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Samsung Dishwasher Error Code 7E

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026
⚠ Medium Severity 🔧 Easy DIY

Water wall reflector error — water wall sensor blocked

The most common cause of the 7E error on a Samsung dishwasher is large item blocking water wall reflector strip (~55% of cases); start with: check for obstructions.

💰 DIY cost: $0–$160 👨‍🔧 Pro cost: $150–$350 Save $150+ by doing it yourself
Samsung Dishwasher error code 7E on the display panel
How the 7E code appears on a Samsung dishwasher display

What Does Error Code 7E Mean on a Samsung Dishwasher?

Water wall reflector error — water wall sensor blocked.

On Water Wall models, a moving bar sweeps across the tub floor, and an optical sensor tracks its position using a reflective strip. The 7E code fires when the control board cannot confirm the bar's travel — either because the reflector beam is blocked or dirty, or the sensor or drive motor has failed. Unlike spray-arm faults, this is specific to the Water Wall positioning system, so a dish overhanging the bottom rack is enough to trip it.

Models affected: Samsung Water Wall dishwashers, primarily DW80K and DW80H series equipped with the moving water wall bar rather than a spray arm
What owners report: Owners commonly report this code appearing when a tall pot, cutting board, or item hanging off the bottom rack blocks the bar's path, and the quick win is usually just clearing the obstruction and wiping the silver strip clean. It sometimes false-triggers from a discolored or soap-filmed reflector, so cleaning before replacing parts is often worth trying.

What Causes Error Code 7E?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Large item blocking water wall reflector strip 55% of cases
  2. 2
    Reflector strip dirty or discolored 30% of cases
  3. 3
    Water wall motor or sensor failure 15% of cases

How to Fix Samsung Dishwasher Error Code 7E

🔧 Easy DIY Est. time: 10–20 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Check for obstructions

    Ensure no large pots or pans are blocking the bottom rack reflector strip.

  2. 2

    Clean the reflector strip

    Wipe the silver reflector strip on the bottom rack with a damp cloth.

  3. 3

    Check water wall motor

    The water wall should move back and forth during the wash. If stationary, the motor has failed.

    🔩 Samsung Water Wall motor assembly ($80–$160)

How to Reset Error Code 7E

Clear obstructions and restart. If 7E persists, the water wall motor may need replacement.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Samsung dishwasher reset guide → Enter diagnostic mode →

Did this guide fix your appliance?

When to Call a Professional

Water Wall motor replacement requires Samsung-authorized parts and careful disassembly.

Average professional repair cost for this issue: $150–$350

Find Replacement Parts

Use these links to find the exact replacement parts for your Samsung Dishwasher:

🔩
Search PartSelect
Samsung Dishwasher repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Samsung Dishwasher Error Codes

LC Leak sensor activated — water detected at base of dishwasher 5C Drain failure — water not draining from dishwasher 3C Wash motor error — circulation pump failure HE Heater error — water not heating tE Temperature sensor failure — NTC thermistor fault 1E Water inlet sensor failure

Frequently Asked Questions

Can I keep using my Samsung Dishwasher when error 7E appears? +
You often can for a cycle or two, but the sensor issue behind 7E will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.
What most commonly causes 7E on a Samsung Dishwasher? +
Across reported Samsung dishwasher repairs, the most frequent is large item blocking water wall reflector strip (55% of cases), reflector strip dirty or discolored (30%), then water wall motor or sensor failure (15%). Check them in that order before replacing any parts.
7E keeps coming back after a reset — what should I check next? +
A reset only clears the stored 7E fault; if it returns, the sensor problem is still present. Move on to the physical checks — check for obstructions, then clean the reflector strip — since the code will reappear until the root cause is resolved. This is a beginner-friendly job needing only basic hand tools.
How much does it cost to fix Samsung Dishwasher error 7E? +
A DIY repair typically runs $0–$160 in parts, versus $150–$350 for a professional service call, so handling it yourself saves around $150. Expect the work to take about 10–20 minutes.
Which Samsung Dishwasher models show error 7E? +
7E is documented on Samsung Water Wall dishwashers, primarily DW80K and DW80H series equipped with the moving water wall bar rather than a spray arm. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 10, 2026.

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