Samsung · Dishwasher

E1

Water Supply Error

Severity

High

If your Samsung Dishwasher is displaying the error code E1, the control board has detected a fault identified as "Water Supply Error". Understanding the root cause helps you avoid an unnecessary service call.

Owner's Summary

Your Samsung dishwasher cannot get water. The most common cause is simply a partially closed valve under the sink. Turn it fully counterclockwise and try again before spending money on parts.

Symptoms

Samsung dishwasher not filling with water, stops at start of cycle, E1 displayed

Common Causes

Water supply valve under sink closed
Kinked or blocked inlet hose
Clogged inlet valve filter screen
Faulty water inlet valve solenoid

How to Fix

1 Open water supply valve fully under the sink
2 Straighten and inspect inlet hose for blockages
3 Remove hose and clean inlet screen filter
4 Replace water inlet valve if all checks pass

Tools You'll Need

Pliers Soft Brush Towels / Bucket Flashlight

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

The main PCB energizes the inlet valve solenoid at cycle start and monitors the pressure sensor for a rising water level. If no level change is detected within the fill timeout window, E1 is posted and the solenoid is de-energized.

Is It Safe to Keep Using?

No immediate risk to the appliance. Resolve within a few days.

Technician's Pro Tip

Samsung dishwasher inlet valves have a fine mesh screen inside the solenoid body itself — not just at the hose connection. Disassemble the valve and clean both screens before condemning the valve.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code E1 mean on a Samsung Dishwasher?

Code E1 on a Samsung Dishwasher indicates "Water Supply Error." In practice, the most common trigger is water supply valve under sink closed. Severity is rated high, and typical repair costs range from $0 to $160.

Can I fix E1 myself, or do I need a technician?

Many cases of E1 can be resolved without a technician. The first step to try: open water supply valve fully under the sink. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code E1 showing?

No immediate risk to the appliance. Resolve within a few days.

How much does it cost to repair E1 on a Samsung Dishwasher?

Repair costs for code E1 typically range from $0 to $160. Hose and screen check: $0; Inlet valve: $40–$160. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $160

Hose and screen check: $0; Inlet valve: $40–$160