HEATER CORE INSPECTION

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1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

2.  Discharge the refrigerant. (See REFRIGERANT CHARGING.)

3.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZR 1.6].)(See ENGINE COOLANT REPLACEMENT [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See ENGINE COOLANT REPLACEMENT [SKYACTIV-D 1.5].)(See ENGINE COOLANT REPLACEMENT [SKYACTIV-D 2.2].)

4.  Remove the dashboard. (See DASHBOARD REMOVAL.)(See DASHBOARD INSTALLATION.)

5.  Remove the blower unit. (See BLOWER UNIT REMOVAL/INSTALLATION.)

6.  Remove the A/C unit. (See A/C UNIT REMOVAL/INSTALLATION.)

7.  Remove the heater core. (See A/C UNIT DISASSEMBLY/ASSEMBLY.)

8.  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.)

9.  Visually inspect the fins for bending.

•  If there is any bending, use the end of a flathead screwdriver to straighten the fins.

10.  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.)