Samsung Error Code 4C: What It Means and How to Fix
Error code 4C on a Samsung washer means the machine isn’t getting enough water, the water is too hot or too cold, or the water level sensor isn’t detecting the right amount. The most common cause is a clogged inlet filter or a kinked fill hose. Start with the quick checks below—most 4C errors clear after a simple cleaning.
First Checks to Run Before You Start Fiddling
Before you pull the washer out or open any panels, run through these five items. Each takes under two minutes and rules out the simplest problems.
| Check | What to do | Pass/Fail |
|---|---|---|
| Water supply valves | Both hot and cold valves should be fully open (counterclockwise). | If closed, open them. |
| Fill hoses | Look for kinks, pinches, or sharp bends. | Straighten any hose. |
| Inlet filter screens | Unscrew the hoses from the washer and inspect the small mesh screens inside the valve ports. | Remove any debris or mineral buildup. |
| Water pressure | Other faucets in the house should run at normal pressure. | Low pressure may need a plumber. |
| Water temperature | If the washer is set to cold but the incoming water is very hot, the sensor may trip 4C. | Run the tap to confirm temp. |
If all five checks pass, move to the step-by-step fix.
Step-by-Step Fix for Samsung Error Code 4C
1. Clean the Inlet Filters
The inlet filters (screens) sit inside the washer where the hoses connect. You’ll need pliers, a small brush (old toothbrush works), and a bucket.
- Turn off both water valves.
- Unscrew the hot and cold hoses from the back of the washer.
- Use needle-nose pliers to gently pull out each filter screen. They’re usually white or blue plastic.
- Rinse under running water, scrub with the brush, and reinsert.
- Reattach hoses and tighten by hand + a quarter turn with pliers.
- Turn valves back on and run a rinse cycle.
Common pitfall: Don’t force the filters if they’re stuck. Soak them in white vinegar for 15 minutes before scrubbing. For a deeper explanation of what the code means, see our guide on understanding the 4c error code on samsung washing machines.
Verification step after cleaning: Run a rinse‑only cycle with no clothes. The washer should fill normally and the error code should not reappear. If the code is gone and the cycle completes, the fix worked.
2. Check the Water Inlet Valve
If the filters are clean but the error persists, the next likely culprit is the water inlet valve. How you proceed depends on what you observe:
- If the washer fills very slowly or not at all → the inlet valve or its solenoid is likely faulty.
- If the washer fills to the correct level but still shows 4C → the pressure switch or its hose is the more probable cause. Skip to step 3.
To test the valve:
- Unplug the washer. Use a multimeter set to ohms (Ω) to check resistance across the valve coil terminals. A good reading is typically 200–500 Ω. If you see an open circuit (OL), the valve is bad.
- Visual check: Look for cracks or corrosion on the valve body.
Tools needed: Multimeter, screwdriver, possibly a new valve (part number varies by model—check your manual). Replacing the valve costs $30–$60 and requires basic DIY skills. For a complete list of fixes sorted by model, check the samsung error code 4c fix page.
3. Verify the Water Level Sensor (Pressure Switch)
The 4C code can also mean the pressure switch (or its hose) is misreading the water level.
- Locate the pressure switch on the top or side of the washer (small plastic disc with a rubber hose attached).
- Inspect the hose for cracks, clogs, or kinks. Remove it and blow through it—you should feel air flow freely.
- If the hose is clear, the switch itself may be faulty. Replace it if the error code returns after the hose check.
4. Reset the Control Board
Sometimes a transient glitch trips the error. A full reset clears the board’s memory.
- Unplug the washer (or flip the breaker) for 60 seconds.
- Plug it back in and run a quick wash cycle (no clothes, small load setting).
- If the error disappears and doesn’t return, the problem was a temporary fault.
When to Stop Troubleshooting and Call a Technician
Use this stop threshold to know when DIY no longer makes sense:
- If you’ve cleaned the filters, tested the inlet valve (proper resistance), and inspected the pressure switch hose, but the 4C code still appears, stop. The main control board or wiring harness likely needs professional diagnosis. Further tampering can damage the board or cause electrical shock.
- If you’re uncomfortable working with live electrical components or testing with a multimeter, stop and call a repair pro. A misdiagnosis can cost more in the long run.
Common Causes of Samsung Error Code 4C (Quick Reference)
| Cause | What to look for | Fix time | Cost to fix |
|---|---|---|---|
| Clogged inlet filter | Debris or mineral buildup on screen | 15 min | $0 |
| Kinked fill hose | Sharp bend or pinch in hose | 5 min | $0 |
| Failed water inlet valve | No continuity on solenoid, visible cracks | 30–60 min | $30–$60 |
| Water temperature sensor (thermistor) | Reading wrong resistance; check with multimeter | 20 min | $10–$20 |
| Control board glitch | Other checks pass, error returns after reset | 60 sec | $0 (reset) or $150+ (replace) |
FAQ: Samsung Error Code 4C
Q: Can I run the washer with the 4C error showing?
A: No—the washer will stop filling and may not complete the cycle. Running it repeatedly can damage the inlet valve or overheat the heater.
Q: Will a power surge cause error code 4C?
A: Yes. A surge can corrupt the control board’s sensor readings. A full reset (unplug 60 seconds) often clears it.
Q: Do I need to replace both hot and cold inlet valves even if only one side is faulty?
A: Most Samsung washers use a single dual-valve assembly. If one solenoid fails, replace the whole assembly to avoid a repeat failure on the other side.
If the 4C code returned after you cleaned the filters and checked the hoses, the next step is testing the inlet valve. The steps above cover the most common fixes, and professional diagnosis is the safest route if the problem persists.