H2
Polaris
High Temperature Detected at Lid Sensor
H2 appears during or after high-temperature cooking; cooker stops heating and may beep continuously.
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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
Lid sensor exposed to excessive steam due to blocked vent, Faulty lid NTC sensor, Insulation damage around lid sensor, Control board misreading lid temperature
How to Fix / Troubleshooting
Safety first: Unplug and allow the cooker to cool. Avoid touching hot steam components.
- Clean steam vent: Remove and clean the steam release valve and anti-block shield to ensure steam is vented correctly.
- Inspect lid sensor area: Remove the inner lid and decorative cover to access the lid sensor. Check for melted plastic or insulation around the sensor.
- Test sensor: Measure resistance at room temperature and compare to specifications. Replace if significantly out of range.
- Reassemble and test: After cleaning and/or replacing the sensor, run a low-temperature program to confirm that H2 does not reappear.
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Repair Difficulty
Medium
3/5
Required Part
Lid Temperature Sensor (NTC)
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