--- title: "La Cornue induction hob: the cooker will not switch on, and the maker’s two questions are both about the supply" description: "La Cornue induction hob: the cooker will not switch on, and the maker and #8217;s two questions are both about the supply: la Cornue — an indicator rather…" url: "https://la-cornuemiami.support/error-codes/hob-will-not-switch-on/" date_modified: "2026-09-04" Appliance type: "Cooktops and rangetops, Ranges" --- # La Cornue induction hob: the cooker will not switch on, and the maker’s two questions are both about the supply ### What the appliance is actually doing The guide’s entry for a cooker that will not switch on consists of two questions, and neither of them is about the appliance: has the wiring system in the house blown a fuse or tripped a residual-current device, and has the cooker been correctly connected to the mains supply. That is a useful thing for an owner to know, because it means the first five minutes of this problem belong to the consumer unit rather than to a technician. ### Quoted rather than interpreted > Has the wiring system in the house blown a fuse or tripped an Residual-Current Device? Has the cooker been correctly connected to the mains supply? From the CornuFé 110 induction installation and user guide (U111136-03, January 2023), in a User Guide & Service Manual downloaded from La Cornue’s own site. Nothing on this page is decoded beyond what that sentence says. ### Which machines this one applies to La Cornue induction cooktops and rangetops, and the electric and multifunction ovens. La Cornue publishes three codes in the whole of its US documentation and its Château guide carries no troubleshooting section, so a behavior missing from this archive is not proof that your appliance cannot do it — the maker simply never wrote a table for it. What its guides do document, they document in sentences, and those are on this site under the maker’s own wording. The model number, and which top the range was ordered with, settle what any of it means. ### What to do about it - Check the consumer unit for a blown fuse or a tripped device. - Check any isolating switch for the range, which on a fitted kitchen can be behind a cabinet door and easy to knock. - Establish whether the connection has ever been disturbed — this question exists in the guide because installation problems are common. - If the supply is good, look for a latched U400, which is the same silence with a message attached. - Then have it measured at the appliance. ### Where this goes next The job this usually becomes is [cooktop control and wiring repair](/services/cooktop-control-and-wiring-repair/), and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 614-3699](tel:+13056143699) and describe what the display is doing before booking anything. La Cornue induction cooktops and rangetops, and the electric and multifunction ovens What the machine is telling you What the appliance is actually doing The guide’s entry for a cooker that will not switch on consists of two questions, and neither of them is about the appliance: has the wiring system in the house blown a fuse or tripped a residual-current device, and has the cooker been correctly connected to the mains supply. That is a useful thing for an owner to know, because it means the first five minutes of this problem belong to the consumer unit rather than to a technician. Quoted rather than interpreted Has the wiring system in the house blown a fuse or tripped an Residual-Current Device? Has the cooker been correctly connected to the mains supply? From the CornuFé 110 induction installation and user guide (U111136-03, January 2023), in a User Guide & Service Manual downloaded from La Cornue’s own site. Nothing on this page is decoded beyond what that sentence says. Which machines this one applies to La Cornue induction cooktops and rangetops, and the electric and multifunction ovens. La Cornue publishes three codes in the whole of its US documentation and its Château guide carries no troubleshooting section, so a behavior missing from this archive is not proof that your appliance cannot do it — the maker simply never wrote a table for it. What its guides do document, they document in sentences, and those are on this site under the maker’s own wording. The model number, and which top the range was ordered with, settle what any of it means. What to do about it Check the consumer unit for a blown fuse or a tripped device. Check any isolating switch for the range, which on a fitted kitchen can be behind a cabinet door and easy to knock. Establish whether the connection has ever been disturbed — this question exists in the guide because installation problems are common. If the supply is good, look for a latched U400, which is the same silence with a message attached. Then have it measured at the appliance. Where this goes next The job this usually becomes is cooktop control and wiring repair, and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 614-3699](tel:+13056143699) and describe what the display is doing before booking anything. --- **[Read full article: La Cornue induction hob: the cooker will not switch on, and the maker’s two questions are both about the supply](https://la-cornuemiami.support/error-codes/hob-will-not-switch-on/)**