E40 and U400 are the same power supply error on a range. No reset is listed; book a service repair.
Model compatibility: Fisher & Paykel reuses codes across series and model years, so E40 / 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
The manufacturer lists E40 and U400 on freestanding cookers as a power supply error.
Both E40 and U400 appear in the Fisher & Paykel freestanding cooker list beneath the same title, power supply error. Why there are two spellings is left unexplained.
Where the guide runs out
Three kinds of fault get their own remedy in the how-to-fix part: a locked door, induction cookware, and electronic board or software trouble. Neither E40 nor U400 is one of them. They land in the catch-all for every remaining fault code, and the catch-all offers one thing, a booked service repair.
What follows from that
A cool-down reset is not offered, so please do not devise one.
The page cautions against switching the supply off without being told to, because a sudden power cut can hurt an oven that is hot.
In the code name, “power supply” labels the fault. The source does not blame the circuit in your house.
Safe to observe
Looking is fine; removing the rear panel of the range is a technician’s task.
Prepare for the call
The support page asks you to keep the fault code to hand. For this pair, also note whether E40 or U400 was displayed, and if the range had been heating at that point.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Fisher & Paykel appliance?
Book a specialist visit for a clear estimate and approval before any repair.
