The short answer
F43 names the cooktop power control board or the wiring to it — the board that switches mains current into the induction coils. The panel usually behaves perfectly, which is what distinguishes this from a touch code: what you ask for is understood and not delivered. Work down the diagnostic order before anything comes apart; the ranking is the part of this page worth the most.
Error codes
Reference| Code | Meaning |
|---|---|
| F43 | There may be a problem with the Cooktop Power Control Board, or the associated wiring. |
What you observe, and what to record
- The panel responds and zones do not heat — Understood, not delivered. The signature of a power-side fault.
- Whether the kitchen was unusually warm or humid — Marginal connections and temperature protections both behave differently in a hot room, and a fault that only appears in summer is telling you that.
- How long the ${A} runs before the code appears — Immediately from cold, or well into a session — that interval is the most useful single number you can hand a technician.
Causes, most likely first on this cooktop
- A power connector or terminal that has failed under load — First: these carry the largest currents in the appliance, and a joint that has relaxed heats, discolours and eventually opens. It is cheap to fix and common to find.
- A failed switching device on the board — Second: the devices that chop current into the coils are the hardest-worked components in the cooktop and they take out one zone at a time.
- A coil or its wiring faulting and being reported — Third: a shorted coil makes a healthy board report exactly this, and the board gets replaced for nothing.
Check in this order, and why
- Map every zone at low and high power — A per-zone pattern is what separates a device from a board.
- Confirm the panel itself responds normally — It usually does, and establishing that removes the whole touch side.
- Note anything that heats without being asked — The one finding that changes the urgency completely.
What an owner can safely check
- Test every zone with the same pan at two power levels — Write it down. The map is the diagnosis.
Tools: pan of waterAbout 25 min
- Copy the full model number from the rating plate — Brand code indexes are shared across model lines, and the model number is what lets the code be read against the right one.
About 10 min
- Keep a short log of when the code appears — Date, what the cooktop was doing, and how long it had been running. Two entries make a pattern; one does not.
About 5 min
- STOP HERE — the power board is under the glass — Reached from below and carrying mains current to every coil.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. Do not pour water onto hot glass to cool it and do not work on a top that is still warm: thermal shock cracks a ceramic surface, and a cracked top takes the whole appliance out of service.
When to call a technician
Call promptly, and immediately if a zone heats when it has not been asked to — switch the circuit off at the breaker and leave it off in that case. Otherwise, call with your zone map: which zones work, at which power levels, is the fastest way to tell a connector from a device from a board. Write down what you have already tried. It stops a visit repeating the checks you have done and starting from the beginning.
Nearest Jenn-Air cooktop codes
What this page does not cover
This page reads F43 for Jenn-Air cooktops in general, from the manufacturer's shared code index. A code can be documented differently for one family, so where a model-line page exists for your unit it is the more specific answer and is linked below. Not here: wiring colours, connector positions and part numbers, which differ by family.
Links: - [Jenn Air Cooktop Error Codes](/blog/jenn-air-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.
