If you’re seeing a 4C error code on your Samsung dishwasher, you’re not alone. In this blog post, we’ll talk about the Samsung dishwasher 4C error code, what it means, what causes it, and how to fix it. We’ll also give you some tips on how to troubleshoot your Samsung dishwasher so that you can avoid this error code in the future.

Samsung Dishwasher 4C Error Code Explained
Samsung Dishwasher 4C Error Code Explained!

The 4C fault code is designed to let you know when your dishwasher is acting up, and we will show you how to effectively address it. Now let’s take a look at how to fix the Samsung dishwasher 4C error code.

The Samsung Dishwasher 4C Error Code: Meaning, Causes, and Solutions

The 4C or 4E error code on a Samsung dishwasher typically appears when there’s an issue with the water supply to the dishwasher. In this context, “4C or 4E” stands for “Water Supply Error.” This error is triggered when the dishwasher fails to reach the required water level within 60 seconds after water is initially supplied or when the flowmeter detects fewer than 10 water supply pulses within 20 seconds after water is supplied during either the wash or rinse cycle.

In simpler terms, the Samsung dishwasher 4C error code means that the dishwasher is having difficulty getting an adequate amount of water to perform its cleaning and rinsing functions, signaling a problem with the water supply system.

What’s Causing the 4C on Your Samsung Dishwasher?

The Samsung dishwasher 4C error code on your dishwasher can be attributed to various factors, and understanding them is crucial for effective troubleshooting.

  1. Closed Water Tap or Low Water Supply Pressure: If the water tap is closed or the water supply pressure is lower than the recommended specifications, your dishwasher may not receive an adequate water supply, leading to the 4C or 4E error.
  2. Partially Opened Water Faucet: When the water faucet isn’t fully opened, it restricts the flow of water into the dishwasher, leading to the 4C code.
  3. Kinked Water Hose During Installation: A kinked water hose impedes the water’s path to the dishwasher, much like a garden hose that’s twisted and constricted. It prevents the necessary water flow, leading to the 4C and 4E errors.
  4. Frozen or Ice-Covered Water Supply Valve: In cold weather, the water supply valve can freeze or become encased in ice; this impediment affects the flow of water to your dishwasher.
  5. Blocked Filter at the Water Valve: A clogged filter at the water valve can obstruct water flow. A clogged filter can limit water flow, leading to the 4C code or 4E error. In this case, the filter needs cleaning or replacement.
  6. Faulty Wiring Harness: A faulty wiring harness between the main board and critical components like the water inlet valve, flowmeter, or pressure sensor can disrupt communication.
  7. Faulty Water Inlet Valve: The water inlet valve controls the flow of water into the dishwasher. If it’s malfunctioning or doesn’t open as it should, the dishwasher won’t receive the necessary water supply.
  8. Faulty Flowmeter: The flowmeter is responsible for measuring water flow. If it’s not functioning properly, it can’t provide accurate information to the dishwasher. A malfunctioning flowmeter can’t accurately gauge water intake, leading to a 4C error.
  9. Faulty Main Board: The main board serves as the dishwasher’s brain, coordinating all functions. If it’s malfunctioning, it can’t effectively manage the water supply and other operations, leading to the 4C fault code.

Fixing the Samsung Dishwasher 4C Error code: Comprehensive Troubleshooting and Solutions

If you encounter the 4C fault code on your dishwasher, follow these troubleshooting steps to resolve the issue:

  1. Check the water pressure and valve
  • Ensure that the water supply pressure is not too low and that the water supply valve leading to your dishwasher is fully open.
  • Verify that the water pressure meets the recommended specifications, which should be within the range of 40–90 psi.
  1. Kinked water hose
  • Inspect the water supply hose to ensure it is not kinked or bent. If you find any kinks, carefully unkink the water inlet hose.
  1. Flood-Safe Water Supply Line
  • If you have a flood-safe water supply line installed, be aware that it can sometimes shut off the water supply even in the absence of a leak. Consider replacing it with a standard water supply line.
  1. Check for foreign material
  • Examine the water supply line and the water valve filter for any foreign material or debris. If found, clean or remove it to ensure a clear water path.
  1. Water Valve Connection
  • Check that the connector to the water valve is securely inserted. Re-connect it if necessary.
  1. Water Inlet Valve Resistance Measurement
  • Remove the connector from the water valve and measure its resistance. The normal range should fall between 0.89 and 1.09 KΩ.
Samsung Dishwasher Inlet Valve
Samsung Dishwasher Inlet Valve Resistance Measurements
  1. Flow Meter Main Voltage Measurement
  • Measure the DC main voltage supplied to the flow meter between the red and black wires. The normal range should be between ~ 4.98 and 5 Vdc. If the flow meter is not receiving +5 volts, consider replacing the main board.
  1. Flow Meter Feedback Voltage Measurement
  • When the inlet valve is energized or when water flows through the flowmeter turbine between the white and black wires, measure the DC feedback voltage supplied from the flow meter to the main board. The normal range is ~ 2.5 Vdc. If the flowmeter is not sending +2.5 Vdc to the main board, replace the flow meter assembly.
Samsung Dishwasher flow meter
Samsung Dishwasher Flow Meter Feedback Signal Measurement
  1. Pressure Sensor Checking
  • Check the pressure sensor for any issues, and replace it if necessary.
  1. Main Board Replacement
    • If all the above troubleshooting steps fail to resolve the Samsung dishwasher 4C error code and the issue persists, it may be necessary to replace the main board of the dishwasher.


Tackling the 4C error on your Samsung dishwasher may seem daunting, but with the right troubleshooting steps and solutions, you can swiftly overcome this common issue. By addressing factors such as water supply, hose integrity, and component functionality, you’ll have your dishwasher back to its efficient self in no time.

3 Commonly Asked Questions About Resolving the Samsung Dishwasher 4C Error code

The Samsung dishwasher 4C error code stands for “Water Supply Error.” It appears when the dishwasher fails to receive an adequate amount of water within a specific time frame during the wash or rinse cycle.

The Samsung dishwasher 4C error code can be triggered by various issues, such as low water pressure, closed water valves, kinked hoses, or faulty components like the water inlet valve or flowmeter. To fix it, you should follow a series of troubleshooting steps, including checking water pressure, valve status, hose condition, and inspecting and possibly replacing specific dishwasher components.

If you find foreign material or debris in the water supply line or the water valve filter, make sure to clean or remove it. This ensures that the water can flow freely without any obstructions.

  1. Want to learn a lot about the Samsung dishwasher error code list? Find out more here!
  2. Find out more about Samsung product error codes. Learn more today.

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