Room Temperature Sensor: Inspection

INSPECT ROOM TEMPERATURE SENSOR

Remove the A/C room temperature sensor.
Disconnect the connector from the A/C room temperature sensor.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1 (+) - 2 (-)	10°C (50°F)	3.00 to 3.73 kΩ
1 (+) - 2 (-)	15°C (59°F)	2.45 to 2.88 kΩ
1 (+) - 2 (-)	20°C (68°F)	1.95 to 2.30 kΩ
1 (+) - 2 (-)	25°C (77°F)	1.60 to 1.80 kΩ
1 (+) - 2 (-)	30°C (86°F)	1.28 to 1.47 kΩ
1 (+) - 2 (-)	35°C (95°F)	1.00 to 1.22 kΩ
1 (+) - 2 (-)	40°C (104°F)	0.80 to 1.00 kΩ
1 (+) - 2 (-)	45°C (113°F)	0.65 to 0.85 kΩ
1 (+) - 2 (-)	50°C (122°F)	0.50 to 0.70 kΩ
1 (+) - 2 (-)	55°C (131°F)	0.44 to 0.60 kΩ
1 (+) - 2 (-)	60°C (140°F)	0.36 to 0.50 kΩ

Fig 1: Room Temperature Sensor Graph

G05297963

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NOTE:

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).