--- title: "Smeg oven showing Error 4 | OvenRepair.center" description: "What Error 4 means on Smeg ovens, what to check before booking, and when it is not a failure at all." url: "https://ovenrepair.center/error-codes/smeg-error-4/" --- # Smeg oven showing Error 4 On Smeg's US self-clean ovens, Error 4 is the message for a door lock malfunction during the SELF CLEAN function. ## What Error 4 actually means. On Smeg's US self-clean ovens, Error 4 is the message for a door lock malfunction during the SELF CLEAN function. No other function can be chosen while the lock device is engaged. Smeg oven display What to do when Error 4 shows on the oven ### Kind of code Door and lock The motorized lock did not reach the position the control asked for, or its switch reported the wrong one. Most often this shows during or after self-clean; the latch, its switches and the door's alignment are checked before the lock motor is replaced. ### Usually leads to Door lock and self-clean repair A door that stays locked after self-clean, a cycle that will not start or stops early, traced to the lock motor, its switches or the cleaning heat. ### Shows up as Oven Self-Clean Problems Self-clean will not start, stops part way, leaves the oven dirty, or the oven stops working right after it. ### Make Smeg An Italian manufacturer with built-in ovens in several design lines, sized in 24 and 30 inches for American kitchens. ### Source Smeg US manual 91477B177 for the SOPU3104TPG / SOPU3304TPX self-clean ovens (doc.smeg.it) From Smeg US manual 91477B177, linked from the SOPU3104TPG and SOPU3304TPX product pages. ## Before you book, in this order. Each step comes from Smeg's own guidance for Error 4 on its ovens. Follow it to the end: the last card says whether this is a visit. 01 Switch the oven off, then back on. 02 If the door still does not unlock once the cavity has cooled, leave the lock lever alone. 03 Book a visit if Error 4 returns. ### Still there? It usually turns into [door lock and self-clean repair](https://ovenrepair.center/services/door-lock-and-self-clean-repair/). Book with the code and the model number. ### What not to do Error 4 is not the normal cool-down lock. After self-clean, Smeg keeps the door locked until the cavity is back to a safe temperature, and that wait is expected. ## What you may notice with it. The oven problems Error 4 tends to arrive with. Answer these at the oven before anyone is booked. [All problems](https://ovenrepair.center/problems/) Before you call ### [Oven Self-Clean Problems](https://ovenrepair.center/problems/self-clean-problems/) [All 5 causes, cheapest first](https://ovenrepair.center/problems/self-clean-problems/) It also comes with - [**Oven Door Won't Unlock**](https://ovenrepair.center/problems/oven-door-wont-unlock/) - [**Oven Error Code**](https://ovenrepair.center/problems/oven-error-code/) Problem ### Oven Self-Clean Problems 5 causes, cheapest first Where Error 4 usually leads ## Door lock and self-clean repair. **Door lock motor and switches · low to moderate.** Book a visit [What the job involves](https://ovenrepair.center/services/door-lock-and-self-clean-repair/) ## Smeg ovens. An Italian manufacturer with built-in ovens in several design lines, sized in 24 and 30 inches for American kitchens. [Smeg oven repair](https://ovenrepair.center/brands/smeg/) More Smeg codes [Show Room](https://ovenrepair.center/error-codes/smeg-show-room/) Door and lock on other makes [Café Unlock Door](https://ovenrepair.center/error-codes/cafe-unlock-door/) [Dacor C-d1](https://ovenrepair.center/error-codes/dacor-c-d1/) [Electrolux F90](https://ovenrepair.center/error-codes/electrolux-f90/) [Fisher & Paykel A2](https://ovenrepair.center/error-codes/fisher-and-paykel-a2/) [Frigidaire F90](https://ovenrepair.center/error-codes/frigidaire-f90/) [Fulgor Milano F03](https://ovenrepair.center/error-codes/fulgor-milano-f03/) [GE Profile FC](https://ovenrepair.center/error-codes/ge-profile-fc/) [GE F9](https://ovenrepair.center/error-codes/ge-f9/) [All 26 codes of this kind](https://ovenrepair.center/error-codes/#family-door) Smeg builds this ### Single wall oven One oven cavity set into a cabinet at chest height, with its own controls above the door and nothing to cook on above it. Smeg builds this ### Steam oven A built-in oven that adds water vapor to the cavity, alone or with convection heat, fed from a tank or a water line. Smeg builds this ### Speed oven A compact built-in oven that combines convection heat with microwave energy in one cavity to cook in a fraction of the usual time. ## In Smeg's own words > In case of door lock malfunction, the message "Error 4" displays. [Smeg US manual 91477B177 for the SOPU3104TPG / SOPU3304TPX self-clean ovens (doc.smeg.it)](https://doc.smeg.it/qr/91477B177/EN) [Smeg US manual 91477B177 for the SOPU3104TPG / SOPU3304TPX self-clean ovens (doc.smeg.it)](https://doc.smeg.it/qr/91477B177/EN) [Smeg US manual 91477B177 for the SOPU3104TPG / SOPU3304TPX self-clean ovens (doc.smeg.it)](https://doc.smeg.it/qr/91477B177/EN) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. From Smeg US manual 91477B177, linked from the SOPU3104TPG and SOPU3304TPX product pages. ## Smeg Error 4 oven 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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Switch the oven off, then back on. If it comes back, it needs a visit. ### Can I release the Smeg door lock lever by hand after Error 4? Smeg warns never to release the lever manually during self-clean, because it risks damaging the lock and the door glass. Turn the oven off and on, and book a visit if the lock stays. ### Does Error 4 on a Smeg mean self-clean finished? No. It means the lock device did not behave as it should. A normal cycle ends with a beep and a return to the main menu. --- **[Read on the site: Smeg oven showing Error 4 | OvenRepair.center](https://ovenrepair.center/error-codes/smeg-error-4/)** **[Book a visit with OvenRepair.center](https://ovenrepair.center/schedule/)**