Kia Optima: Air Conditioning System / 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 from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC). Electrical resistivity of NTC will increase with decreasing temperature and decrease with increasing temperature.
Repair procedures
| Inspection |
| 1. |
Turn the ignition switch OFF. |
| 2. |
Disconnect the evaporator temperature sensor connector. |
| 3. |
Measure the resistance between terminal "+" and "-" of the evaporator temperature sensor.
Specification
|
| Replacement |
| 1. |
Disconnect the negative (-) battery terminal. |
| 2. |
Remove the evaporator core assembly. (Refer to Heater - "Evaporator Core") |
| 3. |
Remove the evaporator temperature sensor (A) from the evaporator core.
|
| 4. |
To install, reverse the removal procedure. |
A/C Pressure Transducer
Description and operation
Description
The A/C Pressure Transducer (APT) converts the pressure value of high pressure
line into voltage value after measuring it. By converted voltage va ...
In-car Sensor
Description and operation
Description
The In-car air temperature sensor is built in the heater & A/C control unit.
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Other information:
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