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

Water and electrical safety: Immediately turn OFF power at the breaker and close the cold water supply valve. Do not operate a leaking unit.

Leak isolation steps:

• Remove the front cover and use a flashlight to locate the exact source of the leak (heat exchanger, inlet/outlet fittings, flow sensor, element gaskets).
• Tighten any compression or threaded fittings slightly, being careful not to overtighten and damage threads.
• Replace any visibly cracked or flattened O-rings on the flow sensor, heating elements, or other removable components.
• If the copper heat exchanger itself is leaking (pinhole or crack), the entire heat exchanger assembly must be replaced; this is typically a technician-level repair.
• After repairs, slowly reopen the water supply while watching for leaks before restoring power.

Do not energize the heater until all leaks are fully resolved and the interior is dry.