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.
Mon–Sat, 8am–8pm
- Surface elements and induction
- Surface element and glass top repair
- Source: Hestan
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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 rangeKind of codeSurface 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 toSurface 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 asRange 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.
MakeHestan
A California maker of professional-style gas and dual-fuel ranges with a restaurant-kitchen background.
SourceHestan 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.
Turn the range off at the breaker and leave it off.
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. 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
Where U 400 usually leads
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 repairMore Hestan codes
Surface elements and induction on other makes
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.
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.
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
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.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about U 400.
Can I clear U 400 myself?
My new Hestan induction range beeps constantly and shows U 400. What happened?
Will a breaker reset clear U 400 on my Hestan?
Back to your everyday
Still showing U 400?
Book with the code exactly as it appears, the full model number, and whether you notice any smell of gas or scorching — with a code, that is where the diagnosis begins.