What U may mean on a La Cornue appliance, the symptoms you might see, safe checks you can perform, and when it is time to call a technician.
U on a Château induction hob means no pan, or a pan that does not suit induction. It clears with a suitable pan.
Model compatibility: La Cornue reuses codes across series and model years, so U may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
U shows when no pan is detected or the pan is unsuitable for induction, and clears when a suitable pan is placed on the zone.
The U on a La Cornue induction hob is a display indicator rather than a breakdown. It appears when there is no pan on the heating zone, or when the pan is not suited to induction. Power cannot be increased while it shows.
The Château induction hob module of the current G4 series: Château 90, 120 and 150, plus induction ranges described in the guide.
Place a suitable pan on the zone and the symbol disappears. If a pan is lifted off during cooking, the zone stops and U appears. Put the pan back and cooking resumes at the power level that was set before.
After cooking, turn the zone off at its knob instead of leaving pan detection active.
If U stays on even with a suitable pan in place, call (310) 570-2050 about cooktop repair in Los Angeles. Tell us the model and which pan you used.
Source: Château G4 Installation – User Guide – All Electric / Induction, 2024 (lacornueusa.com file 704); Château G4 Installation – User Guide (current, April 2026) (lacornueusa.com file 825)
Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
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