Noritz water heater is leaking water from the bottom of the unit or from internal components.

Safety first: Turn OFF power and gas immediately. Close the cold water supply valve to the heater to stop the leak. Water damage and electrical shock are possible if leak continues.

Steps to check and correct:

• Identify leak source: Remove the front cover and use a flashlight to locate the exact origin of the leak (heat exchanger, fittings, valves).
• Tighten fittings: If the leak is at a union or threaded connection, gently tighten with appropriate tools. Do not overtighten copper or brass fittings.
• Replace O-rings: For leaks at service valves or internal joints, replace O-rings or gaskets with Noritz-approved parts.
• Heat exchanger leak: If water is seeping from the heat exchanger body or welds, the exchanger must be replaced. This is typically a major repair requiring a Noritz technician.
• Check for freeze damage: Inspect for split pipes or fittings if the unit was exposed to freezing temperatures.