Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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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.