Middleby Marshall Appliance Repair

What we repair on Middleby Marshall conveyor ovens

We repair Middleby Marshall conveyor ovens, gas and electric. That covers the WOW! PS series impingement ovens such as the PS640, PS638 and PS360, the infrared conveyor line, X-Series units and countertop conveyors. Single, double and triple stacks are all in scope. We fix belts, drive motors, burners, blowers and controls.

These ovens are built in Elgin, Illinois. So our Chicago techs see a lot of them. Most of the work is on busy pizza lines where every deck runs from open to close.

Why a conveyor oven stops baking right

An impingement oven blows hot air through rows of metal fingers above and below the belt. The air strips away the cool layer around the food. That is why it bakes so fast. When one part of that air path fails, the bake goes wrong in a way you can see on the pie.

• Pale tops or doughy centers. The blower motor, the fan that feeds air to the fingers, may be weak. Clogged finger plates cause the same result.
• Belt stops or creeps. We check the conveyor drive motor, the speed control board and belt tension. A stretched belt can slip on its sprocket.
• No heat on a gas deck. The burner may not light. We test the igniter, the flame sensor and the gas valve in that order.
• Oven quits mid-shift. An overheated control box can trip a safety. A dusty cooling fan behind the panel is a usual suspect.
• Uneven bake side to side. Fingers put back in the wrong slots change the airflow. We check the layout against the manual.

The WOW! ovens also drop into an idle mode when the belt runs empty. It saves gas. Some crews think it is a fault. It is normal, and we can show your team how it works.

Some PS ovens use a hearth bake belt. The pizza sits right on a tight mesh belt and picks up heat from below, like a deck oven. When those pies start coming out with soft bottoms, we look at the lower fingers and the belt itself before anything else.

How a service call works for a pizza kitchen

Call early in the day if you can. We get to most shops on the day they phone. A morning call gives us room to get you baking before the dinner rush.

The tech runs the oven and watches it bake. Then you get a fixed price. Nothing starts until you say yes. The commercial diagnostic runs $149 and drops off the bill once you approve the work. We install genuine OEM parts, and our repair warranty backs the job. If a motor or board has to ship in, the return visit goes on the books before the tech pulls away. Each tech carries a license and insurance and has cleared a background check.

Should you repair or replace a Middleby Marshall oven?

Most of the time, repair it. These ovens are heavy steel boxes. The parts that wear out are motors, belts, igniters and boards, and those are made to be swapped. A new stack costs far more than a blower motor.

Replacing starts to make sense when the cavity is rusted through. It also makes sense when you need a wider belt for more volume. We will say so plainly if a repair is a bad bet. On a triple stack, one bad deck almost never means the other two are done.

Small habits that keep the belt moving

Pull and clean the finger plates on the schedule in your manual. Keep the air intake and control vents clear of flour and boxes. Listen for a belt that jerks or a new squeal. Those signs often show up a week before a breakdown.

We handle the rest of your line too. That includes the prep coolers and reach-ins beside the oven and the ranges on the hot side. You can also read about our general commercial oven repair work.

Middleby Marshall service near you

We work on pizza ovens across the Chicago area, in Houston, in Los Angeles and Pasadena, in Northern Virginia and in Washington D.C.