Error Code 4C

The dishwasher isn't getting enough water to run

Also displayed as: 4C

What This Means

Water supply valve is closed or turned off; Water supply pressure is too low; Aqua stop device is malfunctioning; Case brake fails to detect the pulse (flow meter issue); Foreign material blocking water supply line or water valve filter; Water valve coil is not conductive; Main PBA is defective

First Thing to Check

Parts Involved

How to Fix

1. 1

   1. Check whether the faucet is open — open it if closed

2. 2

   2. Check whether the water supply has been cut off — wait for resumption then power cycle

3. 3

   3. Check for foreign material in the water supply line and water valve filter — clean filter with a brush

4. 4

   4. Check the connection for the water valve connector — reconnect if loose

5. 5

   5. Check whether the coil in the water valve is conductive (remove connector before measuring) — Normal: approximately 990 ohms plus or minus 10% (890-1089 ohms)

6. 6

   6. Check whether the water supply stops after water is supplied for 20 seconds — if faulty, replace the water valve and Assy guide water-sub

7. 7

   7. Check whether the water supply stops after 60 minutes — check water supply pressure (must be greater than 0.5 bar). If faulty, replace the water valve and Assy guide water-sub

8. 8

   8. Check whether the water valve is operating normally via Main PBA — check the water valve relay: voltage between the Blue wire (Number 6) of CN401 and the White wire of CN101. Normal: 110-120V while operating

9. 9

   9. Check the Power Relay — see Power Relay check procedure

Parts Commonly Needed for This Error

OEM part numbers confirmed by retailers

This Error Applies To

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