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Error Code

Fisher & Paykel Cooktop U400

When U400 appears on a Fisher & Paykel Cooktop, the safest path is: observe, do only the listed checks, then stop if the code returns. Platform context: Induction cooktop — fault codes.

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Reviewed by Ethan Cole · Last reviewed August 10, 2026

Ethan Cole Written by Ethan Cole Appliance Repair Content Specialist Published August 10, 2026 Updated August 11, 2026 Technically reviewed August 10, 2026

Content status: Verified

Error code U400
Appliance Cooktop
Affected model series Induction cooktop — confirm the rating-plate model before acting
Quick answer

Fisher & Paykel Cooktop alert U400: typical presentation, safe checks, and when to call an independent tech.

Model compatibility: Fisher & Paykel reuses codes across series and model years, so U400 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Summary for U400 (Induction cooktop — fault codes). Independent repair notes only — not a substitute for the current Product Help article or tech sheet for your serial.

Signs

Symptoms you may notice

  • The induction cooktop display shows U400 during or after use.
  • One or more cooking zones may stop heating, cycle on/off unexpectedly, or refuse to start while U400 is shown.
  • An audible alert or flashing zone indicator may accompany the U400 display.
Before you call

Safe checks you can make

These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.

  • Let the cooktop cool fully, then wipe the glass surface clean and dry — spills, moisture, or metal objects near the controls can sometimes affect touch controls.
  • Confirm only induction-compatible cookware of a suitable size is centered on the zone.
  • Switch the cooktop off at the wall or breaker, wait a few minutes, then restore power and retry once.
  • Check that nothing is obstructing the ventilation gap under or around the cooktop.
  • Record the full model and serial number from the rating plate.

Important safety warning. Do not open the cooktop body, access wiring or the control/power electronics beneath the glass, or attempt to repair a cracked ceramic/glass surface yourself. If you notice smoke, sparks, arcing, or a burning smell, switch off power at the wall or breaker if safe to do so and call a professional immediately.

Get help

When to call a technician

When U400 keeps coming back on your Fisher & Paykel Cooktop, stop repeating cycles and request a visit from Fisher & Paykel Appliance Repair. We confirm the reading against your exact model before recommending parts.

Code still active?

Have this Fisher & Paykel alert verified on site

Repeating fault codes usually need platform-specific testing. We confirm the cause and price the fix before work begins.

FAQ

Frequently asked questions

References

Sources & references

Code still active?

Have this Fisher & Paykel alert verified on site

Repeating fault codes usually need platform-specific testing. We confirm the cause and price the fix before work begins.

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Address 1200 Brickell Ave, Suite 400, Miami, FL 33131
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