How do I fix error code 4C on a Samsung dishwashers?

1. undefined: 1. Check whether the water faucet is open 2. undefined: 2. Check whether the water supply has been cut off 3. undefined: 3. Check for foreign material in the water supply line and water valve filter — clean filter with a brush 4. undefined: 4. Check the connection for the water valve connector — reconnect if loose 5. undefined: 5. Measure water valve coil resistance (disconnect connector first) — normal: approx. 990 ohms +/-10% (890-1089 ohms) 6. undefined: 6. Check whether the water supply stops after water is supplied for 20 seconds — if faulty, replace water valve and Assy guide water-sub 7. undefined: 7. Check whether the water supply stops after 60 minutes — check water supply pressure (greater than 0.5 bar); if faulty, replace water valve and Assy guide water-sub 8. undefined: 8. Check water valve relay on Main PBA — measure voltage between Blue wire (Number 6) of CN401 and Red wire of CN101 connector — normal: 110-120V while operating 9. undefined: 9. Check the Power Relay — see Power Relay check procedure

Samsung Dishwashers2023–present

Error Code 4C

Q: What does error code 4C mean on a Samsung dishwashers?

The dishwasher isn't getting enough water Water supply valve is closed or partially closed; Water supply pressure is too low; Aqua stop device is malfunctioning; Case brake fails to detect flow meter pulses; Foreign material blocking water supply line or water valve filter; Water valve coil is defective (open circuit); Main PBA water valve relay is defective

The dishwasher isn't getting enough water

Moderate

Address soon - your appliance may not work properly

Also displayed as: 4C

What This Means

Water supply valve is closed or partially closed; Water supply pressure is too low; Aqua stop device is malfunctioning; Case brake fails to detect flow meter pulses; Foreign material blocking water supply line or water valve filter; Water valve coil is defective (open circuit); Main PBA water valve relay is defective

What actually causes this:

The water supply valve under the sink is turned off, or a filter screen is clogged with debris

First Thing to Check

Make sure the water supply valve under your kitchen sink is fully open

Parts Involved

Water ValveAssy Guide Water-SubMain PBACase Brake

How to Fix

1
1. Check whether the water faucet is open
2
2. Check whether the water supply has been cut off
3
3. Check for foreign material in the water supply line and water valve filter — clean filter with a brush
4
4. Check the connection for the water valve connector — reconnect if loose
5
5. Measure water valve coil resistance (disconnect connector first) — normal: approx. 990 ohms +/-10% (890-1089 ohms)
6
6. Check whether the water supply stops after water is supplied for 20 seconds — if faulty, replace water valve and Assy guide water-sub
7
7. Check whether the water supply stops after 60 minutes — check water supply pressure (greater than 0.5 bar); if faulty, replace water valve and Assy guide water-sub
8
8. Check water valve relay on Main PBA — measure voltage between Blue wire (Number 6) of CN401 and Red wire of CN101 connector — normal: 110-120V while operating
9
9. Check the Power Relay — see Power Relay check procedure