Kia Optima DL3 Quiz
Heating, Ventilation, and Air Conditioning

Heater Control Unit

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
6steps
~36min
2/5difficulty
Done 0 of 6

Components and Component Location

Components

Connector Terminal Function

[Connector A]

Pin No. Function Pin No. Function
1 Ground 11 Ground
2 Clean Signal 12 -
3 Humidity 13 -
4 Diagnosis (Ionizer) 14 Driver Side Temperature Control Actuator Feedback
5 Ambient Temperature Sensor (+) 15 Passenger Side Temperature Control Actuator Feedback
6 Evaporator Temperature Sensor (+) 16 Intake Actuator Feedback
7 Right photo sensor (-) 17 Mode Control Actuator Feedback
8 Left photo sensor (-) 18 Automatic Anti-Fog Actuator Feedback
9 CAN Low 19 -
10 CAN High 20 -

[Connector B]

Pin No. Function Pin No. Function
1 Passenger Side Temperature Control Actuator (WARM) 11 -
2 Passenger Side Temperature Control Actuator (COOL) 12 -
3 Automatic Anti-Fog Actuator (CLOSED) 13 -
4 Automatic Anti-Fog Actuator (OPEN) 14 -
5 Driver Side Temperature Control Actuator (COOL) 15 -
6 Driver Side Temperature Control Actuator (WARM) 16 -
7 Intake Actuator (REC) 17 -
8 Intake Actuator (FRE) 18 Blower Motor (+)
9 Mode control actuator (DEF) 19 FET Drain Feedback
10 Mode control actuator (VENT) 20 PT (GATE)

[Connector C]

Pin No. Function Pin No. Function
1 Battery (+) 9 IGN1
2 IGN2 10 -
3 LIN BUS 11 -
4 REF Sensor (+5V) 12 -
5 - 13 -
6 ECV (+) 14 -
7 ECV (-) Ground 15 -
8 Ground 16 Sensor Ground

Repair Procedures

Replacement

  1. Disconnect the negative (-) battery terminal.

  2. Remove the glove box.

    (See Body - Glove Box)

  3. Remove the protective cover under the cover (A).

  4. Disconnect the heater control unit connectors (A).

  5. Loosen the mounting screw, then remove the heater control assembly (A).

  6. To install, reverse the removal procedure.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.