E4
AEG Supply Voltage Too Low or Power Module Undervoltage

Induction hob displays E4 and zone does not heat

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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

Undersized wiring or long cable run causing voltage drop, Loose connection at terminal block, Shared circuit overloaded, Faulty power module undervoltage detection

How to Fix / Troubleshooting

Safety: Switch off power at the cooker isolation switch before inspecting any wiring.

User-level checks:

  • Ensure the hob is on a dedicated circuit with the correct breaker rating as specified by AEG.
  • Avoid running multiple high-power appliances (e.g. oven, kettle) on the same circuit if not designed for it.
  • Reset the hob by turning off the breaker for 2–3 minutes, then restore power.

Professional checks:

  • Inspect the terminal block connections for signs of overheating, discoloration, or looseness; tighten or replace as needed.
  • Measure voltage under load to confirm it stays within AEG's specified range.
  • If supply is stable, the power module may have a faulty undervoltage circuit and require replacement.

Because this involves mains wiring, an electrician or AEG service technician should perform internal tests and repairs.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Power Module
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