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E321Samsung Dishwasher

Samsung Dishwasher Error E321 – Meaning, Causes & How to Fix

The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.

Medium Severity
Low
Medium
High
Critical

Expert Verified

Reviewed by a Certified Electrical Engineer & Licensed Technician

Official Meaning

The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.

Real-World Causes

  • 1Electronic control board failure
  • 2Faulty valve solenoid
  • 3Low water pressure in plumbing system
  • 4Sensor damaged by moisture or mineral buildup
  • 5Blocked drain pump or hose

Symptoms

Look for these signs to confirm error E321 on your Samsung Dishwasher:

  • Machine pauses and displays error
  • Appliance stops mid-cycle
  • Clicking sounds as relays activate
  • Error appears at start of cycle

DIY Fix (Safe)

  1. 1Verify household water and power supply
  2. 2Inspect hoses and filters for blockages
  3. 3Restart appliance after disconnecting power for 5 minutes
  4. 4Clean accessible filters and sensors
  5. 5Run diagnostic mode if available

Professional Action Required

  1. 1Test valves, sensors, and motors with multimeter
  2. 2Inspect wiring harness and connectors
  3. 3Replace defective pumps, motors, or sensors
  4. 4Check control board relays
  5. 5Replace electronic control board if failure confirmed

Additional Context

Load Type
Any load type
Drain Related
Depends on cycle stage
Sensor Issues
Incorrect readings possible if sensors are blocked

Frequently Asked Questions

What does Samsung Dishwasher error E321 mean?
The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor.
What causes Samsung Dishwasher E321 error?
Common causes include: Electronic control board failure, Faulty valve solenoid, Low water pressure in plumbing system.
How do you fix Samsung Dishwasher error E321?
Start with these DIY steps: Verify household water and power supply. Inspect hoses and filters for blockages. If the error persists, professional service may be needed.

Related Error Codes

Other Samsung Dishwasher Errors

4CWater supply error – the dishwasher is not receiving water or the fill rate is too slow
5CDrain error – the dishwasher is unable to pump water out within the expected time
LCLeak detected – the dishwasher's leak sensor in the base pan has detected the presence of water, indicating a potential leak in the system
OCOver-level water error – the dishwasher has detected that the water level inside the tub is higher than expected, indicating a fill valve that won't shut off or drain that is too slow
E257The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor
E719The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor
E103The appliance control system detected a condition indicating fan motor failure – cooling or ventilation fan not operating
E367The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor

About the Author

Technical Review Team

Reviewed by certified appliance technicians with 10+ years of Samsung repair experience. Every error code is verified against manufacturer service manuals and real-world repair data.