Samsung Dishwasher Not Starting: Troubleshooting Guide

Press and hold Start for a full three seconds before you assume anything’s broken — most Samsung dishwashers that won’t start just need the door re-latched, Control Lock switched off, or the Start button held long enough to register. A tripped breaker or an accidental Delay Start setting explains most of what’s left.

Why Won’t My Samsung Dishwasher Start?

A Samsung dishwasher won’t start for a handful of predictable reasons, and the panel usually stays lit the whole time — it’s the cycle itself refusing to begin that throws people off. Rule out the door latch, Control Lock, and the outlet before you assume a part has failed. The door switch ends up being the most common paid part once the free checks are done; a stuck micro-switch has shut down more machines than any motor or control board, something that showed up again and again across 11 years spent repairing commercial food service equipment. Before you order anything, check the door latch, look for a locked padlock icon on the display, and confirm the outlet has power. If the dishwasher is also leaving water pooled after a cycle, that’s usually a separate drain issue worth checking on this cycle-length troubleshooting guide, and Samsung’s own official troubleshooting page covers the same basics if you want a second source to compare against.

Here’s how the likely causes compare before you start pulling panels:

Here’s a short video walkthrough covering the same door-latch, Control Lock, and Start-button checks in order:

Check the Door Latch and Control Lock First

A door that looks shut but isn’t fully seated will keep the whole cycle from starting, so work through these in order (my first instinct used to be checking the board, and more often than not the fix turned out to be this simple). This is the single most common reason a Samsung dishwasher won’t start, so don’t skip it:

1. Push the door shut with your palm flat against the panel and listen for the latch to click.
2. Look at the display for a small padlock symbol — that means Control Lock is active, usually because someone (or a curious kid leaning on the panel) held down buttons a little too long.
3. Press and hold the Control Lock button, usually located at the far left or right of the panel, for 3 seconds to clear it.

If the padlock icon disappears and the dishwasher still won’t respond when you press Start, don’t keep pressing that button over and over. Move on to the button-and-timer checks below instead — repeating a step that already worked once tells you nothing new, it just wastes time you could spend narrowing down the actual cause.

Samsung Dishwasher Not Starting: Troubleshooting Guide — step-by-step repair infographic

Test the Start Button and Delay Start Settings

Newer Samsung models with flat touch panels are notorious for this — a fast tap on Start does nothing, and it feels broken even though it isn’t. Run through this sequence before assuming a part has failed:

1. Close and firmly latch the door until you hear or feel the click.
2. Check the display for a lock icon and clear Control Lock if it’s showing.
3. Press Start and hold it for a full 3 seconds — don’t just tap it.
4. Watch for a beep or a change in the display indicating the cycle has begun.
5. If nothing happens, check whether Delay Start has been set by mistake and cancel it.
6. Try selecting a different wash cycle, then press Start again in case the previous cycle selection was stuck.

If you go through all six steps and the dishwasher still won’t start, the problem has moved past a settings issue and into wiring, switches, or the control board. There’s no point repeating the sequence a third or fourth time at this stage — grab a multimeter and move on to the power and door switch checks below.

Check Power, Breakers, and the Door Switch

A completely dark panel points to a power problem, not the control board. Work through these checks in order before you open anything up:

1. Check the breaker panel and reset any tripped breaker feeding the dishwasher circuit.
2. Check the GFCI outlet under the sink or in a nearby cabinet and press Reset if the button has popped.
3. Confirm the dishwasher’s power cord connection is fully seated if it’s a plug-in install.
4. If the panel lights up normally once power is restored, move on to the door latch switch below.

If the panel lights up but the cycle still won’t begin, the door latch switch is where I’d look next. This small switch confirms the door is closed before it lets the control board send power to the wash motor, and it fails often enough that I keep a couple of spares on hand for service calls. Here’s how to test it:

1. Unplug the dishwasher or shut off the breaker before opening any panels.
2. Remove the inner door panel screws to access the latch assembly.
3. Locate the door switch, usually a small plastic module near the latch mechanism.
4. Disconnect the wire connector and set a multimeter to continuity mode.
5. Press the switch plunger by hand and confirm the meter shows continuity.
6. Replace the switch if it fails to click or shows no continuity when pressed.

If the dishwasher also isn’t spraying water well once it does run, that’s a different part entirely — this guide on weak or no spray walks through the spray arm and pump checks separately from the no-start issue.

Common Mistakes That Make This Harder to Diagnose

The biggest mistake I see is ordering a control board before testing anything with a meter. Boards are the most expensive part on this list and the least common cause, so buying one first almost guarantees you’ll spend money without fixing the problem. The second mistake is assuming a dark panel means the whole unit is dead — check the breaker and GFCI outlet before you touch a single screw, since those take seconds and cost nothing. The third is repeating the same free check (re-latching the door, clearing Control Lock, tapping Start) over and over instead of moving down the list once it’s confirmed to work or not work. Work through the checks once, in order, and note what actually changes on the display each time — that’s the fastest way to land on the real cause instead of guessing.

When Should I Call a Repair Technician Instead?

If you’ve confirmed the door latches, Control Lock is off, the outlet has power, and the door switch tests fine with a multimeter, what’s usually left is the control board itself, and at that point a Samsung dishwasher won’t start again no matter how many times you cycle the door or the breaker. Boards aren’t cheap, and swapping one wrong can cost more than a service call would have. I’d rather see someone spend twenty minutes confirming a switch is bad with a meter than order a $150 board on a guess — PartSelect’s Samsung no-start repair page has model-specific part numbers if you get to that point. A qualified appliance tech can check the door latch, wiring, and board with the same tools described above, usually within one visit, and can confirm a board diagnosis before you pay for the part.

Related Dishwasher Problems Worth Checking

A Samsung dishwasher won’t start most often for something simple like a latch or a locked panel, but once it’s running again, other issues tend to surface. If dishes come out damp instead of dry, this drying troubleshooting guide covers heating element and vent checks. Water pooling under the door after a cycle usually points to a gasket or float switch issue, covered in this door-leak walkthrough. And if the top rack comes out dirty every time no matter what you do, this top-rack cleaning fix is worth a look too. Samsung also keeps a running list of no-start and no-fill scenarios on its official support page, which is a good cross-check if your model behaves a little differently than described here.

Frequently Asked Questions

Why does my Samsung dishwasher show power but won’t start a cycle?

That’s almost always Control Lock, an unlatched door, or Start not held long enough — work through those three before anything else. All three cost nothing and take a couple of minutes combined.

Can a tripped breaker cause a Samsung dishwasher not to start with no warning?

Yes. A tripped breaker or GFCI cuts power completely, so there’s no beep, no lights, and no warning on the display at all. Check the breaker panel and any GFCI outlet under the sink before assuming a part has failed.

Is a no-start problem on a Samsung dishwasher usually the control board?

Not usually. The control board is the least common cause on this list — the door latch switch and simple settings mistakes account for most calls, and boards should be one of the last things you test, not the first.

What should I do if the dishwasher won’t start after a power outage?

Check the breaker first, since outages sometimes trip it even after the power comes back on. Once power is confirmed, cancel any Delay Start setting that may have been active before the outage, then latch the door and hold Start for a full 3 seconds.

How do I know if the door latch switch is bad instead of the control board?

Test the switch with a multimeter set to continuity mode — press the plunger by hand and watch for continuity. If the switch fails that test, replace it before spending money on a board; the switch is a $15–$40 part compared to $80–$180 for a control board.

Work through the free checks first, test the door switch with a meter before buying one, and you’ll solve most of these without ever calling for service.