F6
Villeroy & Boch Control Board Communication / Internal Fault

F6 error, spa may shut down heating and pumps intermittently

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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 failure of Villeroy & Boch main control board, Corrupted firmware, Moisture intrusion into control pack, Loose low-voltage harness between topside keypad and control board

How to Fix / Troubleshooting

Safety: Disconnect power at the breaker before opening the control pack.

  • Power reset: Turn off the breaker for at least 5 minutes to allow capacitors to discharge, then restore power and observe if F6 returns.
  • Inspect control pack for moisture: Remove the cover of the Villeroy & Boch control pack and look for condensation, water marks, or corrosion. Dry gently with a clean cloth and allow the compartment to air dry fully before re-energizing.
  • Check keypad cable: Ensure the ribbon cable from the Villeroy & Boch topside control panel is firmly seated on the control board and not pinched or damaged.
  • Look for burn marks: Examine the control board for burnt components, swollen capacitors, or cracked solder joints.

If F6 persists after drying and reseating connections, the control board likely needs replacement with the correct Villeroy & Boch OEM module. This should be done by a qualified technician to ensure compatibility and safe wiring.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board
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