Kia Forte: Heater / Temperature Control Actuator

Kia Forte 2019-2021 (BD) Service Manual / Heating, Ventilation and Air Conditioning / Heater / Temperature Control Actuator

Description and operation
Description

The temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows.

The signal from the control unit adjusts the position of the temperature door by operating the temperature switch. Then the temperature will be regulated by the hot/cold air ratio decided by the position of the temperature door.

Specifications
Specifications

Door Position
Voltage (V)
Error Detecting
Max. cooling
0.3 ± 0.15
Low voltage : 0.1V or less
High voltage : 4.9V or more
Max. heating
4.7 ± 0.15

Repair procedures
Inspection
1.

Turn the ignition switch OFF.

2.

Disconnect the temperature control actuator connector.

3.

Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.

Verify that the temperature control actuator operates to the warm position when connected in reverse.

Pin NO
Function
1
-
2
-
3
Cool position
4
Sensor (+5V)
5
Feedback signal
6
Sensor ground
7
Warm position

4.

Connect the temperature control actuator connector.

5.

Turn the ignition switch ON.

6.

Check the voltage between terminal 5 and 6.

7.

If the measured voltage is not within specification, check the operation by replacing the existing temperature control actuator with a new genuine part. After that, determine whether replacement of the temperature control actuator is required or not.

Replacement

[Driver's side]

1.

Disconnect the negative (-) battery terminal.

2.

Disconnect the temperature control actuator connector (A).

3.

After loosening the mounting screws, remove the temperature control actuator assembly (A).

4.

To install, reverse the removal procedure.

[Passenger's side]

1.

Disconnect the negative (-) battery terminal.

2.

Remove the crash pad center lower panel.

(Refer to Body - "Crash Pad Center Lower Panel")

3.

Remove the passenger's side shower duct (A) after loosening the screw.

4.

Disconnect the connector (B) and then remove the passenger's side temperature control actuator (A) after loosening the mounting screws.

5.

To install, reverse the removal procedure.

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