The short answer
This code is paired with a machine that will not run while all of its indicators are lit. A console showing everything at once is not reporting every fault at once — it is a display state, usually a control that has stopped part way through its own start-up or a panel being read as pressed everywhere. One power cycle at the breaker is the place to start.
Whirlpool dishwasher code as the manufacturer publishes it
Reference| Code | Meaning |
|---|---|
| 1-2 | Won't Run and All LEDs On |
What you observe alongside the code
- Every indicator on the console lit at once — A display state, not a fault list.
- No response to any key press — The control is not getting as far as reading the panel.
- It appeared after a storm or a breaker trip — A supply disturbance interrupting the start-up.
- It clears on a power cycle and returns later — Points at something intermittent rather than dead.
What triggers it, most likely first
- A control that stopped part way through start-up — First: the lights are on because nothing has yet turned them off, and a power cycle is the documented sort of remedy for exactly that.
- A supply disturbance or an interrupted cycle — Second: a sag or a trip mid-start leaves the control in a state it cannot leave by itself.
- A panel being read as pressed across several keys — Third: water on the console or a wet cloth left across it does this, and it clears when dry.
- A failing control or user interface board — Last: the reading left when a power cycle changes nothing at all.
Check in this order, and why
- Cut power at the breaker for a full minute and restore it — The first and cheapest action, and it resolves the transient cases.
- Dry the console and its edges — A wet panel produces this display and costs nothing to rule out.
- Check the breaker has not partly tripped — A machine on a marginal supply can hang at start-up.
- Note whether it returns, and how soon — The interval is the only diagnostic this state offers.
Clearing the code, then the owner-safe checks
- Switch the breaker fully off for a minute, then fully on — Clears the latched start-up state.
About 5 min
- Dry the console face and the door edge above it — Water at the panel is a cause you can remove.
Tools: clothAbout 10 min
- Try one short cycle and note what the console does — A clean start-up sequence means the control recovered.
About 15 min
- STOP HERE if the display returns immediately every time — That is the control or the interface board, behind the door panel.
Before you open anything
Safety
Unplug the dishwasher or switch off its breaker before removing the toe panel or the inner door panel. A capacitor can hold a charge after the power is off, and the supply is not switched at the door. Bail any standing water out of the tub before working underneath, and go into the sump with gloves and a light — broken glass collects there.
When this code is a service call
Call when a power cycle changes nothing, or when the state returns within minutes every time: the control and the user interface board both sit behind the inner door panel and neither is an owner repair. There is no hazard while the machine is inert — nothing is heating and nothing is filling — so it is reasonable to leave it isolated at the breaker until someone attends.
Neighbouring Whirlpool dishwasher codes
Which model lines this reading applies to
This reading of 1-2 applies to Whirlpool-built built-in dishwashers of the generation whose service documentation publishes this code, which is where the manufacturer documents it. A machine with a mechanical timer and no diagnostic display does not produce it, and the same characters can be published against a different fault on a KitchenAid or Maytag-badged unit from the same platform. Console layouts and start-up sequences differ across this platform, so what a normal power-up looks like is model-specific. Where a model-specific page exists for your unit it is linked above and is the more specific answer: component resistances, connector positions and part numbers differ by family and belong there.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
