Chefman Low-Power Heating Control Fault

Keep Warm function does not maintain temperature; food cools down too quickly.

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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

Faulty temperature sensor reading too low, Heater relay not engaging at low duty cycle, Firmware issue with Keep Warm mode, Poor pot-to-heater contact

How to Fix / Troubleshooting

Safety first: Use a food thermometer to ensure food remains above safe holding temperatures (typically 60°C / 140°F).

  • 1. Verify lid position: Keep the lid closed during Keep Warm to retain heat.
  • 2. Check inner pot contact: Ensure the pot sits flat on the heating plate and is not warped.
  • 3. Test other modes: If full-power cooking modes work but Keep Warm does not, the control logic or sensor may be at fault.
  • 4. Replace sensor or board (advanced): If the sensor reads incorrectly or the relay does not cycle during Keep Warm, replace the bottom NTC sensor or main control board.
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Repair Difficulty

Medium 3/5

Required Part

Bottom NTC Sensor / Main Control Board
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