Error Code 7C
The spray nozzle distributor motor is not moving correctly
Moderate
Address soon - your appliance may not work properly
Also displayed as: 7C (no display during normal operation)
What This Means
Motor gear (vane motor) defective; Sensor vane defective; Vane mechanism blocked by foreign object
What actually causes this:
The motor gear or position sensor for the spray distribution system has failed or gotten jammed
First Thing to Check
Listen for unusual grinding or clicking noises during a wash cycle
Parts Involved
How to Fix
- 1
1. Check connections for motor vane and sensor vane connectors — reconnect
- 2
2. Measure vane motor coil resistance: Red to Black (CCW) and White to Black (CW) — disconnect before measuring — normal: approximately 1.625 to 1.796k ohms
- 3
3. Check sensor vane position sensing (use n5 Service test mode) — Brown to Black wire: Sensor on = 0V, Sensor off = 5V
- 4
4. Adjust Motion Assembly and identify fault — replace if faulty
- 5
5. Check vane motor relay operation: CCW voltage between CN401 pin 8 (Red) and CN101 White, CW voltage between CN401 pin 7 (White) and CN101 White — normal: 110-120V while operating
- 6
6. Check the Power Relay
This Error Applies To
Samsung DDW24M999U Series Dishwashers (2017) (2017–present)
Related Error Codes
The heating element is not warming the water properly
The dishwasher cannot pump the dirty water out
The water inside the dishwasher got dangerously hot
Water is leaking inside the base of the dishwasher
The touch panel and the control board are not communicating properly
The dishwasher's main computer board and display board cannot talk to each other
The motor controller board is not responding to the main computer
The water distribution vane that directs spray is not moving to the correct position