Washing Machine
4E
The 4E error code on a Samsung washing machine means the machine isn’t getting enough water — or any water at all — to start or complete its cycle. It’s one of the most common Samsung error codes and, reassuringly, it’s often something you can sort yourself without calling an engineer. In this guide, we’ll walk you through exactly what’s causing it, the safe DIY fixes to try first, and when it’s time to pick up the phone.
What does this error mean?
The 4E code (sometimes displayed as 4C on newer Samsung models — they mean the same thing) is a water supply error. Your Samsung washing machine has a flow sensor and a water inlet system that monitors how much water enters the drum within a set time window. If insufficient water is detected during the fill phase, the machine stops the cycle and throws up the 4E code to protect itself from running dry. In plain terms: your machine is telling you it tried to fill with water and couldn’t do it properly. This could be because no water is reaching the machine at all, not enough is getting through, or the machine is mistakenly thinking there’s a problem due to a fault in its sensors or inlet valve.
Est. repair cost
DIY inlet valve replacement: £15–£35 for the part. Professional repair (call-out + labour + parts): £80–£150 for an inlet valve or filter fault. Pressure sensor replacement by an engineer: £100–£160. Control board replacement: £150–£250.
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Reset the machine first: Turn the washing machine off at the power button, then switch it off at the wall socket. Wait 5 minutes, then turn it back on and try running a short cycle (like a Quick Wash at 30°C). A one-off glitch can sometimes trigger a 4E, and a reset clears it. If the error doesn’t return, you’re done.
Step 2 — Check the water tap is fully open: Pull the washing machine forward slightly and locate the cold water isolation tap on the pipe behind it. It should be turned fully anticlockwise (inline with the pipe). If it’s partially or fully closed, open it completely and test the machine again.
Step 3 — Inspect the inlet hose for kinks or damage: With the machine pulled away from the wall, trace the blue inlet hose from the tap connection to the back of the machine. Straighten out any kinks or tight bends. Make sure the hose isn’t being crushed by the machine sitting on it. No tools needed.
Step 4 — Clean the inlet hose filter meshes: Turn off the water tap fully. Have a towel and a small bowl ready as water will spill. Unscrew the inlet hose from the back of the machine by hand (it’s a standard hand-tight connection). Inside the machine’s inlet port you’ll see a small mesh filter — carefully pull it out with a pair of needle-nose pliers or tweezers. Rinse it under a tap to remove limescale and debris. You can soak it in white vinegar for 10 minutes if it’s heavily scaled. Refit the filter, reconnect the hose, turn the tap back on, and check for leaks before running a test cycle.
Step 5 — Check for frozen pipes (winter/cold room only): If your machine is in an unheated space and temperatures have dropped below freezing, the inlet hose or valve may be frozen. Do not pour boiling water on the hose or machine. Instead, warm the room gently with a portable heater and allow the pipes to thaw naturally before attempting to run the machine.
Step 6 — Test your home’s water pressure: Run a cold tap near the washing machine and check the flow is strong and consistent. If the flow is very weak or intermittent, contact your water supplier (e.g. Thames Water, Severn Trent, Yorkshire Water) as low mains pressure may be the root cause. This is not a machine fault.
Step 7 — Check there are no other plumbing issues in the home: If other taps or appliances have reduced pressure at the same time, the issue is with your home’s water supply, not the washing machine. Contact a plumber or your water provider.
Step 8 — Inspect the detergent drawer and internal hoses for blockages: Remove the detergent drawer fully and clean it thoroughly under a tap. A heavily clogged drawer can sometimes restrict water flow into the drum. While the drawer is out, shine a torch into the housing and check for any obvious debris or detergent build-up blocking the internal water jets.
Step 9 — If the above steps haven’t resolved it, the inlet valve is likely faulty: The water inlet valve is located inside the back panel of the machine. Replacing it requires removing the back panel, disconnecting electrical connectors, and swapping out the valve unit. Replacement Samsung-compatible inlet valves cost approximately £15–£35 online. This is a manageable DIY repair for a confident homeowner comfortable working with appliances — but you must unplug the machine from the mains completely before opening any panels and ensure there is no residual water in the drum. If you are not confident doing this, call a professional.
Step 10 — Do not attempt to access or test the pressure sensor or control board yourself: The pressure switch and PCB (control board) involve electrical components and connections that should only be diagnosed and replaced by a qualified appliance engineer. If all the above steps have been completed and the 4E error persists, this is the point to call a professional.
📞 When to call a professional
Call a qualified appliance repair engineer if: the error persists after you’ve checked the tap, hose, and cleaned the filter; you’ve replaced the inlet valve and the problem continues; or you suspect the pressure sensor or control board is at fault. When you call, tell the engineer you have a Samsung washing machine showing a 4E (or 4C) error code, that you’ve already checked the water supply, hose, and inlet filter, and describe whether the machine fills with any water at all or none. This will save diagnostic time and may reduce your call-out cost. Look for an engineer registered with the Domestic Appliance Service Association (DASA) or one who specialises in Samsung appliances. Samsung also offers its own out-of-warranty repair service if your machine is less than 10 years old.
⚖️ Repair or replace?
If your Samsung washing machine is under 5 years old, repair is almost always the right call — Samsung parts are widely available in the UK and most 4E faults are inexpensive to fix. A new inlet valve costs £15–£35 as a DIY part, and even a professional repair including labour is unlikely to exceed £120–£150 for this fault. If your machine is between 5 and 8 years old, weigh the repair cost against its current value — if the engineer quotes more than £150, it’s worth getting a second opinion or considering a newer model. If your Samsung washing machine is over 8–10 years old and the fault turns out to be a control board failure (which can cost £150–£250 to repair professionally), replacement is likely the more economical long-term choice. Mid-range Samsung washing machines currently retail between £350 and £600 in the UK. Also factor in that older machines tend to develop secondary faults after the first repair.