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Error code reference
Wolf Cooktop Error Code U400
Over voltage condition detected at the power supply.
SourceWolf Service Manual: ICB CI Induction Cooktop: Service Manualp. 4-6
Diagnostic procedure
The full U400 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
1. Test L1 to Ground and L2 to Ground ≤ 132 VAC. 2. Test L1 to L2 ≤ 265 VAC. 3. Confirm single phase circuit. 4. If electrical problem report issue to consumer. 5. If no issue found replace generator.
SourceWolf Service Manual: CI Induction Cooktop: Service Manualp. 4-6
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
5 manuals in the MyPros+ library document this code for Wolf cooktop.
Models covered by the manuals that document this code
- CE152T/S
- CE152T/S/208
- CE152TF/S
- CE152TF/S/208
- CE304C/B
- CE304C/B/208
- CE304T/S
- CE304T/S/208
- CE304TF/S
- CE304TF/S/208
- CE365C/B
- CE365C/B/208
- CE365T/S
- CE365T/S/208
- CE365TF/S
- CE365TF/S/208
- CG152T/S
- CG152T/S/LP
- CG152TF/S
- CG152TF/S/LP
- CI152T/S
- CI152TF/S
- CI243C/B
- CI243T/S
More models are covered than are listed here.
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