--- title: "Frymaster E18: oil passed 460°F and the high limit did not open" description: "What E18 means on Frymaster E18: oil passed 460°F and the high limit did not opens, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/frymaster-e18/" --- # Frymaster E18: oil passed 460°F and the high limit did not open The controller shows HIGH LIMIT PROBLEM together with DISCONNECT POWER. ## What E18 actually means. The controller shows HIGH LIMIT PROBLEM together with DISCONNECT POWER. Both the primary control and the mechanical backup have failed to stop the heat, so nothing inside the fryer can be trusted to limit oil temperature. Frymaster's instruction is to remove power from the fryer immediately. Frymaster commercial appliance display · also shown as HIGH LIMIT PROBLEM DISCONNECT POWER, HIGH LIMIT FAILURE, HELP HI-2 What to do when E18 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 Frymaster A Frymaster fryer is serviced cold: the visit waits until the oil has come down and the vat has been drained by the crew. ### Source Frymaster FilterQuick FQG30U easyTouch gas fryer manual with FQ4000 controller (error log codes, section 5.6) FQ4000 easyTouch touchscreen controller on FilterQuick fryers (FQG30U and related FilterQuick gas and electric models). The M3000 high-limit test shows HIGH LIMIT FAILURE alternating with DISCONNECT POWER when the second high limit fails to open. ## Before you book, in this order. Each step comes from Frymaster's own guidance for E18 on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Switch the fryer off and then cut its power at the breaker or unplug the cord if it can be reached safely and without leaning over hot oil. 02 Clear the area, keep the Class K extinguisher and the hood suppression pull ready, and call 911 at the first sign of flame. 03 Tag the fryer out of service so nobody restarts it, and book a visit; it must not run again until both safety stages are repaired. ### 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 E18 is not a probe reading issue that can be waited out like E13; it reports real, extreme heat plus a failed safety. Nor does it match E17, where the backup switch opened correctly. ## What you may notice with it. The commercial appliance problems E18 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 - [**Commercial Fryer Fire or Grease Flare Under the Hood**](https://commercialappliancerepair.center/problems/commercial-fryer-fire/) - [**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 E18 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/) ## Frymaster commercial appliances. A Frymaster fryer is serviced cold: the visit waits until the oil has come down and the vat has been drained by the crew. [Frymaster commercial appliance repair](https://commercialappliancerepair.center/brands/frymaster/) More Frymaster codes [E13](https://commercialappliancerepair.center/error-codes/frymaster-e13/) [E16](https://commercialappliancerepair.center/error-codes/frymaster-e16/) [E17](https://commercialappliancerepair.center/error-codes/frymaster-e17/) [E19](https://commercialappliancerepair.center/error-codes/frymaster-e19/) [E25](https://commercialappliancerepair.center/error-codes/frymaster-e25/) [E28](https://commercialappliancerepair.center/error-codes/frymaster-e28/) [E33](https://commercialappliancerepair.center/error-codes/frymaster-e33/) [E39](https://commercialappliancerepair.center/error-codes/frymaster-e39/) [E41](https://commercialappliancerepair.center/error-codes/frymaster-e41/) [E42](https://commercialappliancerepair.center/error-codes/frymaster-e42/) [E44](https://commercialappliancerepair.center/error-codes/frymaster-e44/) [E53](https://commercialappliancerepair.center/error-codes/frymaster-e53/) [All 15 Frymaster codes](https://commercialappliancerepair.center/error-codes/#codes-frymaster) 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/) [Garland E04](https://commercialappliancerepair.center/error-codes/garland-e04/) [Hatco Control Board Overtemp](https://commercialappliancerepair.center/error-codes/hatco-control-board-overtemp/) [All 68 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-temperature) Frymaster 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 Frymaster's own words > Vat temperature exceeds 460°F (238°C) and [Frymaster FilterQuick FQG30U easyTouch gas fryer manual with FQ4000 controller (error log codes, section 5.6)](http://fm-xweb.frymaster.com/service/udocs/Manuals/8197521.pdf) [Frymaster FilterQuick FQG30U easyTouch gas fryer manual with FQ4000 controller (error log codes, section 5.6)](http://fm-xweb.frymaster.com/service/udocs/Manuals/8197521.pdf) [Frymaster Manual LOV M3000 controller operation manual, 02/2025 (E-log error codes)](http://fm-xweb.frymaster.com/service/udocs/Manuals/8196964.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. FQ4000 easyTouch touchscreen controller on FilterQuick fryers (FQG30U and related FilterQuick gas and electric models). The M3000 high-limit test shows HIGH LIMIT FAILURE alternating with DISCONNECT POWER when the second high limit fails to open. ## Frymaster E18 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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Switch the fryer off and then cut its power at the breaker or unplug the cord if it can be reached safely and without leaning over hot oil. If it comes back, it needs a visit. ### Is E18 on a Frymaster an emergency? Yes. The oil is far above frying heat and the safety that should have stopped it did not, so treat the vat as a fire risk until it has cooled and power is off. ### Can we finish service on the other Frymaster vats after an E18? Only if the other vats are on separate controls and power and are reading normally. The vat that logged E18 stays off and tagged until a technician has replaced what failed. ### What usually fails to cause a Frymaster E18? It takes two failures at once: something kept feeding heat, such as a stuck contactor or gas valve, and the mechanical high limit did not open. The visit covers both. --- **[Read on the site: Frymaster E18: oil passed 460°F and the high limit did not open](https://commercialappliancerepair.center/error-codes/frymaster-e18/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**