Fisher & Paykel Cooktops U Error: Pan not detected
Fisher & Paykel cooktop error code U is a low-severity fault meaning Pan not detected on induction zone. U is a standard operational indicator, not a fault requiring repair. U cannot be reset — it clears automatically when the zone detects a compatible pan.
~90%
DIY Fixable
From $0
Typical Repair Cost
5 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. U is a standard operational indicator, not a fault requiring repair. As long as compatible, flat-based ferrous cookware is used and U clears when the pan is placed, the cooktop is functioning correctly.
Can I reset the code?
No. U cannot be reset — it clears automatically when the zone detects a compatible pan. If U persists with confirmed induction-compatible cookware, the zone detection circuit requires service.
When to stop immediately?
Stop if you notice: U persists with multiple confirmed-compatible pans on the same zone, Zone previously worked with the same pans but U now appears unexpectedly.
Symptoms You May Notice
U flashes on zone display
The selected induction zone flashes U and does not heat, even though a pan appears to be in place.
Zone activates intermittently
The zone heats for a few seconds, then U appears and the zone cuts out as the pan shifts slightly.
Power level cannot be set
Adjusting the power level has no effect while U is displayed — the zone remains off until a compatible pan is detected.
Possible Causes
Non-ferrous cookware
The pan is made from aluminium, copper, glass, or non-magnetic stainless steel — materials that cannot generate eddy currents in an induction field.
DIY PossiblePan base too small
The cookware base diameter is below the minimum threshold for that zone, typically 12 cm, preventing reliable detection by the coil.
DIY PossibleWarped or uneven pan base
A heavily warped pan base makes intermittent contact with the glass, causing the detection circuit to lose and regain the pan signal.
DIY PossiblePan detection circuit fault
The inverter's pan detection circuit has failed, preventing detection of even a correctly sized ferrous pan.
Requires ProfessionalSafe Checks You Can Do
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1
Test cookware compatibility
Hold a magnet against the base of the pan. If the magnet sticks firmly, the pan is induction-compatible. If it does not stick, the cookware is not suitable for induction cooking.
A weak magnetic attraction (magnet sticks but pulls away easily) indicates insufficient iron content — the pan may not generate enough inductive coupling.
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2
Check pan base diameter
Measure the flat base diameter of the cookware. Fisher & Paykel induction zones typically require a minimum base diameter of 12 cm. Use a larger pan if needed.
The raised ring marking on the glass-ceramic surface indicates the recommended minimum pan size for each zone.
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3
Test pan flatness
Place the pan on a flat surface and check for rocking. If the base is warped, the pan cannot maintain consistent contact with the glass and will cause intermittent U codes.
Cookware that has been used on high gas flames often develops base warping. Replace warped pans.
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4
Test with known-good cookware
Try a different confirmed-compatible pan on the same zone. If U disappears, the original pan is incompatible. If U persists with known-good cookware, the zone has a detection circuit fault.
Borrow a pan from another induction cooktop as a quick diagnostic tool.
When to Call a Professional
Contact a qualified technician if:
- Pan detection circuit fault requires inverter board testing and likely replacement
- Persistent U with correct cookware on a zone that previously worked indicates an internal fault
Need Professional Help?
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