F15
V-ZUG Steam Generator Temperature or Sensor Fault

Steam-assisted V-ZUG oven (Combi-Steam) shows F15; steam functions do not start.

Advertisements

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.

Advertisements

Possible Causes

Faulty steam boiler NTC sensor, Limescale buildup on steam generator, Overheated steam heater, Wiring fault between boiler and control board

How to Fix / Troubleshooting

Safety first: Disconnect mains power and allow the appliance to cool completely before working on the steam system.

Step-by-step checks:

  • Descale the steam system: Run the full descaling program using the recommended V-ZUG descaling agent. Follow on-screen instructions carefully.
  • Check water supply: Ensure the water tank is correctly seated and filled with fresh water, or that the plumbed water connection is open and filtered.
  • Inspect boiler sensor: Access the steam generator (usually on the side or top). Check the NTC sensor connection and wiring for damage.
  • Measure sensor resistance: With the sensor disconnected, measure resistance at room temperature and compare with service values. Replace the sensor if open, shorted, or out of range.

When to call a technician: If F15 persists after descaling and sensor checks, the steam generator or its heater may be defective and should be replaced by a qualified technician.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

Steam Generator NTC Sensor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements