Panasonic Water Quality / Corrosion Contamination

Water heater displays normal operation but hot water smells metallic or has discoloration.

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.

Possible Causes

Corroded internal copper heat exchanger, Rust in plumbing system, Reaction with anode in storage pre‑tank, Contaminated water supply

Health consideration: Discolored or foul‑smelling water should not be consumed.

1. Isolate source:
- Check if odor/discoloration occurs on cold water as well. If yes, the issue is likely in the supply or plumbing.
2. Flush heater:
- Open hot taps fully and flush for several minutes.
3. Inspect plumbing:
- Have a plumber check for corroded galvanized pipes or old storage tanks.
4. If isolated to heater: The heat exchanger may be corroding internally and should be inspected and possibly replaced by a Panasonic technician.

Hard 4/5

Heat Exchanger

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