Kia Optima: Air Conditioning System / Evaporator Temperature Sensor
Description and operation
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
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
Evaporator core temperature
[°C (°F)]
|
Resistance [KΩ]
|
Voltage [V]
|
-10 (14)
|
43.35
|
2.96
|
0 (32)
|
27.62
|
2.40
|
10 (50)
|
18.07
|
1.88
|
20 (68)
|
12.11
|
1.44
|
30 (86)
|
8.30
|
1.08
|
40 (104)
|
5.81
|
0.81
|
1. Sensor Ground
|
2. Evaporator sensor
(+)
|
|
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.
|
Description and operation
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Other information:
Repair procedures
Replacement
1.
Remove the hood seal weatherstrip (A) and then remove the clip from the
panel.
Be careful not to scratch the hood seal weatherstrip.
...
Repair procedures
Refrigerant System Service
Basics (R-134a)
Refrigerant Recovery
Use only service equipment that is U.L-listed and is certified to meet the requirements
of SAE J2210 to remove HFC-134a(R-134a) from the air conditioning system.
&nb ...