Samsung dishwasher 4C: Water supply is insufficient

Documentation checkedBy ErrHiveUpdated October 28, 2026

THE SHORT ANSWER

Water supply is insufficient.

4C means the dishwasher is not receiving the required water supply. Begin with the accessible supply valve and installation.

First safe check

Confirm that the dishwasher’s supply shutoff is open.

Applies to

Samsung dishwasher families covered by the cited US guidance. Match the full model number and exact display; this is not an exact-model compatibility claim.

Before you start

Let the interior cool before reaching inside. Watch for sharp debris. Leave electrical, heater and pump access to a qualified technician.

Go to safe checks

WHAT YOU MAY NOTICE

Symptoms to record

The dishwasher displays 4C.

WORK THROUGH THE BASICS

Safe troubleshooting checks

0 of 2 checked

Use the checkboxes to keep track as you read. Stop at any warning or step that does not match your appliance.

Inspect the visible supply
Look for a kinked or damaged accessible hose; do not pull a built-in machine out against its wiring or plumbing.
What to note
No visible restriction is left unaddressed.
Verify installation requirements
Ask the installer to check model-specific temperature and pressure if the supply is uncertain.
What to note
The supply meets the installation specification.

THE DETAILS MATTER

Scope & troubleshooting notes

How to interpret this result

A water warning does not automatically mean a failed inlet valve. Separate a closed household valve or installation issue from a fault that remains on a verified supply.

YOUR NEXT DECISION

When to stop and get help

Arrange Samsung service if the condition remains after the listed owner checks, or if damage prevents completing them safely.

Record what you see

Keep the full model number, exact displayed code, and your observations together for the next conversation.

Use the right support

Contact the manufacturer or a qualified appliance technician when the guide calls for service.

Samsung support

THE EVIDENCE

Sources & verification

Our explanations are editorial summaries of the documentation below. They do not replace the instructions for your exact appliance.

Samsung dishwasher is displaying an error code
Samsung · Manufacturer support · Checked Oct 28, 2026
Code-specific headings — Samsung US consumer support; check the model manual before applying a procedure.
Samsung dishwasher water supply requirements
Samsung · Manufacturer support · Checked Oct 28, 2026
Temperature and pressure requirements — Samsung US consumer support; check the model manual before applying a procedure.

ErrHive is an independent information resource, not an authorized representative of Samsung. Follow your appliance’s manual. Hazardous repairs belong with qualified professionals. Read our safety policy.