The short answer
F03 on this cooktop means there is an internal communication error on the touch control module — that is what the manufacturer published for it, and no more. Treat the cooktop as out of use while it stands: a module that cannot communicate cannot be relied on to switch zones off either. One of the checks below is an owner check, and the rest of the work is behind a panel.
Error codes
Reference| Code | Meaning |
|---|---|
| F03 | There is an internal communication error on the touch control module . |
What the machine does alongside the code
- Tones and lights continue while nothing responds — The module still has power, which is what makes this an internal error rather than a dead panel.
- The code appears at power-up before anything is selected — The two boards greet each other at power-up, and this code is that greeting failing.
What triggers F03, most likely first
- Condensation under the glass after a steamy session — It goes first among the causes you can act on: steam from a pan reaches the module area, and moisture across its connections produces an internal error that dries out and returns with the next big pan of pasta.
- A chafed or pinched ribbon or harness — The cable runs behind a panel that has been off at some point, and a conductor broken where it passes an edge produces exactly this code.
- A failed main control board — Last, and the reason the order matters: it is the most expensive part on the list and the least likely cause of a silent link.
Check in this order, and why
- Let the cooktop cool and dry fully, then reset and retest — Recovery on drying is both the diagnosis and, for that version, the repair.
- Cut power at the breaker for a full minute, then watch the power-up — Stored and live errors behave differently from this point on.
- Note whether the fault follows heavy cooking or steam — A pattern that tracks use points at the environment under the glass.
- Body: Clear the stored fault before inspecting anything — half of these codes are a handshake that failed once, and a power cycle tells you which half you are in.
The reset, then the owner-safe checks
- Record what the panel does and what the machine does not — Two lists, side by side. A technician can price the job from that note without guessing which board to bring.
About 10 min
- Power down for a full minute, restore power, and note whether the code appears before or after a selection — Write the answer down: it is the difference between a self-check failure and a command that did not land.
About 10 min
- Check the appliance is on its own outlet with no adaptor in the path — A sagging supply produces communication faults that look like a broken link.
About 10 min
- STOP HERE — the harness and the connectors are behind a panel — Reseating a connector means removing a panel and working next to live terminals. That is service work.
Before anything is opened
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.
When this is a service call rather than a reset
Call straight away if the panel is dead on one half, if you can see corrosion or water tracks behind it, or if the appliance will not act on any command.
Neighbouring codes on KitchenAid cooktops
What this page does not cover
This reading applies to the KitchenAid cooktop line as a whole, not to one family or model. It does not cover what differs between model lines — wiring colours, connector positions, part numbers and service-mode sequences — which are in your own model manual and which a technician matches to the rating plate rather than to this code. Where a family- or model-specific page for this code exists, it is linked from the code index below and it is the more specific answer.
Links: - [KitchenAid cooktop error codes](/blog/kitchenaid-cooktop-error-codes)
Where to go next
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
