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ErrBase

Samsung Dishwasher 3C Error Code: Motor Communication Fault

Quick Answer

Samsung 3C error code means the main control board cannot communicate with the motor control board DD92-00134A. Before replacing any boards, check the wiring harness between the two boards - a loose or corroded connector is a common and cheap cause. 3C is distinct from LE, which means the motor physically locked.

Samsung 3C error code means the main control board cannot communicate with the motor control board DD92-00134A. Before replacing any boards, check the wiring harness between the two boards - a loose or corroded connector is a common and cheap cause. 3C is distinct from LE, which means the motor physically locked. 3C is a communication fault.

SamsungDishwasherSeverity: highDifficulty: advanced65% DIY Success
Time to Fix
60–120 min
Difficulty
advanced
Parts Cost
$80 – $150
Tools Needed
Phillips screwdriver, Torx T20 screwdriver

What Does the 3C Code Mean?

3C is an advanced fault requiring component-level diagnosis. The motor control board interprets commands from the main board and drives the wash motor. If the communication path between them is broken by a bad connector, damaged wire, or failed board, 3C appears.

Most Likely Causes

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

Wiring harness connector between boards loose or corroded40%
Motor control board DD92-00134A failed24%
Damaged wire in harness from chafing or heat22%
Main control board failed (less common)14%

Symptoms You May Notice

  • 3C code at start of cycle - machine will not run
  • Machine powers on and accepts input but cycle does not progress past start
  • No motor sound at all when cycle begins
  • 3C immediately after LE code history

Can you reset a Samsung dishwasher to clear the 3C code?

Hold Start/Cancel for 3 seconds to clear 3C. The code will return at the next cycle start if the communication fault is not resolved.

Tools Required for Diagnosis

Phillips screwdriverTorx T20 screwdriverMultimeterContact cleaner

Diagnostic Checklist

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

1

Remove the lower kick panel and side access panel to locate the

Remove the lower kick panel and side access panel to locate the motor control board. Inspect all wiring connectors on the board for loose fit, bent pins, or corrosion.

2

Visually inspect the motor control board DD92-00134A for burn

3

Replace the motor control board DD92-00134A

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
Motor Control BoardDD92-00134A · $80–$150

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $115 (Parts) vs $725 (New Machine)

Frequently Asked Questions

What is the difference between 3C and LE on Samsung dishwashers?
LE means the motor is physically locked or stalled - a mechanical problem. 3C means the control board cannot communicate with the motor controller - an electrical or board-level problem. LE can cause 3C if the locked motor damages the controller over time.
Is a 3C error worth repairing on an older Samsung dishwasher?
The motor control board costs $80-150 plus labor. If the machine is under 8 years old and otherwise in good condition, the repair is worth attempting. On machines over 10 years old, a new dishwasher at $500+ may be more cost-effective.

Related Samsung Dishwasher Error Codes

Code: LESamsung Dishwasher LE Error Code: Motor Locked

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 StallSamsung washerSamsung Washer 3E Error Code: Motor FaultSamsung washerSamsung Washer 4C Error Code: No Water SupplySamsung 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

Models Known to Experience 3C Errors

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

DW80R9950US, DW80R2031US, DW80T5040US, DW80K5050US, DW80N6070US, DW80M9550US

Last verified for technical accuracy on March 14, 2026