The short answer
F9 is the control reporting that it could not carry out what it was asked to do, with the Appliance Control Board and its wiring named. Unlike a sensing code, this one is about the board that switches things rather than the thing being switched. Power the appliance down and see whether it returns: a code that stands after a reset is a service call.
Code table
Reference| code | meaning | owner-checkable |
|---|---|---|
| F9 | The oven could not execute the function. There may a problem with the Appliance Control Board, the Relay Control Board, or the associated wiring. | no |
| F8E5 | The oven could not execute the function. There may a problem with the Exhaust Air Temperature Sensor, or the associated wiring. | see page |
| F9-1 | There may be a problem with the Oven Door Latch, the Door Lock Switch, or the associated wiring. | see page |
What you observe
- A function starts, then aborts — The selection is accepted and then dropped mid-step.
- Relays click repeatedly, or not at all — Either extreme points at the switching stage, not the load.
- NEAR MISS — the panel is dead and unlit — A blank panel is a supply question and belongs on another page.
Likeliest causes first
- A genuine fault on the Appliance Control Board — First, because this code names the board rather than something it reads: relay contacts and their drivers carry load, and load is what wears them.
- The harness between the boards — Second: the relay control board talks to the interface and the relay stage through connectors, and a dirty one imitates a board fault exactly.
- A supply disturbance that latched a state — Last, but it is why the power cycle comes first — a brownout mid-cycle leaves a control reporting a fault it no longer has.
Check in this order
- Cut the breaker, then retry the same function — Free, and it splits the three causes at once: a code that stays away was a state.
- Note exactly which function fails — Bake, broil, clean and convection use different outputs of the relay control board.
- Leave the board itself to a meter — Boards are judged by output with the load on and off; a scorched-looking board is not always the failed one.
Owner-safe steps
- Record the code, then cut power at the breaker for a minute — The one diagnostic an owner can run on a control fault, and its result is genuinely informative.
About 5 min
- Try each cooking function once afterwards — One failing function means one output stage; all of them means the shared control.
About 20 min
- STOP HERE — board work is behind the panel on live-adjacent circuits — Nothing beyond the reset and that observation is an owner job here.
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. An oven carries a heavy element circuit behind the rear panel, and the cavity stays dangerous long after the heat is off. Leave the door lock and its switch wired exactly as they are.
When to call
Call as soon as the code survives a power cycle. A relay control board is among the dearest parts in the appliance, which is exactly why nobody should fit one on the strength of a code: the job is to prove the board rather than the harness or the load before it is ordered. Ask for the failed output to be named — a board changed without that is a board changed on a guess.
Neighbouring codes — F8E5 and F9-1 appear beside F9 in the table and are recorded against different hardware — different questions with different answers. A shared prefix on this brand is not a shared fault.
What this page does not cover
Read this as the class-level answer. The meaning of F9 here is the one the shared Maytag oven table publishes, which applies to the model lines that use that table and to no others; a family- or model-specific page, where one exists, is linked below and outranks this one for your unit.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
