Hyundai Santa Fe (TM): Air conditioning System / Evaporator Temperature Sensor. Repair procedures

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Heating,Ventilation And Air Conditioning / Air conditioning System / Evaporator Temperature Sensor. Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the evaporator temperature sensor connector.
3.
Measure resistance between terminal "+" and "-" of the evaporator temperature sensor.

Specification
Temperature[°C(°F)]
Min. Resistance[kΩ]
Resistance[kΩ]
Max. Resistance[kΩ]
-2 (28.4)
 28.84
 30.16
 30.48
0 (32)
 27.35
 27.62
 29.89
2 (35.6)
 25.05
 25.32
 25.59
4 (39.2)
 22.97
 23.24
 23.51
6 (42.8)
 21.08
 21.35
 21.61

4.
Connect the evaporator temperature sensor connector.
5.
Run the engine and turn the A/C switch ON, then measure the voltage between the terminals of the harness connector.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the evaporator core.
(Refer to Heater - "Evaporator Core")
3.
Separate the evaporator temperature sensor (A) from the evaporator core.
4.
Install in the reverse order of removal.

    Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling.

    Description The In-car air temperature sensor is built in the heater & A/C control unit. The sensor consists of a thermistor that measures the inside temperature.

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