KitchenAid Induction Cooktop Code E91: let it cool, reset the power and watch for a minute

What E91 means

An E91 on a KitchenAid induction cooktop, for example the KICU509XSS, is another power-reset code. The cooktop asks you to wait until it has cooled, then restore power and monitor it for a minute to see whether the code stays away. Owners notice zones that will not heat and a display stuck on E91 until power is cycled. Until power is cycled, the cooktop generally stays idle.

Common causes of E91

A brief control hiccup that a reset resolves
Electronics that overheated and need to cool
Unstable household voltage at the cooktop
A failing control board that repeats the code

✓ One safe check you can try

1. Switch off all zones and wait for the cooktop to cool. 2. Shut the dedicated breaker for roughly a minute, then turn it back on. 3. Stand by for one minute and confirm the display is clear. 4. If E91 returns, do not keep resetting, and call us instead.

! Why to stop there

Resetting again and again hides a pattern that matters to the repair.
Board and supply tests need live meter work, which we do not ask owners to attempt.
Expect a quote in writing before we touch anything, plus a 30-day guarantee afterward.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Cooktop codes

FC E0KitchenAid Induction Cooktop Code FC E0: supply, wiring or the induction module FC E1KitchenAid Induction Cooktop Code FC E1: touchpad or the cable behind it FC E4KitchenAid Induction Cooktop Code FC E4: the harness between touchpad and induction module FC LFKitchenAid Induction Cooktop Code FC LF: left front zone, its coil or its wiring FC LRKitchenAid Induction Cooktop Code FC LR: a left-side zone that will not heat FC RFKitchenAid Smoothtop Cooktop Code FC RF: right front area, element or wiring FC RRKitchenAid Induction Cooktop Code FC RR: the right rear zone does not respond H - Residual HeatKitchenAid Induction Cooktop H: Residual Heat Indicator

E91E91 questions

Is E91 serious?

It can be a one-off. The cooktop wants a cool-down and a power reset. If the code stays gone for a minute after that, you are fine. If it returns, the control needs attention.

Why does the cooktop ask me to wait first?

Heat may have triggered the code, so a cool-down gives the electronics a chance to recover. Restoring power on a hot cooktop could bring the same code straight back.

Should I tell you the number when I call?

Yes. E91 sits next to E90, E92 and E93, and the specific code helps us prepare. Please also say when it appears: during cooking, at startup or at rest.