H02
Panasonic
Heater Overheat / Dry-Boil Protection Error
Display shows H02; machine may shut down shortly after starting or not heat water properly.
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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
Heater operating without sufficient water, Scale restricting water flow through heater, Faulty thermal cutoff on heater, Defective heater relay on control PCB
How to Fix / Troubleshooting
Safety first: Unplug the unit and let it cool completely.
- Check water level: Ensure the water tank is filled above the minimum mark and properly seated. Never run the machine with an empty tank.
- Descale heater: Perform a descaling cycle to remove mineral buildup from the heater tube and internal channels. Follow Panasonic's instructions for your model.
- Inspect for kinks: If accessible, check silicone water hoses for kinks or pinches that could restrict flow.
- Service heater circuit: If H02 recurs even with proper water level and after descaling, the thermal cutoff or heater control circuit may be faulty. This requires disassembly and electrical testing by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Heater Assembly
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