H03
Panasonic
Warming Plate Temperature Sensor / Overheat Error
Display shows H03; warming plate does not heat or shuts off quickly.
Advertisements
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.
Advertisements
Possible Causes
Failed NTC sensor on warming plate, Open thermal fuse on plate, Loose wiring to plate, Faulty control PCB temperature monitoring
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker and allow the warming plate to cool fully.
- Check for physical damage: Inspect the warming plate surface for cracks, warping, or burn marks. Do not use the unit if the plate is damaged.
- Clean plate surface: Wipe off any burnt coffee or residue that could cause uneven heating. Use a damp cloth only when the plate is cool.
- Reset by power cycle: After cooling, plug in and test. If H03 appears immediately, the plate sensor or fuse is likely open.
- Professional service: Replacing the warming plate sensor or thermal fuse requires opening the base and working with mains wiring. This should be done by a qualified technician.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Warming Plate Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements