--- title: "Middleby Marshall HIGH LIMIT TRIPPED: the LongWave overheat cutout has opened" description: "What HIGH LIMIT TRIPPED means on Middleby Marshall HIGH LIMIT TRIPPED: the LongWave overheat cutout has openeds, what to check before booking, and when it is…" url: "https://commercialappliancerepair.center/error-codes/middleby-marshall-high-limit-tripped/" --- # Middleby Marshall HIGH LIMIT TRIPPED: the LongWave overheat cutout has opened The high limit is the LongWave's last line of defense against runaway heat. ## What HIGH LIMIT TRIPPED actually means. The high limit is the LongWave's last line of defense against runaway heat. When it trips, the screen shows HIGH LIMIT TRIPPED and an alarm sounds, and heating stops until the circuit is proven again. The manual gives one owner step, a power cycle, and asks for service if that does not clear it or if it keeps happening. Middleby Marshall commercial appliance display · also shown as HIGH LIMIT TRIPPED What to do when HIGH LIMIT TRIPPED shows on the commercial appliance ### Kind of code Temperature and alarms The controller has seen a temperature outside the band it was set for and is saying so: a box above its alarm point, a fryer vat or an oven cavity that tripped its high-limit, or a dish machine rinse that never came up to heat. Often the cause sits outside the unit, such as a door left open during a delivery, a coil packed with grease, a kitchen far hotter than the maker allows or a booster fed cold water. Checking the door, the coil and the air around the unit is fair; move the product if a cold box stays above 41°F, and book the visit. ### Usually leads to Reach-in and prep table repair Reach-ins, pass-throughs, prep tables and blast chillers: gaskets, hinges, fans, thermostats, condensers and compressors. ### 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 Middleby Marshall Middleby Marshall ovens on this site are the kitchen's non-pizza baking and roasting work; pizza service calls belong to our pizza oven site. ### Source Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F) Middleby Marshall LongWave LW26 and LW33 infrared conveyor ovens (manual Rev F). ## Before you book, in this order. Each step comes from Middleby Marshall's own guidance for HIGH LIMIT TRIPPED on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Clear the belt of product and let the oven cool down. 02 Power the oven off and back on once, as the manual allows. 03 If the power cycle fails or the trip repeats, keep the oven down until a technician finds what overheated it. ### Still there? It usually turns into [reach-in and prep table repair](https://commercialappliancerepair.center/services/reach-in-and-prep-table-repair/). Book with the code and the model number. ### What not to do HIGH LIMIT TRIPPED is not a probe reading problem or a low temperature alarm. On a LongWave it means the safety device itself opened, which usually follows real overheating or a failing limit. ## What you may notice with it. The commercial appliance problems HIGH LIMIT TRIPPED 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 - [**Restaurant Equipment Burning Smell: Scorched Oil, Hot Wiring or Lint**](https://commercialappliancerepair.center/problems/commercial-burning-smell/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where HIGH LIMIT TRIPPED usually leads ## Reach-in and prep table repair. **Reach-in, pass-through or prep table gasket, hinge, fan motor, thermostat or controller, defrost heater, leak repair or compressor · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/reach-in-and-prep-table-repair/) ## Middleby Marshall commercial appliances. Middleby Marshall ovens on this site are the kitchen's non-pizza baking and roasting work; pizza service calls belong to our pizza oven site. [Middleby Marshall commercial appliance repair](https://commercialappliancerepair.center/brands/middleby-marshall/) More Middleby Marshall codes [IO_COMM_LOST](https://commercialappliancerepair.center/error-codes/middleby-marshall-io-comm-lost/) [MC1_COMM_LOST](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc1-comm-lost/) [MC2_COMM_LOST](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc2-comm-lost/) [PROBE_TL_FAULT](https://commercialappliancerepair.center/error-codes/middleby-marshall-probe-tl-error/) [FAN_HIGH_CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-fan-high-current/) [FAN LOW CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-fan-low-current/) [MC1_HIGH_CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc1-high-current/) [LIMIT BOARD HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-limit-board-high-temp/) [LIMIT BOARD PROBE FAULT](https://commercialappliancerepair.center/error-codes/middleby-marshall-limit-board-probe-error/) [IO BOARD HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-io-board-high-temp/) [CONTROL COMPARTMENT HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-control-compartment-high-temp/) [HIGH TEMP CHECK FANS](https://commercialappliancerepair.center/error-codes/middleby-marshall-high-temp-check-fans/) [All 14 Middleby Marshall codes](https://commercialappliancerepair.center/error-codes/#codes-middleby-marshall) Temperature and alarms on other makes [Alto-Shaam E13](https://commercialappliancerepair.center/error-codes/alto-shaam-e13/) [Beverage-Air Hi](https://commercialappliancerepair.center/error-codes/beverage-air-hi/) [Blodgett Cavity High Temp Error](https://commercialappliancerepair.center/error-codes/blodgett-cavity-high-temp-error/) [Cleveland RESET light](https://commercialappliancerepair.center/error-codes/cleveland-reset-light/) [Continental Refrigerator HI](https://commercialappliancerepair.center/error-codes/continental-refrigerator-hi/) [Delfield Hi](https://commercialappliancerepair.center/error-codes/delfield-hi/) [Frymaster E16](https://commercialappliancerepair.center/error-codes/frymaster-e16/) [Garland E04](https://commercialappliancerepair.center/error-codes/garland-e04/) [All 68 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-temperature) Middleby Marshall 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 Middleby Marshall's own words > The high limit has tripped; the oven does not detect the high limit. [Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F)](https://www.middlebymarshall.com/wp-content/uploads/2025/04/Long-Wave-LW26-LW33-Rev-F.pdf) [Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F)](https://www.middlebymarshall.com/wp-content/uploads/2025/04/Long-Wave-LW26-LW33-Rev-F.pdf) [Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F)](https://www.middlebymarshall.com/wp-content/uploads/2025/04/Long-Wave-LW26-LW33-Rev-F.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Middleby Marshall LongWave LW26 and LW33 infrared conveyor ovens (manual Rev F). ## Middleby Marshall HIGH LIMIT TRIPPED 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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Clear the belt of product and let the oven cool down. If it comes back, it needs a visit. ### How do I reset HIGH LIMIT TRIPPED on a LongWave? The manual gives a power cycle as the only owner step. If that does not clear it, the limit needs a technician. ### Why does the LongWave high limit trip on busy days? Heavy loading does not normally trip it; a heater that will not switch off or poor ventilation is more likely. A repeat needs a visit. ### Is it safe to bypass the LongWave high limit? No. It is there to stop a fire or heat damage, and bypassing it removes that protection. --- **[Read on the site: Middleby Marshall HIGH LIMIT TRIPPED: the LongWave overheat cutout has opened](https://commercialappliancerepair.center/error-codes/middleby-marshall-high-limit-tripped/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**