Kia Optima DL3: Air Conditioning System / A/C Pressure Transducer

Kia Optima DL3 2019-2025 Service and Repair Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / 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 value, engine ECU controls the cooling fan by operating it high speed or low speed. Engine ECU stops the operation of the compressor when the temperature of refrigerant line is very high or very low irregularly to optimize air conditioning system.

Repair procedures

Inspection

1.	Measure the pressure of high pressure line by measuring voltage output between terminal "1" and "2".

Inspect the voltage value whether it is sufficient to be regular value or not.

Voltage = 0.00878835 * Pressure + 0.37081095

3.	If the measured voltage value is not wihtin specification, replace the A/C pressure transducer.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Recover the refrigerant with a recovery / charging station.

3.	Press the lock pin and separate the A/C Pressure transducer connector (A).

Remove the A/C pressure transducer (A).

Tightening torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

•	Be careful not to bend the liquid & suction pipe.

To install, reverse the removal procedure.

•	When installing, replace it with a new O-ring.

❮Receiver-Drier

Repair procedures Replacement 1. Remove the condenser. 2. Remove the cap (A) on the bottom of the condenser with a L wrench.

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.

Other information:

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