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A stainless sandwich prep table on a restaurant line, the prep table's lid raised over a row of covered food pans, a probe thermometer standing in one pan, nobody at the table.

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.

(844) 571-4566

Mon–Sat, 8am–8pm

  • Temperature and alarms
  • Reach-in and prep table repair
  • Source: Middleby Marshall

Book a visit

Three short steps, about a minute.

or call (844) 571-4566

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 codeTemperature 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 toReach-in and prep table repair

Reach-ins, pass-throughs, prep tables and blast chillers: gaskets, hinges, fans, thermostats, condensers and compressors.

Shows up asCommercial 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.

MakeMiddleby 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.

SourceMiddleby 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. 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

Before you call

Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display

All 8 causes, cheapest first

It also comes with

Close view of the dark touch control panel on the front of a stainless combi oven in a commercial kitchen, one abstract amber warning indicator glowing among unlit icons, the steam-fogged glass door blurred beside it. 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

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

More Middleby Marshall codes

IO_COMM_LOSTMC1_COMM_LOSTMC2_COMM_LOSTPROBE_TL_FAULTFAN_HIGH_CURRENTFAN LOW CURRENTMC1_HIGH_CURRENTLIMIT BOARD HIGH TEMPLIMIT BOARD PROBE FAULTIO BOARD HIGH TEMPCONTROL COMPARTMENT HIGH TEMPHIGH TEMP CHECK FANS
All 14 Middleby Marshall codes

Temperature and alarms on other makes

Alto-Shaam E13Beverage-Air HiBlodgett Cavity High Temp ErrorCleveland RESET lightContinental Refrigerator HIDelfield HiFrymaster E16Garland E04
All 68 codes of this kind
A working restaurant cooking line under a stainless ventilation hood, two stainless gas fryers with baskets hanging above the oil, a flat griddle and a combi oven with a glass door beside them, the equipment clearly the subject, a cook seen only from behind and shoulders down at the far end of the line, warm kitchen light, small blue flames visible under the griddle. 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) Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F) Middleby Marshall LongWave LW26 and LW33 infrared conveyor oven owner's manual (Rev F)

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.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A restaurant team working a busy commercial kitchen line.
For the heart of your home.

Questions
about HIGH LIMIT TRIPPED.

Can I clear HIGH LIMIT TRIPPED myself?
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.

Back to your everyday

Still showing HIGH LIMIT TRIPPED?

A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.

Schedule a repair Call (844) 571-4566
(844) 571-4566 Schedule a repair