Corrosion or rust visible on metal parts of the heater cabinet or fasteners.

Safety first: Turn off power before performing any cleaning or minor repairs.

• Clean surfaces: Gently clean rusted areas with a non-metallic brush and mild detergent. Rinse and dry thoroughly.
• Touch-up coating: Apply a suitable anti-corrosion primer and paint to affected cabinet areas, avoiding labels and electrical components.
• Improve environment: Store pool chemicals away from the heater and ensure good ventilation to reduce corrosive fumes.
• Check drainage: Ensure water does not pool around the base of the unit; improve grading or add a pad if necessary.