Boiler’s condensate trap overflows or water drips from the bottom of the boiler cabinet on a condensing model.

Safety first: Turn off power. Condensate is mildly acidic; wear gloves and eye protection.

• Step 1 – Remove and clean trap: Take out the condensate trap and flush it thoroughly. Ensure all internal baffles are clear. Refill with clean water before reinstalling.
• Step 2 – Inspect hoses: Check all condensate hoses inside the boiler for cracks, kinks, or disconnections. Replace any damaged hoses.
• Step 3 – Check trap seating: Make sure the trap is fully seated and sealed to the boiler’s condensate outlet.
• Step 4 – Clear internal passages (pro): If water still backs up, internal condensate channels in the heat exchanger may be blocked and require professional cleaning.
• Step 5 – Evaluate for exchanger leak (pro): If water appears where it should not (e.g., near combustion chamber), the heat exchanger may be leaking and need replacement.

Note: Regular maintenance of the condensate system helps prevent corrosion and water damage.