E4
Redmond
Upper Lid Temperature Sensor Fault
Multicooker beeps and shows E4; unit may not heat or stops mid-cycle.
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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
Open or shorted lid NTC sensor, Broken flex cable between lid and main body, Loose connector on control board for lid sensor
How to Fix / Troubleshooting
Safety first: Disconnect from mains and allow the cooker to cool.
- Inspect lid cable: Open the lid and look at the hinge area where the cable passes from the body to the lid. Check for visible cuts, pinches, or broken insulation.
- Check connectors: Remove the top cover (screws around the lid frame) and locate the lid sensor connector on the PCB. Reseat the connector and ensure it is firmly locked.
- Test lid sensor: If accessible, disconnect the lid NTC and measure its resistance at room temperature. Compare with the bottom sensor value; they should be in a similar range. A reading of 0 Ω or infinite indicates a defective sensor.
- Replace lid sensor or cable: If the sensor or flex cable is damaged, replace the complete lid sensor harness with a Redmond-compatible part. Route the cable so it does not get pinched when opening/closing the lid.
Persistent E4 after these checks may indicate a faulty control board input circuit.
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Repair Difficulty
Hard
4/5
Required Part
Lid NTC Temperature Sensor Assembly
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