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

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