--- title: "Smeg dishwasher showing E4 | DishwasherRepair.center" description: "What E4 means on Smeg dishwashers, what to check before booking, and when it is not a failure at all." url: "https://dishwasherrepair.center/error-codes/smeg-e4/" --- # Smeg dishwasher showing E4 E4 means something is wrong with the way the dishwasher monitors water temperature. ## What E4 actually means. E4 means something is wrong with the way the dishwasher monitors water temperature. Smeg dishwasher display What to do when E4 shows on the dishwasher ### Kind of code Sensor circuit A temperature, turbidity or water-level sensor reporting a value outside its range, or the wiring to it. The reading is measured with a meter before any part is ordered. ### Usually leads to Controls and sensors Dead panels, stuck cycles and blinking lights, separated into board, keypad, sensor and wiring before a part is ordered. ### Shows up as Dishwasher Not Heating Water Dishes and the tub are cool at the end of the cycle, and grease stays on plates. ### Make Smeg Italian-designed dishwashers in built-in and panel-ready versions, sized for American kitchens. ### Source Smeg dishwasher user manual 19293010200, 6 Troubleshooting (doc.smeg.it PDF, linked from the smeg.com/us page for STU8222) Smeg dishwashers covered by manual 19293010200, including STU8222; the alarm appears as a light pattern the table calls E4. ## Before you book, in this order. Each step comes from Smeg's own guidance for E4 on its dishwashers. Follow it to the end: the last card says whether this is a visit. 01 Interrupt the program and turn the machine off. 02 Turn it on again, choose the program and start the cycle. 03 Book a visit if E4 is still there. ### Still there? It usually turns into [controls and sensors](https://dishwasherrepair.center/services/controls-and-sensors/). Book with the code and the model number. ### What not to do E4 concerns the monitoring of the temperature rather than the heating itself, which is E3. ## What you may notice with it. The dishwasher problems E4 tends to arrive with. Answer these at the dishwasher before anyone is booked. [All problems](https://dishwasherrepair.center/problems/) Before you call ### [Dishwasher Not Heating Water](https://dishwasherrepair.center/problems/dishwasher-not-heating/) [All 5 causes, cheapest first](https://dishwasherrepair.center/problems/dishwasher-not-heating/) It also comes with - [**Dishwasher Cycle Takes Too Long**](https://dishwasherrepair.center/problems/dishwasher-cycle-too-long/) Problem ### Dishwasher Not Heating Water 5 causes, cheapest first Where E4 usually leads ## Controls and sensors. **Control board, keypad or sensor · moderate.** Book a visit [What the job involves](https://dishwasherrepair.center/services/controls-and-sensors/) ## Read these before the visit. Short guides that make the call quicker and the diagnosis cheaper. [All guides](https://dishwasherrepair.center/guides/) What it is trying to tell you ### Why dishes come out dirty, read from the residue Checks you can make yourself ### Find your dishwasher's model number Error codes ### All 188 codes, by make ## Smeg dishwashers. Italian-designed dishwashers in built-in and panel-ready versions, sized for American kitchens. [Smeg dishwasher repair](https://dishwasherrepair.center/brands/smeg/) More Smeg codes [E1](https://dishwasherrepair.center/error-codes/smeg-e1/) [E2](https://dishwasherrepair.center/error-codes/smeg-e2/) [E3](https://dishwasherrepair.center/error-codes/smeg-e3/) [E5](https://dishwasherrepair.center/error-codes/smeg-e5/) [E6](https://dishwasherrepair.center/error-codes/smeg-e6/) Sensor circuit on other makes [Bertazzoni F6](https://dishwasherrepair.center/error-codes/bertazzoni-f6/) [Fisher & Paykel A70](https://dishwasherrepair.center/error-codes/fisher-and-paykel-a70/) [GE C7](https://dishwasherrepair.center/error-codes/ge-c7/) [LG tE](https://dishwasherrepair.center/error-codes/lg-te/) [Miele F1](https://dishwasherrepair.center/error-codes/miele-f1/) [Samsung tE](https://dishwasherrepair.center/error-codes/samsung-te/) [SKS tE](https://dishwasherrepair.center/error-codes/sks-te/) [Viking 4-1](https://dishwasherrepair.center/error-codes/viking-4-1/) [All 11 codes of this kind](https://dishwasherrepair.center/error-codes/#family-sensor-circuit) Smeg builds this ### Built-in dishwasher The standard 24-inch machine under the counter, and the one nearly every American kitchen has. Smeg builds this ### Panel-ready dishwasher Hidden behind a cabinet door, controlled from the top edge, and repaired with the panel's weight in mind. Smeg builds this ### Compact dishwasher The 18-inch and ADA-height machines for small kitchens, where the tight tub changes both loading and repairs. ## In Smeg's own words > Water temperature monitoring malfunction [Smeg dishwasher user manual 19293010200, 6 Troubleshooting (doc.smeg.it PDF, linked from the smeg.com/us page for STU8222)](https://doc.smeg.it/qr/19293010200/EN) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Smeg dishwashers covered by manual 19293010200, including STU8222; the alarm appears as a light pattern the table calls E4. ## Smeg E4 dishwasher repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Interrupt the program and turn the machine off. If it comes back, it needs a visit. ### Does E4 on my Smeg mean the heater has failed? Not necessarily; E4 concerns the way the machine monitors water temperature. A heating failure has its own code, E3. ### How do I reset my Smeg after E4? Interrupt the program, switch off, then switch on, choose the program again and start. A persisting E4 needs a visit. --- **[Read on the site: Smeg dishwasher showing E4 | DishwasherRepair.center](https://dishwasherrepair.center/error-codes/smeg-e4/)** **[Book a visit with DishwasherRepair.center](https://dishwasherrepair.center/schedule/)**