Heater Core: Testing and Inspection

1. Disassemble the heater unit.
2. Inspect for cracks, damage, and coolant leakage.
- If any problems are found, replace the heater core.

3. Inspect for bent fins.
- If any are bent, use a flathead screwdriver to straighten them.




4. Verify that the heater core inlet and outlet are not distorted or damaged.
- If they are distorted or damaged, repair them using pliers.