3E Moderate Easy DIY
Samsung Dishwasher 3E — Hot water supply too hot
Samsung Dishwasher · Error code 3E
What 3E Means
Incoming water temperature is above the safe limit (above ~176°F / 80°C). The control aborts to protect components and plastics.
Symptoms
- 3E on display
- Cycle aborts early
- Steam coming from tub
- Detergent dispenser melts (in extreme cases)
Common Causes
1
Water heater set too high
Home water heater above 140°F sends water hot enough to trip this fault.
2
Dishwasher plumbed to wrong line
Connected to a recirculating loop running hotter than normal.
3
Failed inlet thermistor
Temperature sensor reads high incorrectly.
How to Fix It
- Lower the household water heater setpoint to 120°F (49°C) — the recommended setting for both safety and dishwasher specs.
- Run a cold-water rinse or wait an hour for plumbing to cool, then restart the dishwasher.
- If you have an instant recirculation loop, verify the supply line to the dishwasher is correct.
- If the code returns with water under 140°F at the tap, replace the inlet temperature sensor.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Samsung Dishwasher Codes
Verified against manufacturer documentation: samsung.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.