

Middleby Marshall Combustion Blower problem: the burner's air supply is in question
The PS640 gas oven has two kinds of blower: the main blowers that bake and a burner blower that supplies combustion air.
Mon–Sat, 8am–8pm
- Ignition and flame
- Pizza oven burner and igniter repair
- Source: Middleby Marshall
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What Combustion Blower problem
actually means.
The PS640 gas oven has two kinds of blower: the main blowers that bake and a burner blower that supplies combustion air. The screen alert shows Main Blower problem or Combustion Blower problem, and for either the manual says the computer has detected a blower issue that a qualified technician should correct.
Middleby Marshall pizza oven display
What to do when Combustion Blower problem shows on the pizza ovenKind of codeIgnition and flame
The oven tried to light its burner and never proved a flame, or proved one and then lost it. The usual reasons are ordinary: a gas shutoff not fully open or a tank running dry, an igniter cracked or crusted with flour dust, a flame sensor or thermocouple that no longer reads the heat, or a draft that pulls the pilot away from it. Checking the shutoff and the tank and running the restart the manual names are fair first steps; if you smell gas, get outside first, and the valve, the sensor and every fitting stay with a technician.
Usually leads toPizza oven burner and igniter repair
Pizza oven burners cleared or replaced and igniters fitted and gapped, so the flame lights first time and burns blue and steady under the stone.
Shows up asPizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display
A pizza oven error code shows as letters or numbers on the display of a conveyor, deck or rapid-cook oven, a flashing light on its panel, or a message about ignition, heat, belt or airflow.
MakeMiddleby Marshall
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.
SourceMiddleby Marshall PS640 series gas oven owner's operating and installation manual (60251 Rev J)
PS640 series gas ovens (owner's operating and installation manual 60251 Rev J), Screen Alerts table.
Before you book,
in this order.
Each step comes from Middleby Marshall's own guidance for Combustion Blower problem on its pizza ovens. Follow it to the end: the last card says whether this is a visit.
Turn the oven off; a burner that cannot get proper air should not keep running.
Keep the area around the oven's air openings clear and do not remove any panels.
Book a visit; if you notice a gas smell at any point, close the gas supply, leave and call the gas utility from outside.
Still there?
It usually turns into pizza oven burner and igniter repair. Book with the code and the model number.
What not to do
This alert is not about the main baking air; that version reads Main Blower problem. It is also different from RESET IGNITION on the X-Series, which reports the flame itself.
What you may
notice with it.
The pizza oven problems Combustion Blower problem tends to arrive with. Answer these at the pizza oven before anyone is booked.
All problemsWhere Combustion Blower problem usually leads
Pizza oven burner and igniter repair.
Middleby Marshall
pizza ovens.
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 oven repairMore Middleby Marshall codes
Ignition and flame on other makes
In Middleby Marshall's own words
either the main, or burner
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. PS640 series gas ovens (owner's operating and installation manual 60251 Rev J), Screen Alerts table.
Middleby Marshall Combustion Blower problem pizza oven 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 areasTampa BayFL · 31 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
Questions
about Combustion Blower problem.
Can I clear Combustion Blower problem myself?
What is the combustion blower on a Middleby Marshall PS640?
Can I restart my PS640 after a Combustion Blower problem alert?
Could a combustion blower issue cause a gas smell?
Back to your everyday
Still showing Combustion Blower problem?
A booking with a code goes further when it has the code copied as shown, the model and serial from the rating plate, and a note on whether the oven still lights, heats or moves its belt. With those three, the office can match the likely part to your oven the same day.