--- title: "Frymaster E16: the oil has passed 410°F on the FQ4000" description: "What E16 means on Frymaster E16: the oil has passed 410°F on the FQ4000s, what to check before booking, and when it is not a failure at all." url: "https://commercialappliancerepair.center/error-codes/frymaster-e16/" --- # Frymaster E16: the oil has passed 410°F on the FQ4000 The controller watches its own first high-limit threshold. ## What E16 actually means. The controller watches its own first high-limit threshold. When the frypot oil climbs past 410°F, it logs E16 and sounds the alarm, because the normal thermostat function should never have let the oil get that hot. Oil this hot is close to the point where it degrades fast and becomes a fire risk. Frymaster commercial appliance display · also shown as HIGH LIMIT 1 EXCEEDED, HOT-HI-1, E05 (M3000) What to do when E16 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 logs the same event as E05 HOT HI 1, and the OCF manual shows Hot hi-1. ## Before you book, in this order. Each step comes from Frymaster's own guidance for E16 on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Turn the fryer off at the controller right away and keep staff and baskets away from the vat. 02 Keep the hood suppression system and the Class K extinguisher ready; if smoke turns to flame, use them as your kitchen was trained, never water, and call 911. 03 Let the oil cool in place without draining it hot, and book a visit before the vat is heated again. ### 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 E16 is the controller's own temperature ceiling; E17 is the separate mechanical high-limit switch opening, and E18 means the oil reached 460°F without that switch opening. A plain LOW TEMP or recovery message is the opposite problem: oil that will not come up to heat. ## What you may notice with it. The commercial appliance problems E16 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 E16 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/) [E17](https://commercialappliancerepair.center/error-codes/frymaster-e17/) [E18](https://commercialappliancerepair.center/error-codes/frymaster-e18/) [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 > High limit temperature is past more than [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 logs the same event as E05 HOT HI 1, and the OCF manual shows Hot hi-1. ## Frymaster E16 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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Turn the fryer off at the controller right away and keep staff and baskets away from the vat. If it comes back, it needs a visit. ### What should staff do first when a Frymaster shows HOT-HI-1? Switch the fryer off and step back from the vat. Frymaster wants the fryer shut down at once and serviced; resetting it and carrying on is not an option the manual offers. ### Can oil that triggered E16 on my Frymaster be reused? Overheated oil breaks down quickly, and the manager should judge it by smell, color and smoke point once it has cooled. Many kitchens discard it, but first the fryer itself needs a visit, since the thermostat side of the control let the heat run away. ### Why would a Frymaster overheat oil when the setpoint is normal? The controller keeps calling for heat when it is misreading the oil or when a heat contactor or gas valve is stuck on. Both are checked on the visit, together with the probe position in the frypot. --- **[Read on the site: Frymaster E16: the oil has passed 410°F on the FQ4000](https://commercialappliancerepair.center/error-codes/frymaster-e16/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**