Heater cabinet shows rust, corrosion, or staining around the base and vent

Safety First: Turn off power and gas before inspecting venting or internal components.

• Inspect vent termination: Ensure the vent is properly installed with required clearances and that condensate is not dripping back onto the heater.
• Check for water intrusion: Look for signs of roof or sprinkler water entering the cabinet. Redirect water sources and seal openings as needed.
• Relocate chemicals: Do not store chlorine or acid near the heater. Corrosive fumes can attack metal components.
• Address leaks: If corrosion is due to internal leaks or condensate misrouting, repair the underlying leak and replace severely corroded parts.