Wolf induction stove
showing U400
U400 on a Wolf IR series induction stove means over voltage.
Mon–Sat, 8am–8pm
- Control board and power
- Control board and display repair
- Source: Wolf
Book a visit
Three short steps, about a minute.
or call (844) 415-7620
Loading appointment form…
The appointment form couldn’t load. Please try again.
What U400
actually means.
U400 on a Wolf IR series induction stove means over voltage. The stovetop refuses to heat while the voltage reads too high.
Wolf stove display
What to do when U400 shows on the stoveKind of codeControl board and power
The main board failed its own start-up check, lost contact with the display, or saw the supply voltage sag too low, often after a storm, a power outage or a spill that ran down behind the panel. The breaker, the cord and the outlet are ruled out before a board is replaced. A stove that sparks, smells of hot wiring or keeps heating while this code shows is switched off at the breaker first.
Usually leads toControl board and display repair
Stoves with a blank or flashing display, touch keys that do not answer, codes that keep returning or a stove that will not turn on, traced to the board, the keypad or the power to them.
Shows up asStovetop Not Heating
The burners on an electric, glass or induction stovetop stay cold or warm up only a little, sometimes all of them and sometimes two on one side, while the oven below may still work.
MakeWolf
A Sub-Zero Group cooking brand from Wisconsin; owners often know it on sight by its red knobs.
SourceWolf answer: IR induction, U400
Wolf IR series induction stoves. Wolf's newer induction models use a separate list.
Before you book,
in this order.
Each step comes from Wolf's own guidance for U400 on its stoves. Follow it to the end: the last card says whether this is a visit.
Turn all zones off.
Cut the breaker for 30 seconds before restoring power.
If U400 returns, have the supply checked and book a visit before cooking on it again.
Still there?
It usually turns into control board and display repair. Book with the code and the model number.
What not to do
U400 is not a sign the coils are worn. The stovetop is protecting itself from its supply.
What you may
notice with it.
The stove problems U400 tends to arrive with. Answer these at the stove before anyone is booked.
All problems
Stovetop Not Heating
6 causes, cheapest first
Where U400 usually leads
Control board and display repair.
Wolf
stoves.
A Sub-Zero Group cooking brand from Wisconsin; owners often know it on sight by its red knobs.
Wolf stove repair
Gas stove
A stove with gas burners on top, whether its oven below runs on gas too or on electricity, fed by one gas line behind it and plugged into a wall outlet for the spark.
Induction stove
A stove with a flat glass top that heats the pan itself through a magnetic field, run by touch keys and power boards, with an electric oven underneath.
In Wolf's own words
Over voltage
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Wolf IR series induction stoves. Wolf's newer induction models use a separate list.
Wolf U400 stove 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 U400.
Can I clear U400 myself?
My new Wolf induction stove showed U400 on day one. Why?
Can I keep cooking on my Wolf induction stove if U400 goes away by itself?
Is U400 on a Wolf stove the same as E6?
Back to your everyday
Still showing U400?
Book with the code written exactly as the stove shows it, the full model number, and whether you notice any smell of gas or hot wiring — when there is a code, that is where the diagnosis starts.