SMEG Dishwasher E4 Error Code — Meaning & Causes (2026)
Temperature sensor (NTC thermistor) fault. Below: what triggers it and what to check — this code carries no single repair to price. Reviewed July 2026.
What E4 means
Temperature sensor (NTC thermistor) fault.
Likely causes, most common first
- The temperature probe reads out of range or open/short — a faulty NTC sensor or its wiring.
Base: 3 published national repair-cost guides (retrieved 2026-07) · full source registry on the methodology page · Code meaning & causes · Reviewed July 2026
No single repair to price for this code
E4 doesn't point at one failed component, so we don't attach a price module — forcing a repair mapping here would be dishonest. If the code keeps returning, the underlying symptom (not the code) is what gets priced: browse the dishwasher repair costs for the problem you're actually seeing.
Codes are universal — your location changes the repair price, never the code's meaning. See the methodology for the exact localization formula and sources.
Reviewed by a Red-Seal certified appliance technician.