H1
Polaris
High Temperature Detected at Bottom Sensor
Display shows H1 and the cooker refuses to start or immediately stops heating.
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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
Bottom sensor reading abnormally high due to sensor failure, Sensor not in proper contact with heating plate, Residual heat from previous cycle not allowed to dissipate, Control board miscalibration
How to Fix / Troubleshooting
Safety first: Allow the cooker to cool completely before further troubleshooting.
- Cool-down: Leave the lid open and the cooker unplugged for at least 30–40 minutes, then retry. If H1 persists on a cold unit, continue.
- Check sensor mounting: Access the bottom sensor and ensure it is firmly attached to the heating plate and not hanging loose.
- Measure sensor resistance: Compare the NTC resistance to expected room-temperature values. A very low resistance suggests a sensor fault.
- Replace sensor if out of spec: Install a new Polaris bottom NTC sensor if readings are abnormal.
- Board replacement: If a new sensor does not resolve H1, the main board may be misreading temperature and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Bottom Temperature Sensor (NTC)
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