H41
Panasonic
Power Supply / Voltage Error
Dishwasher shows H41 and may not start or may stop randomly
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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
Unstable mains voltage, Loose power cord connection, Faulty noise filter / power module, Internal PCB power supply fault
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before inspecting electrical connections.
- Check outlet and plug: Ensure the Panasonic dishwasher is plugged directly into a properly grounded outlet (not an extension cord). Inspect the plug and cord for damage.
- Verify supply voltage: Have a qualified person measure the mains voltage at the outlet to ensure it is within the specified range.
- Inspect power module: Access the base or side panel to locate the noise filter / power entry module. Check for burnt components or loose connectors.
If H41 persists and supply voltage is stable, the internal power supply on the main PCB may be faulty and the board will likely need replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Noise Filter / Power Module or Main Control PCB
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