Hyundai Palisade (LX2): Air conditioning System / Evaporator Temperature Sensor

Hyundai Palisade (LX2) 2020-2026 Service Manual / Heating,Ventilation And Air Conditioning / 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.

Hyundai Palisade. Description and operation

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the evaporator temperature sensor connector.

Measure resistance between terminal "+" and "-" of the evaporator temperature sensor.

Hyundai Palisade. Repair procedures

Specification

Evaporator core temperature [°C (°F)]	Resistance [KΩ]	Voltage [V]
-10 (14)	17.93	3.21
0 (32)	11.36	2.66
10 (50)	7.4	2.13
20 (68)	4.94	1.66
30 (86)	3.37	1.26
40 (104)	2.35	0.95

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.	Loosen the mounting screws and remove the evaporator core cover (A).

3.	Separate the evaporator temperature sensor (A) from the evaporator core.

4.	Install in the reverse order of removal.

❮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.

In-car Sensor❯

Description and operation 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.

Other information:

Hyundai Palisade (LX2) 2020-2026 Service Manual: General safety information and caution

Instructions (R-134a) When Handling Refrigerant 1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves.

Hyundai Palisade (LX2) 2020-2026 Service Manual: Description and operation