Heater Core Inspection

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Discharge the refrigerant. (See REFRIGERANT CHARGING .)
Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Remove the dashboard (See DASHBOARD REMOVAL .) (See DASHBOARD INSTALLATION .)
Remove the blower unit. (See BLOWER UNIT REMOVAL/INSTALLATION .)
Remove the A/C unit. (See A/C UNIT REMOVAL/INSTALLATION .)
Remove the heater core. (See A/C UNIT DISASSEMBLY/ASSEMBLY .)
Inspect the heater core for damage, cracks, and water leakage.
- If there is any malfunction, replace the heater core. (See A/C UNIT DISASSEMBLY/ASSEMBLY .)
Visually inspect the fins for bending.
- If there is any bending, use the end of a flathead screwdriver to straighten the fins.
Visually inspect the heater hose for deformation.
- Repair with pliers if there is deformation. If there is any malfunction, replace the heater core. (See A/C UNIT DISASSEMBLY/ASSEMBLY .)