F3
Sencor Mode Switch / Keypad Fault

Vacuum shows F3 and cannot switch between power modes; only one speed works or none.

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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

Defective mode button on handle, Damaged keypad PCB in Sencor handle, Loose ribbon cable from keypad to main board, Liquid ingress around buttons

How to Fix / Troubleshooting

Safety first: Remove the battery before inspecting the handle or buttons.

  • Check for sticking: Press the mode button repeatedly. If it feels stuck or does not click, debris or dried liquid may be under the button.
  • Clean exterior: Wipe around the buttons with a slightly damp cloth (water only), then dry thoroughly. Do not spray cleaners directly onto the handle.
  • Drying (if spilled on): If liquid was spilled on the handle, remove the dust bin and filters and let the unit dry for 24–48 hours in a warm, dry place.
  • Internal repair: If F3 persists, the keypad PCB or ribbon cable may need replacement. This requires opening the handle and should be done by a technician using the correct Sencor spare parts.
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Repair Difficulty

Hard 4/5

Required Part

Handle Keypad PCB
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