Samsung dishwasher 4C / 4E: water supply error
Samsung says dishwasher 4C/4E means the unit is not receiving water at the pressure or temperature it needs. The path checks household supply requirements and accessible line conditions before service.
What this guide covers
Error codes: 4C, 4E
This guide follows a structured decision tree built from manufacturer troubleshooting information. It does not assume that the most commonly replaced part is the failed part, and it does not show an exact-fit replacement part unless model compatibility has been independently verified.
Continue this exact diagnostic
Safe troubleshooting sequence
Start with the observations and external checks that can be verified without opening energized assemblies. The interactive version asks these in order and changes the path based on your answers.
- Confirm the household water supplySamsung’s current dishwasher requirements call for hot water around 120–149°F and pressure around 20–120 psi.
- Inspect the accessible supply lineKinks, leaks, or an installation problem in the line can reduce supply pressure.
What the answers can lead to
Restore the dishwasher water supply
A closed valve or unavailable hot-water supply can trigger a water-supply error.
Evidence strength: Strong
Correct the supply-line problem with water shut off
The dishwasher needs a stable, leak-free supply within Samsung’s pressure/temperature requirements.
Evidence strength: Strong
4C / 4E persists with a normal external water supply
The remaining issue can involve pressure, inlet control, sensing, or another internal condition.
Evidence strength: Strong
When professional diagnosis is the safer next step
The dishwasher needs a stable, leak-free supply within Samsung’s pressure/temperature requirements. The remaining issue can involve pressure, inlet control, sensing, or another internal condition.
Appliance Verdict stops before energized electrical testing, gas-system work, sealed-system work, and other checks that can create unnecessary risk. A technician can use the model, issue, and completed checks from the interactive diagnostic as a starting point.
Repair or replace?
A diagnosis and a repair decision are different questions. Once you have a real repair quote, compare the total repair cost with the all-in price of a comparable replacement. Warranty or protection-plan coverage, appliance age, reliability history, efficiency, and likely future repairs can all matter. Appliance Verdict’s interactive result includes a transparent cost comparison rather than a black-box replacement recommendation.
Manufacturer sources
Samsung Support · Samsung Support
Dataset reviewed through 2026-09-11. Appliance Verdict is independent and is not endorsed by the manufacturers cited. Always follow the exact owner or service documentation for your model.
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