Panasonic
Internal Water Leak
Water heater is leaking water from the bottom or inside the casing.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Corroded heat exchanger, Loose pipe union, Cracked plastic manifold, Leaking pressure relief valve
How to Fix / Troubleshooting
Water and electrical hazard: Turn OFF power at the breaker and close the water inlet valve immediately if you see a leak. Do not operate the heater while leaking.
- 1. Identify leak source (visual):
- Remove the front cover.
- Look for drips from the heat exchanger, pipe joints, or relief valve.
- 2. Tighten unions:
- Gently tighten any accessible union nuts or compression fittings that are seeping.
- 3. Check relief valve:
- If the pressure relief valve is discharging, system pressure may be too high or the valve may be faulty.
- 4. If heat exchanger is leaking: Replacement of the heat exchanger is required and should be done by an authorized Panasonic technician.
- 5. Dry electronics: If water has contacted the PCB, it may need replacement even after drying.
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Repair Difficulty
Professional Required
5/5
Required Part
Heat Exchanger
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