The reading in two sentences
E91 on this cooktop means the manufacturer answers this code with an instruction rather than a description: power the unit down at the circuit breaker for one minute — that is what the manufacturer published for it, and no more. Carry out the published reset once; if the cooktop then works normally you can use it, and if the code returns at once stop. One of the checks below is an owner check, and the rest of the work is behind a panel.
Error codes
Reference| Code | Meaning |
|---|---|
| E91 | Power unit down by turning off the circuit breaker(s) for one (1) minute. |
What else is happening when this shows
- The cooktop behaved normally until a power interruption — A blip during a cycle or at power-up is the commonest context for a latched condition.
- The code comes back immediately after the reset — That is the important observation: an instantly returning code is live rather than stored.
- NEAR MISS — the appliance is dead with no display — No display at all is a supply fault, not a code, and it is checked at the breaker.
What triggers E91, most likely first
- A condition held from the last power-up sequence — It goes first because the published answer is a power cycle at the breaker: a control that did not complete its start-up sequence holds the condition until the supply is genuinely removed, which is precisely what the remedy undoes.
- Anything on the control surface at the moment of start-up — A cloth or a spill across the panel while the control is reading its keys is enough to leave it in a state it will not clear until the supply is broken.
The order to work through
- Check the breaker you are switching is the cooktop one — A cooktop is a fixed connection, and a reset on the wrong breaker looks exactly like a reset that did not work.
- Carry out the published reset exactly once and note what happens — One minute at the breaker, then watch the whole power-up rather than pressing keys.
- Time how long the cooktop stays clear afterwards — Immediately, hours or days: that answer is the diagnosis.
The reset and the checks that follow it
- Use the appliance normally once and note the result — Normal operation after a reset is the evidence you need that the code was stored rather than live.
About 45 min
- Switch the cooktop off at the circuit breaker for one minute, restore power and use it normally once — A full minute, not a flick, and one cooking session afterwards rather than a series of resets.
About 10 min
- Keep a short note of every appearance — Date, stage and what else was running. Two or three lines is enough to turn guesswork into a diagnosis.
About 5 min
- STOP HERE — do not repeat the reset indefinitely — A code that returns each time is live. Resetting round a live fault hides it rather than fixing it.
Before a panel comes off
Safety
Isolate the cooktop at its circuit breaker before any panel comes off — a capacitor can hold a charge after the power is off, and this is a fixed high-current appliance rather than one you unplug. Put nothing cold or wet on hot glass. On a gas model, if you smell gas, leave the building and call the gas utility from outside.
Where an owner check ends
Call with your notes rather than with the code alone.
Other codes on a KitchenAid cooktop
What is deliberately not here
Treat this as the general KitchenAid cooktop reading. It stops short of anything model-specific — part numbers, harness colours, connector layouts and service-mode entry — because those differ by family and a technician takes them from the rating plate rather than from a code. A family- or model-specific page, where one exists, is linked from the code index below and is the closer answer.
Links: - [KitchenAid cooktop error codes](/blog/kitchenaid-cooktop-error-codes)
Next steps
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
