--- title: "Middleby Marshall Pizza Oven Repair | PizzaOvenRepair.center" description: "Middleby Marshall pizza oven repair. A Middleby Marshall conveyor call is about the line: how many pies came out right before the belt slowed, stalled or the…" url: "https://pizzaovenrepair.center/brands/middleby-marshall/" --- # Middleby Marshall Pizza Oven Repair A Middleby Marshall conveyor call is about the line: how many pies came out right before the belt slowed, stalled or the crust went pale. ## Middleby Marshall pizza ovens, specifically. Middleby Marshall, based in Elgin, Illinois, sells conveyor ovens and only conveyor ovens: the PS-series impingement ovens, the X-Series, the countertop X20 and X26, and infrared models. Most PS and X ovens come in gas or electric and stack up to three high, so the fuel, the model and which oven in the stack is acting up shape the whole visit. The Middleby Marshall lineup ### Builds 1 pizza oven type Conveyor and rapid-cook pizza oven ### Called out for Gas Pizza Oven Won't Light: Clicks, Gas Hiss, Still No Flame and 5 more problems on Middleby Marshall ### Repairs we do 10 repairs, on any make Pizza oven diagnostic visit · Pizza oven burner and igniter repair · Pizza oven gas valve and thermocouple repair · Pizza oven floor and dome repair ### Error codes RESET IGNITION · HEATING ERROR · PROBE # OPEN · HIGH TEMP ERROR · FRONT BELT JAMMED 16 Middleby Marshall codes with a page of their own ## The Middleby Marshall lineup. Middleby Marshall builds 1 of the 4 pizza oven types this site covers. Which one decides how the visit is planned. [All pizza oven types](https://pizzaovenrepair.center/types/) Conveyor ### Conveyor and rapid-cook pizza oven **5** of the problems we see on Middleby Marshall come up on it Conveyor and rapid-cook pizza oven repair ## What is particular to Middleby Marshall. The PS-series (PS520, PS540, PS638, PS640, PS3240) are the classic impingement conveyors; the X-Series (X55, X55GWB) and the countertop X20 and X26 are newer; the DZ and LongWave models are infrared. Gas and electric versions use different parts, and stacked ovens are serviced one deck at a time. ### A gas ignition with a set rhythm A PS638 gas oven runs its main blower for 15 seconds, holds the burner at full valve for 60 seconds to light, then drops to a low flame for 80 seconds to clean the flame sensor before ramping up. If the flame is lost, it tries three spark and purge cycles before locking out, so a slow start is not always a problem. ### Air fingers that must go back in order Hot air reaches the pizza through removable fingers above and below the belt. The PS640 manual warns that fingers reassembled incorrectly after cleaning change the bake, and traces little or no air from the fingers to that reassembly. ### A photo eye and energy modes The PS638 can use a photo eye at the loading end to raise the blowers only when product goes in, and the PS640 steps down through energy modes when the belt is empty. A belt that stops or blowers that go quiet between orders are often these modes at work. ### Split belts with their own drives Dual-belt ovens show two bake times and report the front and rear belts separately, so one lane can stop while the other keeps baking. The X-Series goes further and runs each belt from its own drive board and breaker. Parts Middleby Marshall publishes parts lists that include the ignition module, the modulating gas valve, conveyor drive motors, control boards and digital displays. The model and serial plate decide which version applies,. Repair or replace A conveyor built like these is designed to be rebuilt, and blowers, belts, motors, ignition parts and probes are routine repairs. When a very old oven needs its controls, gas train and belt drive all at once, it is worth weighing that against a current model. Book your Middleby Marshall visit ## What we are called out for. On Middleby Marshall, most often gas pizza oven won't light: clicks, gas hiss, still no flame. [All problems](https://pizzaovenrepair.center/problems/) Middleby Marshall error codes - [`RESET IGNITION` Ignition and flame](https://pizzaovenrepair.center/error-codes/middleby-marshall-reset-ignition/) - [`HEATING ERROR` Elements and heating](https://pizzaovenrepair.center/error-codes/middleby-marshall-heating-error/) - [`PROBE # OPEN` Temperature and sensors](https://pizzaovenrepair.center/error-codes/middleby-marshall-probe-open/) - [`HIGH TEMP ERROR` Temperature and sensors](https://pizzaovenrepair.center/error-codes/middleby-marshall-high-temp-error/) - [`FRONT BELT JAMMED` Conveyor belt and drive](https://pizzaovenrepair.center/error-codes/middleby-marshall-front-belt-jammed/) - [`REAR BELT JAMMED` Conveyor belt and drive](https://pizzaovenrepair.center/error-codes/middleby-marshall-rear-belt-jammed/) [All Middleby Marshall codes](https://pizzaovenrepair.center/error-codes/#codes-middleby-marshall) ### Gas Pizza Oven Won't Light: Clicks, Gas Hiss, Still No Flame 7 causes, cheapest first ### Pizza Oven Not Getting Hot Enough to Bake a Crisp Crust 7 causes, cheapest first ### Conveyor Oven Belt Not Moving or Stopping Mid-Bake 6 causes, cheapest first ### Conveyor Oven Uneven Bake Across the Belt or From End to End 6 causes, cheapest first ## Not a Middleby Marshall? Middleby Marshall is one of 16 pizza oven makes on this site. The other 15 each have a page of their own. [All 16 brands](https://pizzaovenrepair.center/brands/) ## Middleby Marshall pizza oven repair, where we come out. 9 metros, each with its own page. 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The conveyor stays still until the oven reaches its set points. If the screen shows the belt off while warming, wait; if the oven is hot and the belt still will not run, look for a jam with the oven off and cool. ### My Middleby Marshall bakes differently since we cleaned it. Why? The air fingers were probably put back in a different order. Middleby Marshall warns that incorrect reassembly changes the bake, so check them against the finger layout from your manual. ### How long does a Middleby Marshall gas conveyor take to light? On a PS638 the ignition sequence alone takes over two and a half minutes: a 15-second purge, 60 seconds lighting and 80 seconds at low flame before full power. That is normal. ### Do you work on stacked Middleby Marshall ovens? Yes. Double and triple stacks are serviced one oven at a time, so tell us which position is misbehaving when you book. --- **[Read on the site: Middleby Marshall Pizza Oven Repair | PizzaOvenRepair.center](https://pizzaovenrepair.center/brands/middleby-marshall/)** **[Book a visit with PizzaOvenRepair.center](https://pizzaovenrepair.center/schedule/)**