Rational Service 29: the control board is running too hot
The iCombi Pro's electronics sit behind the side panel and are cooled by filtered air.
Mon–Sat, 8am–8pm
- Controls and power
- Commercial controls and board repair
- Source: Rational
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Three short steps, about a minute.
or call (844) 571-4566
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What Service 29
actually means.
The iCombi Pro's electronics sit behind the side panel and are cooled by filtered air. Service 29 reports that the board itself is too hot. Rational lists cooking as not possible until the cause is dealt with.
Rational commercial appliance display · also shown as 29
What to do when Service 29 shows on the commercial applianceKind of codeControls and power
The controller itself is reporting trouble, or the supply behind it is: a display with dead segments, a keypad that stopped responding after steam or degreaser got behind it, relays that stick, stored recipes or cycles that vanished overnight, a blown control fuse, or one leg of a three-phase feed missing so half the heat or the pump is gone. A full power cycle at the breaker, done as the manual describes, clears a passing glitch; a code that returns, a scorched smell or any sign of moisture behind the panel means the breaker stays off, and that is a visit.
Usually leads toCommercial controls and board repair
Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so.
Shows up asCommercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display
A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone.
MakeRational
A Rational visit is timed after the evening cleaning cycle, when the cabinet is cool and the display can be read without a load inside.
SourceRATIONAL iCombi Pro floor units 20-1/1 and 20-2/1, original instructions for use (US English)
Listed in the error message tables of the iCombi Pro floor unit instructions for use (models 20-1/1 and 20-2/1, US English edition).
Before you book,
in this order.
Each step comes from Rational's own guidance for Service 29 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Check that nothing hot is standing right next to the oven or blowing onto its control side, such as a fryer or a broiler.
Look at the air filter on the unit; Rational describes cleaning it as daily care and replacing it as a service task.
Let the oven cool and switch it on again; if Service 29 returns, book a visit.
Still there?
It usually turns into commercial controls and board repair. Book with the code and the model number.
What not to do
Service 29 is not about the cooking cabinet getting too hot; that is Service 28.2. It also says nothing about the food, only about the electronics compartment.
What you may
notice with it.
The commercial appliance problems Service 29 tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where Service 29 usually leads
Commercial controls and board repair.
Rational
commercial appliances.
A Rational visit is timed after the evening cleaning cycle, when the cabinet is cool and the display can be read without a load inside.
Rational commercial appliance repairMore Rational codes
Controls and power on other makes
In Rational's own words
The board temperature is too high.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the error message tables of the iCombi Pro floor unit instructions for use (models 20-1/1 and 20-2/1, US English edition).
Rational Service 29 commercial appliance 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 Service 29.
Can I clear Service 29 myself?
Why does my Rational show Service 29 in a hot kitchen?
Does a dirty air filter cause Service 29 on a Rational?
Can I cook through Service 29 on a Rational combi?
Back to your everyday
Still showing Service 29?
A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.