Heater cabinet shows rust streaks and corrosion, especially near the base and around water connections.

Safety: Turn off power and pump before inspecting for active leaks.

• Locate and repair leaks: Check unions, header, and internal piping for slow leaks and repair as needed.
• Improve site drainage: Ensure the heater pad is level and water drains away from the cabinet. Avoid standing water around the base.
• Address chemistry: Work with a pool professional to correct low pH or other aggressive water conditions.
• Replace severely corroded parts: If structural components or the heat exchanger are heavily corroded, replacement of those parts or the entire heater may be necessary.