Gaggenau cooktop
showing U400
U400 is a second Gaggenau code for incorrect supply voltage.
Mon–Sat, 8am–8pm
- Induction power and coils
- Induction board and coil repair
- Source: Gaggenau
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What U400
actually means.
U400 is a second Gaggenau code for incorrect supply voltage. The circuit, not the cooktop, is the first suspect.
Gaggenau cooktop display
What to do when U400 shows on the cooktopKind of codeInduction power and coils
An induction zone could not drive its coil as the board planned: no pan was detected, the current ran too high or too low, or the power stage reported trouble. The pan base, the supply voltage and a clogged air intake are checked before the coil or the power board is replaced, and a top that trips its breaker is left switched off until then.
Usually leads toInduction board and coil repair
Induction zones that stop sensing pans, cut out, buzz or show codes, traced to the power boards, the coils, their sensors and the links to the controls.
Shows up asCooktop Tripping Breaker
The circuit breaker for the cooktop trips as a burner or zone switches on, at one particular setting, or a few minutes into cooking.
MakeGaggenau
A German luxury maker, part of the BSH group, known for built-in cooking sold into custom kitchens.
SourceGaggenau CI 292 602 induction cooktop use and care manual (en-us), Troubleshooting
From the troubleshooting table of Gaggenau's US manual for the CI 292 602 200 series induction cooktop; the codes are printed in a display typeface and were read from the rendered page.
Before you book,
in this order.
Each step comes from Gaggenau's own guidance for U400 on its cooktops. Follow it to the end: the last card says whether this is a visit.
Turn the breaker off and leave it off.
Leave the junction box to the electrician rather than opening it yourself.
Get the supply checked; book a visit if it is normal and U400 persists.
Still there?
It usually turns into induction board and coil repair. Book with the code and the model number.
What not to do
U400 is not cleared by switching zones or pans. The circuit is the first suspect, not the zones.
What you may
notice with it.
The cooktop problems U400 tends to arrive with. Answer these at the cooktop before anyone is booked.
All problems
Cooktop Tripping Breaker
6 causes, cheapest first
Where U400 usually leads
Induction board and coil repair.
Gaggenau
cooktops.
A German luxury maker, part of the BSH group, known for built-in cooking sold into custom kitchens.
Gaggenau cooktop repairMore Gaggenau codes
All 14 Gaggenau codesInduction power and coils on other makes
In Gaggenau's own words
The supply voltage is incorrect. It is outside the normal operating range.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. From the troubleshooting table of Gaggenau's US manual for the CI 292 602 200 series induction cooktop; the codes are printed in a display typeface and were read from the rendered page.
Gaggenau U400 cooktop 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?
Why does my Gaggenau show U400 instead of E9000?
Can a new countertop install cause U400?
Is U400 on a Gaggenau more serious than E9000?
Back to your everyday
Still showing U400?
Book with the code copied exactly, the full model number, and whether there is any smell of gas or burning — with a code in hand, that is where the diagnosis starts.