Water leaking from under the boiler cabinet or from piping connections

Safety first: Turn off power and, if leak is significant, close isolation valves to the boiler. Beware of hot water and surfaces.

• Identify leak source: Remove the front panel and use a flashlight to trace the leak. Check around the pressure relief valve, pump flanges, heat exchanger connections, and condensate trap.
• Relief valve discharge: If water is coming from the relief valve discharge pipe, check system pressure. High pressure may indicate a failed expansion tank or overfilled system.
• Tighten fittings: Carefully tighten any accessible unions or threaded fittings that are seeping. Do not overtighten plastic condensate fittings.
• Condensate leaks: Inspect the condensate trap and tubing for cracks or loose connections. Replace damaged tubing and reseat connections.

Professional help: If the heat exchanger itself is leaking or if you cannot locate the source, contact a Lochinvar service technician. Operating with leaks can damage electronics and structure.