Error Code 7C

The water direction controller at the bottom isn't moving properly

Also displayed as: No display (7C in recall)

What This Means

Motor gear (vane motor) is out of order; Sensor vane is out of order; Vane is physically blocked by dishes or debris

First Thing to Check

Parts Involved

How to Fix

1. 1

   1. Check the connections for the motor vane and sensor vane connectors — reconnect

2. 2

   2. Check whether the coil in motor vane is conductive (remove connectors before measuring) — check resistance between Red and Black wire (CCW) and between White and Black wire (CW). Normal: approximately 1.625-1.796k ohms

3. 3

   3. Check position sensing with sensor vane (use n5 Service test mode) — check conduction between Brown and Black wire. Sensor ON: 0V, Sensor OFF: 5V

4. 4

   4. Adjust Motion Assembly and find the fault — replace if faulty

5. 5

   5. Check whether motor vane is operating normally — check operation voltage: Normal 110-120V. 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

   6. Check the Power Relay

Parts Commonly Needed for This Error

OEM part numbers confirmed by retailers

This Error Applies To

Samsung DW80M9 Series Dishwashers (2018) (2018–present)