Heater Core Inspection
WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Discharge the refrigerant. (See REFRIGERANT RECOVERY .) (See REFRIGERANT CHARGING .)
- Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
- Remove the dashboard. (See DASHBOARD REMOVAL .) (See DASHBOARD 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 .)