Corrosion or rust visible on burners, heat exchanger, or inside cabinet.

Safety first: Turn off power and gas before cleaning or replacing corroded parts.

Steps to address corrosion:

• Identify source: Ensure pool chemicals are not stored near the heater and that exhaust from indoor pools is properly vented.
• Repair leaks: Fix any internal water leaks that may be dripping on components.
• Clean and treat: Light surface rust on burners and cabinet can be brushed off and treated with high‑temperature paint where appropriate.
• Replace severely corroded parts: Replace badly rusted burners, heat exchanger, or headers with Raypak parts.

Note: Consider using cupronickel heat exchangers in aggressive water environments.