H2
Toshiba
Keep-Warm Overheat / Temperature Drift
H2 error appears during keep-warm or low-temperature modes; food may scorch on the bottom.
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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
Incorrect temperature calibration on main PCB, Bottom sensor partially detached from heater plate, Inner pot coating damaged causing hot spots
How to Fix / Troubleshooting
Safety: Unplug the cooker and allow it to cool before inspection.
- 1. Check inner pot condition: Inspect the non-stick coating for severe wear, bubbling, or exposed metal. Replace the Toshiba inner pot if damaged.
- 2. Verify sensor mounting: Access the bottom of the heater plate and ensure the NTC sensor is firmly attached with its clip or thermal compound. A loose sensor can misread temperature.
- 3. Clean heater surface: Remove any burnt residue from the heater plate that could cause localized overheating.
- 4. Test with water only: Add water to the pot and run keep-warm mode. If H2 appears or water boils vigorously, the control board may be miscalibrated and require replacement.
Do not attempt to adjust internal calibration values without Toshiba service documentation.
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Repair Difficulty
Medium
3/5
Required Part
Inner Pot (Toshiba Original)
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