F13
V-ZUG Low Voltage or Power Supply Error

The 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 the terminal block, Failing internal power supply on the main PCB, Overloaded circuit shared with other appliances

How to Fix / Troubleshooting

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

Step-by-step checks:

  • Check dedicated circuit: Ensure the oven is connected to a dedicated circuit as recommended by V-ZUG. Avoid using other high-power appliances on the same circuit.
  • Inspect terminal block: Remove the rear cover and check that all terminal screws are tight, and that there are no signs of overheating or discoloration.
  • Measure mains voltage: Using a multimeter (performed 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 the power off for 5 minutes, then restore it. If F13 appears immediately, the internal power supply on the main PCB may be defective.

When to call a technician: Persistent F13, even 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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