Boiler leaking water from the bottom of the cabinet or from piping connections near the unit.

Safety: Turn off power and close the water supply to the boiler. Hot water can cause burns.

• Identify leak source: Remove the front cover and use a flashlight to trace drips upward. Check around the pressure relief valve, pump flanges, unions, and heat exchanger connections.
• Check relief valve: If water is discharging from the relief valve outlet pipe, system pressure may be too high or the valve may be faulty. Verify pressure on the gauge.
• Tighten fittings: Gently tighten any accessible union nuts or threaded connections that are seeping. Do not overtighten.
• Condensate vs. system water: Determine if the leak is clear condensate from the trap/line or system water with inhibitor. Condensate leaks often occur at the trap or plastic tubing.

Persistent leaks, especially from the heat exchanger or relief valve, should be addressed by a technician who can replace gaskets, valves, or the exchanger as needed.