Samsung 4C
Water Supply Issue
Low severityExpert Guide
SeverityLow
What Your Machine Is Actually Telling You
4C means the washer did not detect enough water entering during the fill stage. Samsung's flow meter measured insufficient flow (or no flow) within the allotted time.
Samsung uses a dual-valve system: One solenoid controls hot water, another controls cold. The 4C code can trigger if either valve is blocked, if the water supply is off, or if the flow rate is below the minimum threshold.
4C vs 4C2 (on some models):
- 4C = general water supply issue.
- 4C2 = hot/cold hoses are swapped (reversed connections).
Common causes:
1. Water taps closed (30%) — someone turned them off.
2. Inlet filter screens clogged (25%) — mineral deposits blocking mesh.
3. Kinked inlet hoses (15%) — hose bent behind machine.
4. Low water pressure (10%) — whole-house pressure issue.
5. Frozen pipes (5%) — in winter/cold installations.
6. Faulty inlet valve (10%) — solenoid not opening electrically.
7. Water supply outage (5%) — municipal or building issue.
Samsung uses a dual-valve system: One solenoid controls hot water, another controls cold. The 4C code can trigger if either valve is blocked, if the water supply is off, or if the flow rate is below the minimum threshold.
4C vs 4C2 (on some models):
- 4C = general water supply issue.
- 4C2 = hot/cold hoses are swapped (reversed connections).
Common causes:
1. Water taps closed (30%) — someone turned them off.
2. Inlet filter screens clogged (25%) — mineral deposits blocking mesh.
3. Kinked inlet hoses (15%) — hose bent behind machine.
4. Low water pressure (10%) — whole-house pressure issue.
5. Frozen pipes (5%) — in winter/cold installations.
6. Faulty inlet valve (10%) — solenoid not opening electrically.
7. Water supply outage (5%) — municipal or building issue.
What You're Probably Seeing Right Now
- Machine displays 4C right after starting a cycle.
- You can hear the machine trying to fill but no water flowing.
- Drum is completely empty — no water entered at all.
- Or drum has some water but not enough — partial fill.
- Other water fixtures in the house are also low pressure.
DIY Fix — From Easiest to Hardest
1
Check Water Taps (30 seconds — Fixes 30%)
1. Find the hot and cold taps behind your washer.
2. Turn both fully counterclockwise (open).
3. If already open: close and reopen them fully.
4. Restart the cycle.
2. Turn both fully counterclockwise (open).
3. If already open: close and reopen them fully.
4. Restart the cycle.
2
Test Water Flow (1 minute)
1. Turn off both taps.
2. Disconnect inlet hoses from the back of the washer.
3. Point them into a bucket.
4. Turn on taps.
5. **Strong flow** (bucket fills in ~10 seconds) = valve or filter issue.
6. **Weak trickle** = water supply problem.
2. Disconnect inlet hoses from the back of the washer.
3. Point them into a bucket.
4. Turn on taps.
5. **Strong flow** (bucket fills in ~10 seconds) = valve or filter issue.
6. **Weak trickle** = water supply problem.
3
Clean Inlet Filter Screens (10 minutes — Fixes 25%)
1. Turn off both taps.
2. Unscrew hoses from the washer's back (hot and cold ports).
3. Find the small mesh filter screens inside the inlet ports.
4. Gently pull them out with needle-nose pliers.
5. Rinse under running water — remove all mineral deposits.
6. Reinstall screens, reconnect hoses hand-tight + 1/4 turn.
7. Turn on taps — check for leaks.
**Pro tip:** Clean these every 6 months as preventive maintenance.
2. Unscrew hoses from the washer's back (hot and cold ports).
3. Find the small mesh filter screens inside the inlet ports.
4. Gently pull them out with needle-nose pliers.
5. Rinse under running water — remove all mineral deposits.
6. Reinstall screens, reconnect hoses hand-tight + 1/4 turn.
7. Turn on taps — check for leaks.
**Pro tip:** Clean these every 6 months as preventive maintenance.
4
Check for Kinked Hoses (2 minutes)
1. Pull machine forward.
2. Inspect both inlet hoses along their full length.
3. Straighten any kinks.
4. Ensure hoses aren't crushed between the wall and the machine.
**Replace hoses if cracked or bulging** — braided stainless hoses are safest ($15-30 for a pair).
2. Inspect both inlet hoses along their full length.
3. Straighten any kinks.
4. Ensure hoses aren't crushed between the wall and the machine.
**Replace hoses if cracked or bulging** — braided stainless hoses are safest ($15-30 for a pair).
5
Check Water Pressure (2 minutes)
1. Open a nearby tap — is the flow normal?
2. Check other fixtures in the house.
3. **Low pressure everywhere** = call your water company.
4. Samsung requires minimum **0.5 bar (7 psi)** water pressure.
5. A partially closed main shutoff valve can reduce pressure.
2. Check other fixtures in the house.
3. **Low pressure everywhere** = call your water company.
4. Samsung requires minimum **0.5 bar (7 psi)** water pressure.
5. A partially closed main shutoff valve can reduce pressure.
6
Test the Inlet Valve (10 minutes)
If water supply is fine but machine still won't fill:
1. Unplug washer.
2. Access the inlet valve (back panel, top of machine).
3. Disconnect one solenoid at a time.
4. Measure resistance: **800-1500Ω** = good. **OL** = dead coil.
5. Replace valve assembly if bad ($25-60).
1. Unplug washer.
2. Access the inlet valve (back panel, top of machine).
3. Disconnect one solenoid at a time.
4. Measure resistance: **800-1500Ω** = good. **OL** = dead coil.
5. Replace valve assembly if bad ($25-60).
When to Call a Pro
- •Inlet valve failure — replacement: $80-$200 installed.
- •Main board not sending signal to valve — board issue: $150-$400.
- •Plumbing issue — frozen or damaged supply lines.
What It'll Cost You
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