Kia Optima Hybrid: Air Conditioning System / Evaporator Temperature Sensor Repair procedures

Inspection
1.
Ignition "OFF"
2.
Disconnect evaporator temperature sensor.
3.
Using the multi-tester, Measure resistance between terminal "1" and "2" of evaporator temperature sensor.

Specification
Evaporator core
temperature[°C(°F)]
Resistance[K?]
-10 / (14)
43.35
0 / (32)
27.62
10 / (50)
18.07
20 / (68)
12.11
30 / (86)
8.3
40 / (104)
5.81

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Loosen the mounting screw and then remove the crash pad lower cover (A).

3.
Remove the evaporator temperature sensor (A), by pulling it after rotating 90° in a counterclockwise direction.

4.
Installation is the reverse order of removal.
Evaporator Temperature Sensor Description and Operation

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

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