C1 or similar calibration code appears and the cooker refuses to start.

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.

Possible Causes

Out-of-range temperature sensor values, Incorrect sensor type installed, Firmware requiring recalibration, Damaged calibration data in memory

Safety first: Unplug the cooker before internal checks.

Check sensors: Inspect all NTC sensors (bottom, lid, auxiliary) for correct installation and secure connections.
Verify correct parts: Ensure any replaced sensors are genuine or Hisense-compatible with the correct resistance curve.
Factory reset: If supported, perform a factory reset according to the user manual to reload default calibration values.
PCB replacement: If calibration data is corrupted and cannot be reset, replace the main control board.

Hard 4/5

Main Control Board

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