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Samsung Dishwasher Error Code 3E: High temperature water supply error
Applies to Samsung dishwashers that show 3E on the display.
The water being supplied to the dishwasher is too hot.
What this code means
Samsung dishwashers fill with hot water from the home supply. If that water arrives hotter than the machine's limit, it stops and flags 3E rather than wash with it.
The manufacturer's checks, in order
- Check the temperature of your home's hot water supply — if it is set extremely high, turn the water heater down.
If your supply temperature is normal and 3E persists, request service — the machine's temperature sensing is likely at fault.
Parts involved in this fault
| Part | Why it is involved | Typical price | |
|---|---|---|---|
| Heating element | The element that heats the water; fails open-circuit with age and scale. | $40-$100 | Check priceaffiliate slot |
| Thermistor | The temperature sensor that works with the heater. | $10-$25 | Check priceaffiliate slot |
Related Samsung dishwasher codes
1E — Clogged filter error (Waterwall models)4E — Water supply error5E — Drain errorLE — Leakage errorHC — High temperature heater error7E — Waterwall reflector error
Source & provenance. The meaning, the checks and their order, and the service line on this page are restated from Samsung official support — “Samsung dishwasher is displaying an error code” (US) and “Common Samsung dishwasher error codes and their meaning” (CA) (source), read on 2026-11-06. No forum content, no invented repair steps, and nothing involving gas, refrigerant or mains wiring. Where the manufacturer says to request service, this page stops too.