Samsung Dishwasher Error Code SYMPTOM‑WONT‑START — How to Fix (Dishwasher Won’t Start)

The Samsung dishwasher error code SYMPTOM-WONT-START is a frustrating problem that leaves your dishwasher completely unresponsive. When you press Start, the display remains dark, no water fills the machine, and there’s no hum of the pump or motor. This issue isn’t just about a malfunctioning button—it’s a system-wide failure tied to power delivery, the door-latch system, or a safety sensor that prevents the control board from activating the cycle. Below, I’ll break down the root causes, diagnostic steps, and fixes for this error in a way that even a first-time DIYer can follow.

What Samsung Dishwasher Error SYMPTOM-WONT-START Actually Means

This error occurs when the dishwasher’s control board detects a critical failure in the system that prevents it from starting a cycle. The most common triggers are:

• Power delivery issues: The dishwasher isn’t receiving consistent electricity from the outlet or circuit breaker.
• Door-latch problems: The door isn’t fully closed or the latch switch isn’t signaling the control board.
• Safety sensor faults: A flood sensor, water inlet valve, or internal circuitry is preventing the machine from operating.

Is it safe to keep using the dishwasher? No. If the dishwasher is completely unresponsive, it’s likely due to a power or safety issue that could escalate (e.g., electrical shorts or water leaks). Stop using it until the problem is diagnosed.

Quick Diagnostic Checklist (Use Before Calling Anyone)

Perform these 3 checks in under 2 minutes—they’ll rule out the simplest fixes:

1. Power-cycle the dishwasher: Unplug it for 1 minute or turn off the dedicated circuit breaker for 30 seconds. This resets the control board and clears temporary glitches.
2. Check the door latch: Open the door, then close it firmly until you hear a solid click. A misaligned door or broken latch switch is a top culprit.
3. Test the power outlet: Plug in another appliance (e.g., a phone charger) to confirm the outlet is working. Samsung dishwashers often require a dedicated 120V/20A circuit.

If these steps don’t resolve the issue, proceed to the root causes below.

Root Causes (Ranked by Likelihood)

### 1. Faulty Door Latch Assembly (45% of cases)

The door-latch system is the most common cause. When the door isn’t fully closed, the latch switch fails to signal the control board. Over time, the plastic components of the latch can wear out or the switch can lose continuity.

• How to verify: Use a multimeter to test the door latch switch for continuity when the door is closed. No continuity means the switch is defective.
• Fix difficulty: Medium (requires removing front panel and door components).
• Cost: $20–$50 for the switch; $100–$150 for professional repair.

### 2. Power Supply Issues (30% of cases)

A tripped circuit breaker, damaged power cord, or failed control board power module can cut off electricity to the dishwasher.

• How to verify: Use a multimeter to test voltage at the power inlet (120V AC). If there’s no power, check the circuit breaker and wiring.
• Fix difficulty: Medium to high (requires electrical knowledge).
• Cost: $50–$100 for a replacement power cord; $200–$300 for a control board.

### 3. Failed Water Inlet Valve (15% of cases)

The water inlet valve opens to let water into the dishwasher. If it’s damaged or not receiving voltage, the machine won’t start a cycle.

• How to verify: Turn off the water supply, remove the lower panel, and test the valve for 120V AC. No voltage = control board issue; voltage but no water = faulty valve.
• Fix difficulty: Medium.
• Cost: $30–$60 for the valve; $100–$150 for labor.

### 4. Flood Sensor Activation (5% of cases)

The flood sensor under the dishwasher base triggers a shutdown if it detects water. This can happen due to a leak or a faulty sensor.

• How to verify: Locate the silver disc near the bottom of the dishwasher. Dry it thoroughly and test. If it activates again, replace the sensor.
• Fix difficulty: Low.
• Cost: $15–$25 for the sensor; $50–$75 for DIY.

### 5. Control Board Failure (5% of cases)

Rare but expensive: A failed control board can prevent power from reaching critical components.

• How to verify: Check for visible damage (burn marks, swollen capacitors). Test the board’s power module with a multimeter.
• Fix difficulty: High.
• Cost: $150–$300 for the board; $150–$250 for labor.

Step-by-Step Fix for the Most Common Cause: Faulty Door Latch Switch

Time estimate: 30–45 minutes
Tools needed: Phillips screwdriver, multimeter, needle-nose pliers

Step 1: Disconnect Power

Unplug the dishwasher or turn off the circuit breaker to avoid electrical shock.

Step 2: Remove the Front Panel

Use a flat-head screwdriver to pry off the kickplate (the panel at the bottom of the dishwasher). Remove the screws securing the front panel and set it aside.

Step 3: Locate the Door Latch Switch

The switch is mounted near the door hinge or latch assembly. It’s a small black component with two wires connected to it.

Step 4: Test the Switch

Set your multimeter to continuity mode. Touch the probes to the switch terminals while closing the door. A working switch will show continuity (a beep or 0 ohms). No continuity = faulty switch.

Step 5: Replace the Switch

1. Disconnect the wires from the old switch.
2. Install the new switch (ensure it matches the old one’s part number, e.g., DA97-02268A for many Samsung models).
3. Reconnect the wires securely.

Step 6: Test the Dishwasher

Plug the dishwasher back in, close the door, and press Start. If the machine fills and runs, the fix is complete.

Model-Specific Differences

• Affected models: Samsung models from 2015–2020 (e.g., DW80R8150UC, DW60K8150US) are most prone to door-latch issues. Older models (pre-2015) often use a simpler mechanical latch with fewer electronic components.
• Firmware updates: Smart models (e.g., DW90K8150US) may require a SmartThings app update to resolve software glitches. Check for updates via the app.
• Recalls: No known recalls for SYMPTOM-WONT-START, but Samsung occasionally issues service alerts for control board defects in select models.

Repair Cost Breakdown

When to replace vs. repair: If the dishwasher is over 10 years old and repairs exceed $200, consider a new unit. Samsung’s Affinity Series (2020–2023) models are reliable and energy-efficient.

Warranty coverage: Samsung dishwashers typically have a 1-year parts/labor warranty. For extended coverage, call Samsung support at 1-800-726-7864.

Prevention & Maintenance

1. Clean the door seal monthly: Use a damp cloth to remove food particles and mold. A clogged seal can strain the latch.
2. Inspect the door hinge annually: Lubricate with silicone-based grease to prevent sticking.
3. Test the flood sensor quarterly: Dry it with a towel to prevent false triggers.
4. Run a cleaning cycle every 3 months: Use a dishwasher cleaner (e.g., Affresh) to dissolve mineral buildup.

When to Call a Professional

Seek help if:

• The dishwasher still won’t start after replacing the door latch and testing the power supply.
• You smell burning or see damaged wiring (never attempt DIY fixes for electrical fires).
• The control board shows error codes like HE (heating element failure) or 1E (motor error) after fixing the latch.

What to expect: A technician will perform a full diagnostic ($75–$150) and replace parts if needed. For complex issues like a failed control board, they’ll source OEM parts to avoid compatibility problems.

Find a pro: Use Samsung’s Authorized Service Provider search tool on their website or call 1-800-726-7864 for local options.

Frequently Asked Questions

Q: Why does my door latch switch keep failing?
A: Repeated over-tightening the door or using excessive force to close it can wear out the switch. Always close the door gently.

Q: Can I test the water inlet valve without a multimeter?
A: Yes. Turn off the water supply, remove the lower panel, and use a screwdriver to short the valve terminals. If it doesn’t click, the valve is bad.

Q: What’s the difference between SYMPTOM-WONT-START and error code HE?
A: HE indicates a heating element failure (the dishwasher heats water but overheats). SYMPTOM-WONT-START is a power/detection issue.

Q: My dishwasher starts but stops mid-cycle. Is this the same problem?
A: No. That’s often a pump or temperature sensor issue. Check our guide on GE Dishwasher Error C1 for similar symptoms.

Q: Can a tripped pressure switch cause this error?
A: Unlikely. The pressure switch affects draining, not starting. If water isn’t draining, see LG Dishwasher Error Symptom-Not-Draining.

By following this guide, you’ll save time, money, and frustration. Remember: Always disconnect power before working on electrical components, and never force the door if it’s stuck—this can damage the latch assembly further. For Samsung-specific support, use the contact number above, and refer to our Bosch Dishwasher Error E14 guide for cross-brand troubleshooting tips.

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