F18
Indesit Microprocessor / Communication Fault

Indesit dryer shows F18, may freeze mid-cycle or not respond correctly

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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

Internal microcontroller error, PCB communication bus fault, power surge damage, defective main control board

How to Fix / Troubleshooting

Safety first: Unplug the dryer before any inspection.

Attempt reset:

  • Disconnect power for at least 15–20 minutes.
  • Reconnect and try a simple timed dry program.

If F18 persists:

  • Inspect the main PCB for visible damage (burns, corrosion).
  • Check that all connectors are firmly seated.

Resolution: F18 almost always indicates a failed main control board. Replacement with a correctly programmed Indesit PCB is required and should be done by a qualified technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board (PCB)
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