What 4C usually means
4C usually means the dishwasher did not detect normal water supply.
Codes can vary by exact Samsung dishwasher model number, production year, and regional design. Use this as first-pass guidance, then confirm the model-specific manual or manufacturer support page before opening panels or replacing parts.
First checks
Check the under-sink supply valve, visible hose bends, and household water pressure before moving the dishwasher.
A recently closed valve, kinked supply line, or plumbing work under the sink can trigger a fill warning.
- Open the dishwasher supply valve fully.
- Inspect the visible supply line under the sink.
- Confirm the sink faucet has normal pressure.
- Do not pull the dishwasher out just for a first check.
When to stop
Stop if water leaks under the sink, the valve will not turn safely, or 4C returns after visible supply checks.
Keep the full model number, exact 4C display text, cycle name, and timing ready before contacting Samsung support or a qualified technician.
Model numbers affected
Commonly searched model families include built-in dishwashers, front-control dishwashers, top-control dishwashers, and compact dishwashers.
This is not a confirmed model-number list. Match the exact code to the full model number on the appliance tag before ordering parts, opening panels, or booking service.
Related code pages
Editorial note
This guide is independent educational content. It does not replace the model-specific manual, official manufacturer support, or qualified repair service.