Samsung Dishwasher Won't Turn On

Quick Answer

A completely dead Samsung dishwasher is almost always a power supply issue: tripped breaker, failed outlet, or a blown thermal fuse inside the machine. Control lock (CL) can mimic a dead machine since all buttons are disabled.

Most homeowners I talk to assume it's the control board when their Samsung goes completely dark, but honestly it's usually something way simpler. The GFCI outlet under the sink trips all the time, and Samsung's Child Lock is notorious for getting activated mid-wipe-down. Ignore this long enough and you'll start ordering expensive parts you don't actually need. If the display's totally black, don't order a board yet.

SamsungDishwasherSeverity: moderate82% DIY Success

Time to Fix

5–45 min

Difficulty

beginner

Parts Cost

$8 – $35

Tools Needed

Phillips #2 screwdriver, Multimeter with continuity setting

Samsung Dishwasher Won't Turn On

OK so diagnosing a dead Samsung is basically a process of elimination, and you want to start at the breaker panel because these machines draw serious amperage during the heat cycle and a weak breaker will trip without fully flipping. If power's definitely reaching the unit, then we're looking at the door latch. Samsung's door sensors are picky. That latch doesn't click just right, the machine's brain stays asleep entirely as a flood-prevention measure.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Circuit breaker tripped40%

Control lock (CL) active - all buttons including Power are disabled24%

Door latch not fully engaging - machine thinks door is open14%

Control panel wiring harness loose or failed12%

Thermal fuse blown inside machine10%

Symptoms You May Notice

You press Power and literally nothing happens. No click, no hum, no lights, absolutely zero response.
Display is completely black even with the door fully latched and closed.
Every single button on the panel is dead, not just Power, not just Cancel, every one of them.
Machine ran a full cycle last night and this morning it's completely unresponsive like it was never plugged in.
You can confirm the outlet has power and the water supply is connected, but the dishwasher just sits there completely dark and silent.

Can you reset a Samsung dishwasher to clear the WONT-TURN-ON code?

Flip the dishwasher breaker off for a full 60 seconds. Seriously, count it out, don't cheat yourself on the time. This clears the control board memory completely. Flip it back on. If the panel lights up but won't respond to buttons, you're dealing with Child Lock. On most Samsung models, hold Sanitize and Delay Start together for 3 full seconds until you hear a beep and the lock icon disappears. Some older models use Hi-Temp Wash instead of Delay Start.

Tools Required for Diagnosis

Phillips #2 screwdriverMultimeter with continuity settingSmall flathead screwdriver (for prying panel clips)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Did the fix not work?

If the problem comes back after following these steps, a component has permanently failed and needs replacement. Check the specific error code your dishwasher is showing:

RESET Error →UNLOCK Error →WONT-START Error →

ComponentComponent Under Test

Expected Range0–5 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Thermal FuseDD47-00006A · $8–$15	DD47-00006A	$8 – $15
Door Latch AssemblyDD81-02028A · $20–$35	DD81-02028A	$20 – $35

Frequently Asked Questions

Why would a Samsung dishwasher suddenly stop turning on?

Sudden power loss is usually external to the machine. Check your GFCI outlet under the sink first, that thing trips silently all the time. If that's fine, it's often the thermal fuse. It's a small safety part inside the door that blows if the machine gets too hot. Once it goes, the dishwasher won't show any signs of life at all until you replace it. It's designed that way on purpose to keep the control board from melting. Part's cheap, under $15 usually.

How do I know if my Samsung dishwasher control lock is on?

Samsung's Child Lock is really easy to trigger by accident, especially if someone wiped down the panel or a kid leaned on the buttons. On many models the display stays dark and the Power button just does nothing at all. Look for a tiny padlock light, sometimes red or orange. You usually hold two specific buttons together for three full seconds to clear it, like Sanitize and Delay Start. If the display is 100% black with no icons whatsoever, the issue is electrical, not Child Lock.

Can a bad door latch prevent a Samsung dishwasher from turning on?

Absolutely it can. Samsung dishwashers won't even light up the display on some models if the latch microswitch doesn't send the closed-door signal to the control board. The machine's designed that way to prevent flooding. I always check the door strike for alignment and cracks before I even think about replacing a board, because a bent strike is a $20 fix and a new control board is $150+. Worth the extra five minutes to check.

How much does it cost to fix a Samsung dishwasher that won't turn on?

Depends completely on what's actually wrong. Tripped breaker or GFCI outlet? Free. Child Lock? Also free. Thermal fuse is $10-15 for the part and maybe an hour of your time. Door latch assembly runs $15-30. Now if it ends up being the main control board, that's where it gets painful. Boards for Samsung dishwashers run $80-200 depending on the model, and honestly at that point you should price out a new machine if yours is already 8+ years old.

My Samsung dishwasher has power to the display but won't start a cycle. Same issue?

Not really the same thing. If the display lights up and the panel is responding but you just can't get a cycle going, that's a totally different diagnostic path. Usually that's a specific error code, a door latch microswitch problem, or a water supply issue. The no-power scenario I'm covering here is when you get absolutely nothing from the machine. Zero lights, zero sounds, complete silence. That's the breaker, GFCI, thermal fuse, or Child Lock problem.

Related Samsung Dishwasher Error Codes

Code: RESETHow to Reset a Samsung Dishwasher Code: UNLOCKHow to Unlock a Samsung Dishwasher Code: WONT-STARTSamsung Dishwasher Won't Start

Same Fix Works on These Brands

Samsung shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Samsung washerSamsung Washer 3C2 Error Code: Motor Stall Samsung washerSamsung Washer 3E Error Code: Motor Fault Samsung washerSamsung Washer 4E Error Code: Water Supply Fault (Top Load)Samsung washerSamsung Washer 5C Error Code: Drain Error (Older Display)Samsung washerSamsung Washer 8C Error Code: Vibration Sensor Fault Samsung washerSamsung Washer 8E Error Code: Motor Frequency Sensor Fault

Models Known to Experience WONT-TURN-ON Errors

This repair applies to most Samsung dishwashers with this error code. Common model numbers include:

DW80R9950US, DW80R2031US, DW80T5040US, DW80K5050US, DW80N6070US, DW80M9550US

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026