Samsung Dishwasher Error Code E2

Samsung Dishwasher Error Code E2 — What it Means

The E2 error code on a Samsung dishwasher commonly indicates a problem with the unit’s heating circuit or temperature sensing — for example the machine is not detecting the expected water or internal temperature during a cycle. This can be caused by a faulty heating element, a malfunctioning temperature sensor (NTC/thermistor), a failed relay or control board output, damaged wiring, or in some cases a triggered leak/flood sensor that interrupts heating. Users typically notice incomplete drying, longer cycle times, poor wash results, or the dishwasher stopping mid-cycle. In some situations the heater may try to run repeatedly and shorten component life or increase energy use; in rare cases electrical faults can create a safety risk, so it’s important to diagnose and address the cause promptly.

Common Causes

• Faulty heating element (open, shorted, or partially failed)
• Defective temperature sensor (NTC/thermistor) giving incorrect readings
• Main control board or relay failure preventing heater activation
• Broken or corroded wiring and connectors in the heating circuit
• Triggered float or leakage sensor that disables heating for safety
• Software/glitch requiring a control board reset or firmware reload
• Failed high-limit thermostat or safety cutout

Troubleshooting Steps

1. Safety first: Turn off power at the breaker or unplug the dishwasher before inspecting electrical components. Do not attempt live electrical testing unless you are qualified.
2. Power cycle / reset: Switch power off for 1–5 minutes and back on to clear transient faults. Many control errors clear after a reset.
3. Run a diagnostics cycle: Enter the dishwasher’s service/diagnostic mode (consult your model’s service manual) to read stored fault codes and test heater/NTC operation.
4. Inspect for leaks: Check under the dishwasher for pooling water or a triggered float sensor in the base pan. Dry the area and reset if a leak caused the error.
5. Check wiring and connectors: Visually inspect wiring to the heater and sensor for burns, corrosion, or disconnected plugs. Tighten or replace damaged connectors.
6. Test the temperature sensor (NTC): Remove the sensor and measure resistance with a multimeter. Compare to the service manual values or check for continuity (no open circuit). Replace if out of spec.
7. Test the heating element: With power removed, check the element for continuity and for shorts to ground. If open or shorted, replace the element.
8. Inspect the control board/relay: Look for burned components, bulging capacitors, or damaged solder joints on the PCB. A failed relay or board often requires replacement.
9. Check safety devices: Test high-limit thermostats or thermal fuses if present — a blown safety device can prevent heating and cause E2.
10. Swap known-good parts when possible: If you have access to compatible replacement components, swapping the sensor or element can quickly confirm the failing part.
11. Contact Samsung or a qualified technician: If diagnostics point to the control board or you’re unsure of wiring/electrical safety, call a professional for repair or part replacement.

Maintenance / Prevention Tips

• Run a regular cleaning cycle to remove hard water and detergent buildup that can affect sensors.
• Use the correct detergent and rinse aid to avoid excessive residue that can coat sensors and heating elements.
• Inspect door seals and spray arms periodically to prevent leaks that could trigger safety sensors.
• Keep the area under the dishwasher dry and check the base pan for moisture monthly.
• Avoid overloading the dishwasher which can restrict water flow and increase heating workload.
• Check and clean the filter and pump area to maintain proper circulation and heating efficiency.
• Use water softener or descaler if you have very hard water to reduce limescale on heating parts.
• Visually inspect wiring harnesses during annual maintenance for wear or rodent damage.
• Replace worn or cracked connectors; don’t rely on corroded terminals.
• Schedule periodic professional service if the dishwasher is heavily used (commercial or large households).
• Power-cycle the appliance occasionally to allow the control board to clear temporary faults.
• Follow manufacturer load and detergent recommendations to reduce stress on the heater and sensors.
• Keep the exterior vents clear so the control electronics don’t overheat.
• Address minor faults promptly — small sensor or element issues can grow into major failures.

FAQs

Conclusion / Safety Notice

Addressing an E2 code promptly protects performance, energy efficiency, and safety. If troubleshooting steps (resetting, visual inspections, simple continuity checks) do not resolve the error, or if you find damaged wiring or a faulty control board, stop using the appliance and consult a qualified technician. Electrical components can present shock and fire hazards if handled incorrectly.

If you are not comfortable with electrical testing or the repair requires replacing major parts like the PCB, heating element, or internal wiring, contact Samsung support or a licensed appliance repair professional to ensure a safe and correct repair.