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.





Text in Illustration





Standard Resistance:





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

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

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