Error code
Wolf induction range error code E40
Wolf error code E40: the induction generator — the power stage under the glass that actually does the heating — has reported an error, on an induction range, where the cooktop is a power electronics assembly and the oven below it is conventional. What the code covers, what to check first, and what it does not tell you — on ranges.
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What we can confirm
Code E40, from the manufacturer's own documentation
A code is only meaningful together with the generation showing it — the same two digits mean different things across generations, and that is the commonest reason a code looked up online leads somewhere wrong. This one is recorded on Induction range.
The code
E40
The induction generator — the power stage under the glass that actually does the heating — has reported an error, on an induction range, where the cooktop is a power electronics assembly and the oven below it is conventional
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What it narrows down to
0x33 = Sync error
What you are probably seeing
Diagnostic
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What it looks like from the kitchen
The symptom this code usually arrives with
A code names the subsystem; the symptom is what sent you to look at the display in the first place. That page says what it usually turns out to be, cheapest cause first.
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Protection, usually working correctly Induction zone shutting itself off
A zone that runs for ten minutes and stops, then works again once everything has cooled. That is a protection doing its job, and the useful question is what made it too hot rather than what is broken.
- A zone stopping mid-cook and restarting later
- Always the same zone, or always the same time
- A generator or heat sink condition on screen
On the same generation
What else belongs to the Induction range
A code belongs to a generation rather than to one cabinet. These are the other codes yours can show, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this generation can display
Right or Single oven PCM RS485 Network error
Right convection fan shorted
The UIM detects and error with the RS485 network
No published cause
Key error on the left secondary
LIN Communication Error
Primary is too hot
0x27 = Heat sink sensor failure
Left secondary control board is too hot
The same two digits mean different things across generations. Search the full code list
Models that can display this code
The number on the data plate decides which parts exist and how quickly they arrive. All models
In more detail
About Wolf induction range error code E40
What this one means
The induction generator — the power stage under the glass that actually does the heating — has reported an error, on an induction range, where the cooktop is a power electronics assembly and the oven below it is conventional. It is a code the manufacturer publishes for this appliance, not one we have worked out — and it is decoded here rather than left as three characters on a display.
What the code covers
A published cause names a circuit rather than a component, which is the single most useful thing to know before ordering a part. This one covers:
- The generator board itself and its heat sink
- The thermistor watching that heat sink
- The communication between the generator and the control
- 0x33 = Sync error
Worth doing before you call
- Check whether the oven still heats with the cooktop off, and the other way round
- Check the vents underneath and around the appliance are clear
- Let it cool completely before switching it on again
Then what
On induction, the code belongs to the module rather than to the badge: the same generator is fitted under several makes' glass, and a number here can be answered in another maker's manual. It is still this appliance's part.
This code is published for ranges. The full list of codes has the rest of them, searchable, including the labels older and newer machines use for the same conditions.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards