Strong chemical or burning smell around the pool heater during operation.

Safety first: Immediately turn off power at the breaker if you smell burning. Do not continue to operate the unit.

• Visual inspection: After allowing the unit to cool, remove the access panel and look for discolored, melted, or charred wires and components.
• Check for leaks: Inspect for water dripping onto electrical components, which can cause arcing and burning smells.
• Remove foreign objects: Remove any plastic bags, leaves, or other debris that may have entered the cabinet and contacted hot parts.
• Professional repair: Any signs of burned wiring, terminals, or components should be addressed by a qualified technician who can replace damaged parts and verify safe operation.