How to Solve Samsung Dishwasher 4c Error Code

Solution of Samsung dishwasher 4c error code

Dishwashers are a godsend for many households, streamlining the task of cleaning up after meals.

Samsung, a renowned brand in home appliances, offers a range of efficient dishwashers.

But, like all appliances, they might occasionally present us with error codes that can be mystifying.

One such code that has left several Samsung dishwasher users scratching their heads is the “4C” error.

This code signals an issue related to water supply.

Before you consider calling a technician or thinking of replacing the appliance, there are several troubleshooting steps you can take.

This guide aims to demystify the “4C” error, explaining its root causes and providing a step-by-step approach to resolving it.

And remember, always prioritize safety; ensuring your dishwasher is unplugged before you start any fixes is paramount.

Check the Basics

Before diving into more complex troubleshooting steps, it’s essential to rule out fundamental issues that might be causing the “4C” error on your Samsung dishwasher.

This step involves ensuring that the basic operational aspects of the dishwasher are in order.

  • Door Latch: The dishwasher door must be securely closed and latched for the washing cycle to initiate. A loose or improperly latched door could prevent the dishwasher from starting, and might trigger error codes. Ensure that the door is firmly shut. If you hear an audible click, that’s usually a sign that it’s securely latched.
  • Power Supply: It might sound obvious, but sometimes, power interruptions or unplugged cords can be the cause behind the error. Ensure that the dishwasher is correctly plugged in. If it’s hardwired, verify that there are no interruptions in power. A brief power outage that you might not have noticed could have disrupted the cycle. It’s also a good idea to check your home’s circuit breaker or fuse box to ensure that power is being supplied to the dishwasher.

By starting with these basic checks, you’re ensuring that the error isn’t a result of simple oversights.

It also sets a foundation for the subsequent troubleshooting steps, ensuring that you’re not trying to fix more complex issues when the problem might be something straightforward.

Examine the Water Supply Valve

The water supply valve plays a crucial role in ensuring that your dishwasher receives an adequate amount of water to operate correctly.

If there’s an issue with the valve, it can prevent water from entering the machine, leading to the “4C” error. Here’s how to inspect and address any issues related to the water supply valve

  • Locate the Valve: Typically, the water supply valve can be found under the kitchen sink or directly behind the dishwasher. It’s a knob or a lever attached to a hose or pipe that supplies water to the dishwasher.
  • Check its Position: The valve should be in the fully open position for optimal water flow. If it’s in the closed or partially closed position, it can restrict water supply. The valve is open when the handle is aligned with the pipe (for most designs) and closed when it’s perpendicular. Turn the valve to its open position, ensuring it’s not too tight to avoid potential damage.
  • Inspect for Leaks: While you’re examining the valve, it’s a good idea to check for any signs of leaks or water damage. If there’s evidence of a leak, you might need to replace the valve or its washer.
  • Check for Blockages: Sediment or debris can sometimes accumulate in or around the valve, causing a blockage. While this is less common, it’s worth a quick inspection. If you suspect a blockage, you might need to shut off the main water supply to your home and then carefully clean out the valve.

Ensuring the water supply valve is functioning correctly is a fundamental step in troubleshooting the “4C” error.

A fully open and unobstructed valve ensures that your dishwasher receives the necessary water to operate efficiently.

Inspect the Water Supply Hose

The water supply hose serves as the conduit that channels water from your home’s plumbing system into your dishwasher.

Any issues with this hose can directly impact the water flow, potentially triggering the “4C” error. Here’s a step-by-step examination of the water supply hose:

  • Locate the Hose: Find where the water supply hose connects to both the water supply valve (usually under the sink) and the dishwasher. It’s typically a flexible tube, often made of braided steel or plastic.
  • Check for Kinks or Bends: A kinked hose can restrict water flow, similar to how a bent straw makes it difficult to drink. Carefully run your hands along the length of the hose to feel for any kinks or sharp bends. If you find one, gently straighten out the hose to ensure a free flow of water. Make sure the hose is positioned in a manner that prevents future kinks.
  • Inspect for Damage: Look over the hose for any signs of wear, tear, or damage. Cracks, punctures, or significant wear can reduce water pressure and potentially lead to leaks. If the hose looks worn out or damaged, consider replacing it.
  • Ensure a Secure Connection: The points where the hose connects to the water supply valve and the dishwasher should be tight and secure. Loose connections can lead to reduced water pressure and potential leaks. If a connection feels loose, gently tighten it, ensuring not to overtighten and damage the threads.
  • Check for Blockages: On rare occasions, debris or sediment might accumulate inside the hose, causing a blockage. If you’ve ruled out other issues and still suspect a blockage, you might need to disconnect the hose (after shutting off the water supply) and flush it out. Ensure the water runs freely through the hose before reconnecting it.

By ensuring that the water supply hose is in good condition and free of obstructions, you’re making sure that your dishwasher has an uninterrupted supply of water, reducing the chances of encountering the “4C” error.

Clean the Inlet Filter

The inlet filter, also known as the water inlet screen, is a crucial component designed to capture and prevent debris, sediment, and other impurities from entering your dishwasher.

Over time, this filter can become clogged, restricting the flow of water and potentially triggering the “4C” error. Here’s how to clean the inlet filter:

  • Locate the Inlet Filter: Typically, the inlet filter is situated where the water supply hose connects to the dishwasher, often at the back or underneath the unit. Depending on the specific model of your Samsung dishwasher, the location might vary, so consulting the user manual can be helpful.
  • Disconnect the Water Supply: Before working on the inlet filter, ensure you shut off the water supply valve to prevent any unexpected water flow. It’s also a safety measure to unplug the dishwasher.
  • Remove the Filter: Depending on the design, you might need to unscrew the hose connection or a retaining cap to access the filter. Once accessed, carefully remove the filter, being mindful of any small components or seals.
  • Inspect and Clean: Hold the filter up to a light source. If it’s clogged or dirty, you’ll notice a diminished transparency. Clean the filter by gently rinsing it under running tap water. For stubborn debris, use a soft brush (an old toothbrush works well) to scrub the mesh gently. Avoid using any harsh chemicals or abrasives, as they can damage the filter.
  • Reinstall the Filter: Once cleaned, place the filter back in its original position, ensuring it’s seated correctly. Reattach any components you removed earlier, such as the hose connection or retaining cap. Make sure everything is secure but avoid overtightening, which might damage the threads or seals.
  • Reconnect Water Supply and Test: Turn on the water supply valve and check for any leaks at the connection points. Plug in the dishwasher and run a short cycle to check if the “4C” error persists.

Regularly cleaning the inlet filter not only helps in preventing errors but also ensures that your dishwasher operates with clean water, promoting better washing performance and longevity of the appliance.

Examine the Float Assembly

The float assembly is an integral safety feature in most dishwashers. Its primary function is to detect the water level inside the dishwasher tub.

When the water reaches a certain level, the float rises and signals the dishwasher to stop filling.

If this component malfunctions or gets stuck, it can cause the dishwasher to think it’s already full, leading to water supply issues and potentially triggering the “4C” error.

Here’s how to inspect and address any issues related to the float assembly:

  • Locate the Float Assembly: Open the dishwasher door and look inside the bottom of the tub. The float assembly typically looks like a small plastic dome or cylinder. Depending on your Samsung model, its appearance may vary, so consulting the user manual can provide clarity.
  • Check for Free Movement: Gently push down on the float and then release it. It should move freely up and down. If it feels stuck, there might be debris or build-up underneath that’s causing the obstruction.
  • Clean Underneath the Float: Remove any noticeable debris from around the float base. Sometimes, bits of food, broken glass, or other residues can accumulate and hinder the float’s movement. Use a damp cloth or sponge to clean the area, ensuring you remove any obstruction.
  • Inspect the Float Switch: Beneath the float, there’s a switch that gets triggered when the float rises to a certain level. This switch can malfunction over time. If you’ve cleaned the float and ensured its free movement but still face the “4C” error, there could be an issue with the switch. Testing the switch might require a multimeter and some technical knowledge. If you’re not comfortable doing this, it might be time to consult a professional.
  • Re-test the Dishwasher: After examining and addressing any potential issues with the float assembly, run a short cycle to check if the “4C” error persists.

Regularly checking and cleaning the float assembly can help ensure the proper water level in your dishwasher, leading to efficient operation and preventing unwanted errors.

Check the Water Inlet Valve

The water inlet valve is a crucial component that regulates the flow of water into your dishwasher.

When signaled by the appliance’s control unit, this valve opens, allowing water to flow in.

A malfunctioning or clogged water inlet valve can restrict this flow, which can trigger the “4C” error.

Here’s how you can inspect and potentially address issues with the water inlet valve:

  • Locate the Water Inlet Valve: The water inlet valve is typically located at the bottom of the dishwasher behind the lower access panel. Before working on it, ensure the dishwasher is unplugged and the water supply is turned off for safety.
  • Inspect for Physical Damage: Visually check the valve for any signs of wear, damage, or leakage. If it appears damaged or if there are signs of water leaks around it, it might be time to replace the valve.
  • Check for Electrical Issues: With the dishwasher unplugged, you can use a multimeter to check the water inlet valve for continuity. If the valve does not have continuity, it means it’s defective and should be replaced. If you’re unfamiliar with using a multimeter or testing electronic components, it may be wise to consult a professional.
  • Inspect for Blockages: Over time, sediment or mineral deposits can build up inside the valve, impeding the flow of water. You can remove the water supply line connected to the valve and visually inspect it for any debris. If you spot any blockages, you might consider cleaning or replacing the valve.
  • Check the Valve’s Screen Filter: Some water inlet valves come equipped with a screen filter to trap debris. This can get clogged over time. Check if your model has this feature and, if so, clean the screen filter to ensure a smooth water flow.
  • Reconnect and Test: If you’ve made any adjustments or replacements, reconnect everything, turn on the water supply, plug in the dishwasher, and run a test cycle to see if the “4C” error has been resolved.

The water inlet valve is vital for the proper functioning of your dishwasher.

Keeping it in optimal condition ensures that your appliance receives the right amount of water it needs for each cycle.

Verify Water Pressure

The “4C” error on a Samsung dishwasher is largely related to water supply issues.

One often overlooked but essential factor is the water pressure in your home.

If the pressure is too low, the dishwasher might not be getting the amount of water it needs to function correctly, leading to the error code. Here’s how you can verify and address water pressure issues:

  • Water Pressure Gauge: The most direct way to measure water pressure is by using a water pressure gauge. This device can be screwed onto a garden faucet or any other water outlet. Once attached, turn on the faucet, and the gauge will provide a reading of your home’s water pressure. Typically, ideal water pressure for homes should be between 40-60 psi (pounds per square inch). If it’s significantly lower, you might have found the root cause of the problem.
  • Check Other Fixtures: Before concluding that water pressure is the main issue, test other water fixtures in your home, such as faucets, showers, and washing machines. If they too are experiencing low pressure, it’s likely a broader issue with your home’s water supply.
  • Inspect Main Water Valve: Sometimes, the main water valve, which is usually located near where the water main enters your home, might not be fully open. Check to make sure it’s in the fully open position to ensure maximum water flow.
  • Look for Leaks: A significant water leak in your home’s plumbing can reduce water pressure. Examine visible pipes for signs of leakage, and listen for any unusual sounds of running water when all fixtures are off, which might indicate a hidden leak.
  • Consult with Neighbors: If you’re living in a community or complex, it might be useful to check with neighbors to see if they’re experiencing similar issues. If they are, the problem might be with the municipal water supply or the broader plumbing infrastructure of the complex.
  • Seek Professional Help: If you’ve identified that water pressure is the issue but can’t pinpoint the exact cause or solution, it might be time to consult a professional plumber. They can provide insights into potential issues and offer solutions to restore optimal water pressure.

Ensuring that your home has the correct water pressure is not only crucial for the efficient operation of your dishwasher but also for the overall health of your home’s plumbing system.

Software or Electrical Glitches

Modern dishwashers, including many Samsung models, come equipped with sophisticated software and electronic controls to optimize their operation.

However, like any electronic device, they can occasionally experience software hiccups or electrical anomalies.

Such glitches can sometimes manifest as error codes like “4C,” even if there’s no mechanical issue with the water supply. Here’s how to diagnose and potentially resolve these glitches:

  • Power Cycle the Dishwasher: One of the simplest solutions to resolve electronic glitches is to power cycle the device. Unplug the dishwasher from the electrical outlet, wait for about a minute, and then plug it back in. This can reset the system and potentially clear any temporary glitches causing the error.
  • Check for Power Fluctuations: Sudden surges or drops in your home’s electrical supply can affect the dishwasher’s operation. If you recently experienced a power outage, storm, or any other event that might have caused a power disruption, it could be related to the error.
  • Examine the Control Panel: Sometimes, the issue could be with the control panel itself. Ensure that all buttons respond correctly and that the display is functioning as it should. If you notice any abnormalities, there might be a need for repairs or replacements.
  • Update Software (if applicable): Some advanced dishwasher models allow for software updates. Check the manufacturer’s website or user manual to see if this is an option for your model. If so, ensure your dishwasher is running the latest software version, as updates can sometimes resolve known glitches or bugs.
  • Inspect Wiring and Connections: Over time, wiring can degrade or connections can come loose, leading to erratic behavior. If you’re comfortable and familiar with electronics, you can inspect the internal wiring of the dishwasher. If not, this is best left to a professional technician.
  • Consult a Professional: If you suspect that the error is due to a software or electrical glitch but can’t resolve it through the steps above, consider reaching out to a professional appliance technician. They can perform a more thorough diagnosis and offer solutions.

Remember, while it might be tempting to delve deep into the electronic components of the dishwasher, always prioritize safety.

Ensure the dishwasher is unplugged from the power source before attempting any in-depth inspections.


Troubleshooting the “4C” error code on a Samsung dishwasher involves a systematic approach, examining various components of the dishwasher to ensure optimal water flow and function.

From verifying basic setups and examining water supply components like hoses and valves to addressing potential software or electrical glitches, there are several steps homeowners can take before considering professional intervention.

It’s always vital to prioritize safety during any troubleshooting process, making sure the appliance is unplugged and water sources turned off when needed.

Regular maintenance, such as cleaning filters and checking hoses, can also proactively prevent such errors, ensuring your dishwasher continues to operate smoothly.

However, if after all these steps the “4C” error persists, it might be time to consult with a professional appliance technician.

They’ll provide expert guidance and solutions, ensuring your dishwasher is back up and running efficiently.


  1. Samsung’s Official Website: Start with the official Samsung website. They often have comprehensive user manuals, FAQs, and troubleshooting guides for their appliances.
  • Direct Link: You’d typically find manuals and support resources at
  • Search for your specific dishwasher model, and you should find resources related to it.
  1. Online Forums: There are many forums where users discuss issues they encounter with their appliances. Some popular ones include:
  • RepairClinic: Offers problem diagnoses and solutions for various appliances.
  • ApplianceBlog: A forum where people share issues and solutions about household appliances.
  • DIY Appliance Repair Help: A platform dedicated to DIY solutions for appliances. Simply enter “Samsung dishwasher 4C error” into the search bar of these forums to find relevant discussions.
  1. YouTube: Many appliance technicians and enthusiasts share step-by-step video guides on diagnosing and fixing common errors. Just search for “Samsung dishwasher 4C error fix” or similar queries.
  2. Appliance Repair Shops: Local appliance repair shops or technicians might have online resources, blogs, or guides about common issues they encounter. While these might not be as extensive as official resources, they can offer practical, hands-on insights.
  3. Appliance Parts Websites: Websites that sell appliance parts often have diagrams, manuals, and sometimes even forums or Q&A sections. Examples include:
  • PartSelect
  • Sears PartsDirect
  1. Library or Bookstores: While more traditional, you can sometimes find appliance repair manuals or books that delve deep into troubleshooting various household appliances.
  2. Google Search: When in doubt, a simple Google search with your specific problem, model, or concern can lead to a multitude of resources, including blog posts, articles, and guides written by professionals and everyday users.

Frequently Asked Questions (FAQs)

What does the “4C” error code mean on my Samsung dishwasher?

The “4C” error code indicates a problem related to water supply. It means that the dishwasher isn’t receiving water or the amount it’s receiving is insufficient.

Can I continue to use my dishwasher if it displays the “4C” error?

No, it’s advisable not to use the dishwasher until the issue causing the “4C” error is resolved. Using it could potentially worsen the problem or lead to other issues.

I’ve checked the water supply and everything seems fine. Why am I still getting the “4C” error?

The “4C” error can arise from various factors, including blockages in the inlet hose, a malfunctioning water inlet valve, software glitches, or even issues with water pressure. It’s essential to go through a comprehensive troubleshooting process to pinpoint the exact cause.

How often should I clean the inlet filter to prevent such errors?

Regular maintenance is crucial. It’s advisable to inspect and clean the inlet filter every 3-6 months, depending on your water quality and how frequently you use your dishwasher.

Is it safe to troubleshoot the dishwasher by myself?

While many of the troubleshooting steps are safe for homeowners to perform, always ensure you unplug the dishwasher and turn off the water supply before any inspection. If you’re unsure or uncomfortable with any step, it’s best to consult a professional technician.

Are software or electrical glitches common in Samsung dishwashers?

Modern dishwashers, including Samsung models, are sophisticated appliances with electronic controls. While they are generally reliable, like any electronic device, they can occasionally experience software or electrical anomalies. Regular updates and maintenance can help mitigate such issues.

My Samsung dishwasher displayed the “4C” error once, but it disappeared after a restart. Should I be concerned?

While a one-time glitch might not be a cause for immediate concern, it’s always a good idea to monitor the appliance. If the error recurs, it indicates an underlying issue that needs attention.

I am Kevin Technician and this website is created with the purpose to help common people to find proper information about Dishwasher. Feel free to comment or email your queries.