Middleby Marshall CONTROL OVERTEMP: the control compartment is too hot
The PS638 lists CONTROL OVERTEMP beside CLEAN FILTERS and gives stopped cooling fans as its cause.
Mon–Sat, 8am–8pm
- Blowers and airflow
- Pizza oven blower and fan repair
- Source: Middleby Marshall
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What CONTROL OVERTEMP
actually means.
The PS638 lists CONTROL OVERTEMP beside CLEAN FILTERS and gives stopped cooling fans as its cause. The PS640 gas manual ties Control Over Temp to clogged front filters. Either way, the electronics are not getting enough cool air.
Middleby Marshall pizza oven display · also shown as CONTROL OVERTEMP., Control Over Temp
What to do when CONTROL OVERTEMP shows on the pizza ovenKind of codeBlowers and airflow
The air the oven bakes with is not moving as it should. In a conveyor or rapid-cook oven the impingement blower may be dragging on worn bearings, its fingers packed with grease so the jets fire unevenly, or its cooling fan clogged with flour dust until the controls overheat; a gas oven may also refuse to light when its combustion air switch never proves. Cleaning the intake filters and grilles with the oven off is safe; a blower that slows, squeals or smells hot is a visit.
Usually leads toPizza oven blower and fan repair
Impingement blowers, cooling fans, bearings, belts and air fingers repaired or replaced, so hot air reaches every lane of the pizza oven evenly.
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 CONTROL OVERTEMP with stopped cooling fans as the cause; PS640 gas (60251 Rev J) prints Control Over Temp with clogged front filters.
Before you book,
in this order.
Each step comes from Middleby Marshall's own guidance for CONTROL OVERTEMP on its pizza ovens. Follow it to the end: the last card says whether this is a visit.
Clean or replace the cooling fan filters first.
Clear anything stacked against the control side of the oven.
With the oven running, listen and feel for air at the cooling fan grilles; if there is none, book a visit to repair the fans.
Still there?
It usually turns into pizza oven blower and fan repair. Book with the code and the model number.
What not to do
CONTROL OVERTEMP is not a sign that the baking chamber is too hot. It is also not a burner or thermocouple message, so it does not explain uneven bakes on its own.
What you may
notice with it.
The pizza oven problems CONTROL OVERTEMP tends to arrive with. Answer these at the pizza oven before anyone is booked.
All problems
Where CONTROL OVERTEMP usually leads
Pizza oven blower and fan 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
Blowers and airflow on other makes
All 3 codes of this kind
In Middleby Marshall's own words
Cooling Fans are not working
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. PS638 (74617) prints CONTROL OVERTEMP with stopped cooling fans as the cause; PS640 gas (60251 Rev J) prints Control Over Temp with clogged front filters.
Middleby Marshall CONTROL OVERTEMP 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 CONTROL OVERTEMP.
Can I clear CONTROL OVERTEMP myself?
Is CONTROL OVERTEMP worse than CLEAN FILTERS?
Can a hot kitchen cause CONTROL OVERTEMP?
Should I keep the oven running with CONTROL OVERTEMP?
Back to your everyday
Still showing CONTROL OVERTEMP?
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.