E11
Sime Fan Speed / Fan Feedback Fault

Sime water heater shows E11; fan may run continuously or not at all.

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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 fan motor, Damaged fan speed sensor (Hall sensor), Loose fan connector, Control board fan driver fault

How to Fix / Troubleshooting

Safety: Disconnect power before touching the fan or control board.

Steps:

  • Visual inspection: Check the fan wiring harness and connector for damage or burning.
  • Spin test: With power off, spin the fan by hand. It should move freely. If stiff or noisy, the fan is likely failing.
  • Check for obstructions: Ensure no foreign objects are lodged in the fan housing.
  • Test operation: Restore power and call for hot water. If the fan does not start or runs erratically before E11 appears, the fan assembly may need replacement.

Professional help: Fan replacement and control board diagnostics should be carried out by a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Flue Fan Assembly
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