Middleby Marshall **00FF: the touch screen has lost contact with the I/O board
The touch screen on a Middleby Marshall conveyor is only the user interface; the I/O board does the switching of blowers, belts and burners.
Mon–Sat, 8am–8pm
- Controls and display
- Pizza oven thermostat and control repair
- Source: Middleby Marshall
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What **00FF
actually means.
The touch screen on a Middleby Marshall conveyor is only the user interface; the I/O board does the switching of blowers, belts and burners. When the link between them is broken, the PS638 shows **00FF. The X-Series reports the same break in words as I/O COMM LOST.
Middleby Marshall pizza oven display · also shown as I/O COMM LOST
What to do when **00FF shows on the pizza ovenKind of codeControls and display
The controller itself reported trouble, or stopped answering: a display with missing segments, a keypad that no longer takes a press after steam or cleaner got behind it, a board whose relays stick, or saved bake settings that vanish overnight. A full power cycle at the breaker, done as the manual describes, clears a passing glitch; a code that returns, or any sign of moisture or scorching behind the panel, means a board or a keypad, and that is a visit.
Usually leads toPizza oven thermostat and control repair
Thermostats calibrated or replaced, probes, timers, boards and displays repaired, so the pizza oven holds the temperature the cooks set and shows the right number.
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 PS638 electric and gas oven owner's operating and installation manual (74617 Rev G)
PS638 (74617) prints **00FF; X70G, X55G and X55GWB (78866 Rev F) print I/O COMM LOST.
Before you book,
in this order.
Each step comes from Middleby Marshall's own guidance for **00FF on its pizza ovens. Follow it to the end: the last card says whether this is a visit.
Note what the oven is doing, such as whether the belt is still moving and whether it is still hot.
Turn the oven off with its switch.
Book a visit; both manuals send this one straight to service.
Still there?
It usually turns into pizza oven thermostat and control repair. Book with the code and the model number.
What not to do
**00FF is not a temperature or belt message, even though the oven may stop responding to the screen. A blank screen with no power at all is a supply or breaker check, not this code.
What you may
notice with it.
The pizza oven problem **00FF tends to arrive with. Answer these at the pizza oven before anyone is booked.
All problems
Where **00FF usually leads
Pizza oven thermostat and control 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
Controls and display on other makes
In Middleby Marshall's own words
display (user interface) and the I/O
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. PS638 (74617) prints **00FF; X70G, X55G and X55GWB (78866 Rev F) print I/O COMM LOST.
Middleby Marshall **00FF 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 **00FF.
Can I clear **00FF myself?
What does **00FF mean on a Middleby Marshall PS638?
Is I/O COMM LOST on an X55 the same thing?
Will a power cycle fix **00FF?
Back to your everyday
Still showing **00FF?
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.