What E91 Means
Induction Cooktop: KitchenAid keeps a live page for E91 and it contains no description of the fault. There is the code as a heading and a reset procedure beneath it, and nothing that says what the cooktop was measuring or which part it is complaining about. That gap is left open here rather than filled from elsewhere. E91 sits in a short run of induction codes - E90 through E93 - all published the same way, with procedures and no meanings, which suggests they are distinctions the firmware makes and the consumer pages do not explain.
Common Causes of E91
- A condition the cooktop reports as E91 without KitchenAid publishing what it is
- A transient state that a full one-minute power interruption may clear
- A repeatable hardware fault, which is what a code surviving a proper reset suggests
🔧 One Safe Check You Can Try
Switch the cooking areas off and let the glass cool before going to the breaker panel. The published procedure is to power the unit down by switching off the circuit breakers for one minute, power it back up, wait for the cooktop to cool down before using it again, then watch it for a minute to confirm the code does not return and verify it operates. If E91 comes back, write the code down exactly - it is the only specific information anyone will have to work from.
⚠ Why You Shouldn't Go Further Than That
- An undocumented code gives nothing to reason from, so any part ordered against E91 is ordered on hope rather than evidence.
- Induction power boards switch high currents and retain charge after the supply is cut, so the space under the glass stays hazardous after the breaker is off.
- The glass top is bonded and sealed into the countertop, which means even looking at those boards starts with removing the appliance from above.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.