--- title: "Alto-Shaam E105: no or low water pressure at the oven" description: "What E105 means on Alto-Shaam E105: no or low water pressure at the ovens, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/alto-shaam-e105/" --- # Alto-Shaam E105: no or low water pressure at the oven The CTP checks that its incoming water has enough pressure before it relies on it. ## What E105 actually means. The CTP checks that its incoming water has enough pressure before it relies on it. E105 is called out when the pressure switch does not activate. The manual lists a disconnected or closed supply, or a blocked line, with the water filter as the place to look. Alto-Shaam commercial appliance display What to do when E105 shows on the commercial appliance ### Kind of code Water, fill and drain Water is not arriving, not reaching its level, not heating or not leaving on time. A dish machine may be short of fill because a supply valve is half closed or its line strainer is clogged, it may drain slowly through a scrap basket full of debris, or its booster may be too scaled to heat the rinse; a combi's steam generator may be scaled or its water treatment exhausted; a washer-extractor may time out on a slow drain. Opening the supply valve, cleaning strainers with the unit off and checking the drain line are fair; a pump, a fill valve, a heater or a leak near wiring is a visit. ### Usually leads to Dish machine repair Undercounter, door-type and conveyor dish machines: tank heaters, boosters, wash pumps, fill and drain valves. ### Shows up as Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone. ### Make Alto-Shaam An Alto-Shaam call is usually booked for the hours between the last plate and the prep crew, so the cabinet can cool and the tech can open it without holding up service. ### Source Alto-Shaam Combitherm CT PROformance Series operator's manual, MN-35948 Rev 21 (10/21) (Wayback copy) Combitherm CT PROformance (CTP) combi ovens, error code table in operator's manual MN-35948 Rev 21. ## Before you book, in this order. Each step comes from Alto-Shaam's own guidance for E105 on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Check that the water supply is connected and its valve is open. 02 Look at the water filter ahead of the oven; a clogged cartridge can starve the line. 03 When supply and filter both look right and E105 remains, book a visit. ### Still there? It usually turns into [dish machine repair](https://commercialappliancerepair.center/services/dish-machine-repair/). Book with the code and the model number. ### What not to do E105 is not the steam generator failing to fill, which roll-in models report as E01 or E51. It is also different from E57, which watches the rinse water flow alone. ## What you may notice with it. The commercial appliance problems E105 tends to arrive with. Answer these at the commercial appliance before anyone is booked. [All problems](https://commercialappliancerepair.center/problems/) Before you call ### [Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display](https://commercialappliancerepair.center/problems/commercial-error-code/) [All 8 causes, cheapest first](https://commercialappliancerepair.center/problems/commercial-error-code/) It also comes with - [**Combi Oven Steam Problem: Weak Steam, Scale or a Dry Cavity**](https://commercialappliancerepair.center/problems/combi-oven-steam-problem/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where E105 usually leads ## Dish machine repair. **Dish machine tank heater or booster element, thermostat, fill valve, float switch, drain valve, wash pump seal or motor, conveyor drive · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/dish-machine-repair/) ## Alto-Shaam commercial appliances. An Alto-Shaam call is usually booked for the hours between the last plate and the prep crew, so the cabinet can cool and the tech can open it without holding up service. [Alto-Shaam commercial appliance repair](https://commercialappliancerepair.center/brands/alto-shaam/) More Alto-Shaam codes [E01](https://commercialappliancerepair.center/error-codes/alto-shaam-e01/) [E02](https://commercialappliancerepair.center/error-codes/alto-shaam-e02/) [E03](https://commercialappliancerepair.center/error-codes/alto-shaam-e03/) [E13](https://commercialappliancerepair.center/error-codes/alto-shaam-e13/) [E20](https://commercialappliancerepair.center/error-codes/alto-shaam-e20/) [E21](https://commercialappliancerepair.center/error-codes/alto-shaam-e21/) [E34](https://commercialappliancerepair.center/error-codes/alto-shaam-e34/) [E36](https://commercialappliancerepair.center/error-codes/alto-shaam-e36/) [E57](https://commercialappliancerepair.center/error-codes/alto-shaam-e57/) [E89](https://commercialappliancerepair.center/error-codes/alto-shaam-e89/) [E92](https://commercialappliancerepair.center/error-codes/alto-shaam-e92/) [E100](https://commercialappliancerepair.center/error-codes/alto-shaam-e100/) [All 15 Alto-Shaam codes](https://commercialappliancerepair.center/error-codes/#codes-alto-shaam) Water, fill and drain on other makes [Blodgett Water Level Error](https://commercialappliancerepair.center/error-codes/blodgett-water-level-error/) [Cleveland LOW WATER light](https://commercialappliancerepair.center/error-codes/cleveland-low-water-light/) [Dexter F2](https://commercialappliancerepair.center/error-codes/dexter-f2/) [Frymaster E33](https://commercialappliancerepair.center/error-codes/frymaster-e33/) [Hatco LO H2O](https://commercialappliancerepair.center/error-codes/hatco-lo-h2o/) [Hobart 019](https://commercialappliancerepair.center/error-codes/hobart-019/) [Miele Professional F18](https://commercialappliancerepair.center/error-codes/miele-professional-f18/) [Pitco DRAINING TURN OFF](https://commercialappliancerepair.center/error-codes/pitco-draining-turn-off/) [All 45 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-water) Alto-Shaam builds this ### Commercial cold storage Reach-in and pass-through cabinets, walk-in coolers and walk-in freezers, prep and sandwich tables, undercounter units and blast chillers that hold a kitchen's food at safe temperatures. Alto-Shaam builds this ### Commercial cooking equipment Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line. ## In Alto-Shaam's own words > Water pressure switch not activated. [Alto-Shaam Combitherm CT PROformance Series operator's manual, MN-35948 Rev 21 (10/21) (Wayback copy)](https://web.archive.org/web/20220509173647/https://www.alto-shaam.com/en/media-library/widen-assets/technical-literature/operators-manual/operators-manual_combitherm_ctp_mn-35948-en-18-pdf.pdf) [Alto-Shaam Combitherm CT PROformance Series operator's manual, MN-35948 Rev 21 (10/21) (Wayback copy)](https://web.archive.org/web/20220509173647/https://www.alto-shaam.com/en/media-library/widen-assets/technical-literature/operators-manual/operators-manual_combitherm_ctp_mn-35948-en-18-pdf.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Combitherm CT PROformance (CTP) combi ovens, error code table in operator's manual MN-35948 Rev 21. ## Alto-Shaam E105 commercial appliance 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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Check that the water supply is connected and its valve is open. If it comes back, it needs a visit. ### Why did my Alto-Shaam show E105 right after a filter change? The valve may not have been fully reopened, or air is still in the line. Open the valve fully and let water run through before trying again. ### Does a clogged water filter cause E105 on an Alto-Shaam? It can. The manual points to the filter when the supply is blocked or obstructed. ### Can I bake on an Alto-Shaam with E105? Dry heat may still work, but steam needs water. A code that outlasts a good supply needs a technician. --- **[Read on the site: Alto-Shaam E105: no or low water pressure at the oven](https://commercialappliancerepair.center/error-codes/alto-shaam-e105/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**