Kia Optima DL3: Heater / Heater Core

Kia Optima DL3 2019-2026 Service and Repair Manual / Heating, Ventilation and Air Conditioning / Heater / Heater Core

Repair procedures

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the heater and blower assembly. (Refer to Heater - "Heater Unit")

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

4.	Separate the heater core (A) from the heater unit.

To install, reverse the removal procedure.

•	If you're installing a new heater core, add refrigerant oil (PAG OIL).

•	Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a, R-1234yf to avoid leakage.

•	Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.

•	Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.

•	Apply sealant to the grommets.

•	Make sure that there is no air leakage.

•	Charge the system and test its performance.

•	Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.

❮Heater Unit

Components and components location Component Location 1. Heater unit assembly Compoents 1.

Evaporator Core❯

Repair procedures Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly.

Other information:

Kia Optima DL3 2019-2026 Service and Repair Manual: Power Mosfet

Description and operation Description It is installed to the DATC and adjusts the fan rpm by precisely controlling the voltage applied to the blower motor. Repair procedures Inspection 1. Turn the ignition switch ON.

Kia Optima DL3 2019-2026 Service and Repair Manual: Climate Control Air Filter

Description and operation Description The climate control air filter is located in the blower unit. It eliminates foreign materials and odor. The particle filter performs a role as an odor filter as well as a conventional dust filter to ensure comfortable interior environment.

Kia Optima DL3: Heater / Heater Core

Repair procedures

Other information:

Kia Optima DL3 2019-2026 Service and Repair Manual: Power Mosfet

Kia Optima DL3 2019-2026 Service and Repair Manual: Climate Control Air Filter

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