The reading in two sentences
F25 on this cooktop means there is a problem with the power supply to the cooktop — that is what the manufacturer published for it, and no more. Stop using it: the appliance has judged its own supply unfit, and its zones draw heavily. One of the checks below is an owner check, and the rest of the work is behind a panel.
Error codes
Reference| Code | Meaning |
|---|---|
| F25 | There is a problem with power supply to the cooktop. |
What else is happening when this shows
- The code appeared after electrical work in the property — A disturbed connection is the commonest trigger and the most important to find.
- The code appears at the moment a heavy load switches on — Heating and motor starts are when a marginal supply shows itself.
- NEAR MISS — nothing works at all and there is no display — That is a dead supply rather than a marginal one, and it is a different check: breaker, then outlet.
What triggers F25, most likely first
- A loose or degraded connection at the terminal block — It goes first because it is both commonest and the one with a safety edge: a conductor gripped rather than clamped passes a light load and fails under a heavy one, which is the pattern here.
- Too much on one branch circuit — The appliance is designed for the supply the manufacturer specifies on its own circuit, and sharing the branch with another heavy load turns a healthy supply into a marginal one.
- A control board that misreads the supply it is given — It is last because it is the least likely, and the only way to reach it honestly is to prove the supply itself is sound first.
The order to work through
- Check whether the breaker warms or trips during use — Either is an electrician matter and neither should wait.
- Ask what electrical work has been done recently — A disturbed connection is the likeliest cause and the history costs nothing.
- Trace the appliance back to the wall by eye — Anything between the plug and the outlet — a strip, an adaptor, a long lead — is the first thing to remove from the picture.
- Body: Separate the appliance from the building first: one run with the rest of the circuit switched off answers more than any measurement.
The reset and the checks that follow it
- Reset the breaker once and watch it — Cut the breaker for a minute, restore it, and note whether the code comes back immediately or only under load.
About 5 min
- Switch the cooktop off at the breaker and leave it off until the supply has been checked — Do not keep cooking to see whether it manages: the zones are the load that exposes the fault.
About 10 min
- Write down when the code appears — What was in use, the time of day and what else was running. That note is what a technician or an electrician works from.
About 5 min
- STOP HERE — supply measurement is licensed work — Do not open an outlet or a terminal block to check a voltage. That is where an owner check ends.
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 as soon as the code survives a dedicated outlet and an otherwise idle circuit.
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.
