KitchenAid Dishwasher Error 2-1 — What It Means & How to Fix It

What Does This Error Mean?

Error 2-1 means the control board has detected a stuck relay — an electromechanical switch on the board that has become permanently open or permanently closed. Relays control power to major components like the wash motor, drain pump, and heater. A relay stuck in the wrong position prevents the dishwasher from correctly completing a wash cycle and almost always requires professional repair.

Affected Models

KDTM354DSS
KDFE104HPS
KDTE334GPS
KDTM604KPS
KDTE254ESS

Common Causes

Relay on the main control board has welded closed or stuck open from years of normal use
Power surge or voltage spike that burned or fused a relay contact on the board
Moisture or condensation entering the control board housing and corroding relay contacts
Control board component failure causing incorrect relay switching behaviour
Loose or corroded wiring harness connector feeding into the control board

How to Fix It

Turn off the dishwasher at the circuit breaker, wait 5 minutes, then turn it back on and attempt a cycle.

A hard power reset sometimes clears a transient relay state caused by a power fluctuation — it is worth trying before assuming the board is permanently damaged.
If 2-1 clears after the reset and the machine runs normally, monitor for recurrence over the next few cycles.

A relay that sticks intermittently will eventually stick permanently — note the frequency of errors to report to a technician if it returns.
Look under the dishwasher with a torch for any signs of water pooling near the control board, which is typically located at the bottom front of the machine behind the kick panel.

Even small amounts of water regularly reaching the board will degrade relay contacts over time. A visible water trail points directly to a leak as the root cause.
Check whether a recent power event — a storm, outage, or power surge — preceded the 2-1 error. A voltage spike is a common cause of relay damage.

If a surge is suspected, fit a surge protector on the dishwasher circuit going forward to prevent a repeat failure.
If 2-1 persists after a reset and no water ingress is visible, schedule a professional repair — the control board requires replacement.

Control boards for KitchenAid dishwashers typically cost $100–$250 in parts; a qualified technician can usually complete the installation in under an hour.

When to Call a Professional

Error 2-1 almost always requires professional repair — the stuck relay is inside the sealed control board assembly and cannot be repaired at home. A technician will test the board with diagnostic equipment and replace the control board if the relay fault is confirmed. Contact KitchenAid service or an authorised appliance repair company with your model number.

Frequently Asked Questions

What does a relay do inside a dishwasher control board?

A relay is an electrically controlled switch — the control board sends a small signal current to the relay coil, which magnetically closes a set of contacts to power a larger component like the wash motor or heating element. When a relay sticks, it either permanently powers a component that should be off, or permanently cuts power to a component that should be on. Either way the wash cycle cannot sequence correctly.

Can a relay be repaired rather than replaced?

Not in practice on modern dishwasher control boards. Relays are surface-mounted components on the board PCB and require specialist desoldering equipment to replace individually. The standard repair is to replace the entire control board assembly, which is faster and more reliable than attempting micro-soldering on a component that may have suffered wider board damage from the same event.

Will the dishwasher run at all with a 2-1 error?

It depends on which relay is stuck. If the relay controlling the wash motor or drain pump is stuck open, the machine will fail partway through a cycle. If a relay is stuck closed, a component may run continuously when it should not. In either case, do not attempt to keep running the machine — have it repaired promptly.