--- title: "Hestan induction range showing U 400 | RangeRepair.center" description: "What U 400 means on Hestan induction ranges, what to check before booking, and when it is not a failure at all." url: "https://rangerepair.center/error-codes/hestan-induction-u400/" --- # Hestan induction range showing U 400 U 400 with a continuous tone means the Hestan induction range sees too high a voltage at its power inlet. ## What U 400 actually means. U 400 with a continuous tone means the Hestan induction range sees too high a voltage at its power inlet. Hestan ties it to the way the appliance is connected to the supply. Hestan range display · also shown as U400 What to do when U 400 shows on the range ### Kind of code Surface elements and induction A radiant element, a coil or an induction zone did not heat the way the control expected, or ran hotter than it should. The pan, the switch behind the knob and the wiring to the element come first; on induction, the power board and the coil under the glass are checked next. A zone that will not switch off, or a crack in the glass, means the breaker goes off before anything else. ### Usually leads to Surface element and glass top repair Electric zones that stay cold, run too hot or will not switch off, and cracked or damaged glass on radiant and induction models. ### Shows up as Range Keeps Tripping the Breaker The range breaker trips when you switch on an element, the oven or self-clean, or it trips by itself with the range idle. ### Make Hestan A California maker of professional-style gas and dual-fuel ranges with a restaurant-kitchen background. ### Source Hestan KRI induction range use and care manual, induction error codes Hestan KRI induction ranges. ## Before you book, in this order. Each step comes from Hestan's own guidance for U 400 on its ranges. Follow it to the end: the last card says whether this is a visit. 01 Turn the range off at the breaker and leave it off. 02 Book a visit so the supply connection can be checked; do not open the junction box yourself. ### Still there? It usually turns into [surface element and glass top repair](https://rangerepair.center/services/surface-element-and-glass-top-repair/). Book with the code and the model number. ### What not to do U 400 is not a board failure to be reset away; the fix Hestan gives is correcting the power supply connection. ## What you may notice with it. The range problems U 400 tends to arrive with. Answer these at the range before anyone is booked. [All problems](https://rangerepair.center/problems/) Before you call ### [Range Keeps Tripping the Breaker](https://rangerepair.center/problems/range-tripping-breaker/) [All 6 causes, cheapest first](https://rangerepair.center/problems/range-tripping-breaker/) It also comes with - [**Range Surface Element Not Heating**](https://rangerepair.center/problems/surface-element-not-heating/) - [**Range Error Code**](https://rangerepair.center/problems/range-error-code/) Gas, fire or electrical risk ### Range Keeps Tripping the Breaker 6 causes, cheapest first Where U 400 usually leads ## Surface element and glass top repair. **Surface element, switch or glass top · low to moderate.** Book a visit [What the job involves](https://rangerepair.center/services/surface-element-and-glass-top-repair/) ## Hestan ranges. A California maker of professional-style gas and dual-fuel ranges with a restaurant-kitchen background. [Hestan range repair](https://rangerepair.center/brands/hestan/) More Hestan codes [ERR04](https://rangerepair.center/error-codes/hestan-range-err04/) [ERR20](https://rangerepair.center/error-codes/hestan-range-err20/) [ER01](https://rangerepair.center/error-codes/hestan-smart-burner-er01/) [ER03](https://rangerepair.center/error-codes/hestan-smart-burner-er03/) [ER05](https://rangerepair.center/error-codes/hestan-smart-burner-er05/) [ER06](https://rangerepair.center/error-codes/hestan-smart-burner-er06/) [Er 03](https://rangerepair.center/error-codes/hestan-induction-er03/) [Er 47](https://rangerepair.center/error-codes/hestan-induction-er47/) [E2](https://rangerepair.center/error-codes/hestan-induction-e2/) [E6](https://rangerepair.center/error-codes/hestan-induction-e6/) [E8](https://rangerepair.center/error-codes/hestan-induction-e8/) Surface elements and induction on other makes [AGA E2](https://rangerepair.center/error-codes/aga-e2/) [BlueStar E2](https://rangerepair.center/error-codes/bluestar-induction-e2/) [Bosch F1](https://rangerepair.center/error-codes/bosch-f1/) [Café Flashing ON indicator](https://rangerepair.center/error-codes/cafe-on-indicator-flash/) [Electrolux F40](https://rangerepair.center/error-codes/electrolux-f40/) [Frigidaire F40](https://rangerepair.center/error-codes/frigidaire-f40/) [GE Profile Flashing power setting](https://rangerepair.center/error-codes/ge-profile-flashing-power/) [ILVE E5](https://rangerepair.center/error-codes/ilve-e5-e6/) [All 36 codes of this kind](https://rangerepair.center/error-codes/#family-surface) Hestan builds this ### Gas range Open flames on top and a gas-fired oven below, all fed by one supply line behind the range and lit by igniters rather than a match. Hestan builds this ### Dual-fuel range Gas burners on top and an electric oven below, the combination most professional-style ranges use, needing both a gas line and a 240-volt circuit. Hestan builds this ### Induction range A glass top that heats the pan itself through copper coils and power boards, over an electric oven, with electronics doing almost all the work. ## In Hestan's own words > Power supply on inlet too high [Hestan KRI induction range use and care manual, induction error codes](https://cdn.bfldr.com/W2HABDQZ/as/7w5cbv9wcvc65vf39wrsqw47/034584_RevB) [Hestan KRI induction range use and care manual, induction error codes](https://cdn.bfldr.com/W2HABDQZ/as/7w5cbv9wcvc65vf39wrsqw47/034584_RevB) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Hestan KRI induction ranges. ## Hestan U 400 range repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Turn the range off at the breaker and leave it off. If it comes back, it needs a visit. ### My new Hestan induction range beeps constantly and shows U 400. What happened? U 400 means the range sees too high a voltage at its inlet, which points at how it was connected. Switch it off at the breaker and have the connection checked before using it. ### Will a breaker reset clear U 400 on my Hestan? It may clear the display, but the code comes back as long as the supply connection is wrong. Hestan's remedy is to correct the connection. --- **[Read on the site: Hestan induction range showing U 400 | RangeRepair.center](https://rangerepair.center/error-codes/hestan-induction-u400/)** **[Book a visit with RangeRepair.center](https://rangerepair.center/schedule/)**