: AMBIENT TEMPERATURE SENSOR: INSPECTION

1. INSPECT AMBIENT TEMPERATURE SENSOR (THERMISTOR ASSEMBLY)

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





Standard Resistance:





If the resistance is not as specified, replace the ambient temperature sensor (thermistor assembly).

Text in Illustration





NOTICE:
* Hold the sensor only by its connector. Touching the sensor may change the resistance value.
* When measuring, the sensor temperature must be the same as the ambient temperature.

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