F13
V-ZUG Low Voltage or Power Supply Error

Oven beeps and shows F13; time and programs may reset unexpectedly.

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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

Unstable mains voltage, Loose neutral or phase connection at terminal block, Failing internal power supply on main PCB, Overloaded circuit shared with other appliances

How to Fix / Troubleshooting

Safety first: Switch off power at the distribution board before inspecting connections.

Step-by-step checks:

  • Check dedicated circuit: Ensure the oven is on a dedicated circuit as recommended by V-ZUG. Avoid using high-power appliances on the same circuit.
  • Inspect terminal block: Remove the rear cover and check that all terminal screws are tight and there are no signs of overheating or discoloration.
  • Measure mains voltage: With a multimeter (by a qualified person), verify that the supply voltage is within the specified range for your model (e.g., 230 V ±10%).
  • Reset oven: Turn power off for 5 minutes, then restore. If F13 appears immediately, the internal power supply on the main PCB may be defective.

When to call a technician: Persistent F13 with correct supply voltage indicates a failing main PCB that should be replaced by an authorized technician.

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Repair Difficulty

Hard 4/5

Required Part

Main PCB / Power Supply Section
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