E3
Rangemaster
Supply Voltage Out of Range
Induction hob shows E3 and beeps, often immediately after switching on.
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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
Incorrect mains voltage, loose terminal block connections, shared circuit causing voltage drop, internal power supply fault on control PCB
How to Fix / Troubleshooting
Safety first: Isolate the appliance at the mains before checking the terminal block.
Steps to check:
- Verify supply: Have a qualified electrician measure the voltage at the cooker connection point. It must match the rating plate (typically 230–240 V AC single-phase or appropriate multi-phase).
- Terminal block inspection: Remove the rear cover to access the terminal block. Check that all screws are tight and that there are no signs of overheating or melted insulation.
- Circuit loading: Ensure the hob is on a dedicated circuit of the correct rating. Overloaded circuits can cause voltage dips.
- If supply is correct: An internal power supply fault on the hob control PCB may be causing E3. PCB replacement is required and should be done by a service engineer.
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Repair Difficulty
Hard
4/5
Required Part
Hob Control PCB
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