Panasonic
Overheating Components / Electrical Overload
Water heater emits a burning smell or plastic odor during operation.
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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
Dust burning off heat exchanger, Overheated wiring or connectors, Blocked air intake causing high temperatures, Failing fan motor
How to Fix / Troubleshooting
Fire hazard: If you see smoke or strong burning smell, turn OFF power immediately and close the gas valve.
- 1. Initial use: A slight odor may be normal for a new unit as protective oils burn off. This should disappear after a few uses.
- 2. Inspect air intake and exhaust: Ensure they are not blocked, which can cause overheating.
- 3. Visual inspection (qualified persons):
- Remove the front cover.
- Look for discolored or melted wiring, connectors, or plastic parts.
- 4. Clean dust: Carefully vacuum dust from the burner and heat exchanger area.
- 5. If odor persists or damage is visible: Do not use the heater. Have an authorized Panasonic technician inspect and replace any overheated components.
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Repair Difficulty
Hard
4/5
Required Part
Wiring Harness and Connectors
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