F4
Hisense
Heater Drive Feedback Fault
F4 error appears when trying to start high-power modes like frying or pressure cooking.
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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 current sensing resistor on PCB, Defective heater relay/triac, Loose heater feedback connection, Firmware detecting abnormal heater response
How to Fix / Troubleshooting
Safety first: Unplug the cooker. This repair involves live-voltage circuits and should be done only by qualified persons.
- Visual PCB inspection: Remove the bottom cover and inspect the main PCB for burnt resistors or damaged components near the heater drive.
- Check heater connections: Ensure all heater terminals are tight and free of corrosion.
- Test heater operation: With appropriate safety measures, test whether the heater energizes briefly before F4 appears (may require a clamp meter).
- Replace PCB: If the feedback circuit components are damaged or F4 persists, replace the main control board with a Hisense-approved part.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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