No flame (AL10)
Dirty electrode or flame sensor, insufficient gas, condensate that no longer drains.
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Riello Error Codes
Does your Riello boiler (Residence Condens, Family Condens, Start Condens…) show "AL" followed by a number? That number identifies the fault: AL10 for the flame, AL20 for overheating, AL40 for pressure. Our heating engineers work 7 days a week on Riello gas boilers and on Riello oil burners, with the price given first.
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Riello boiler repair
Every heating engineer knows Riello for its oil burners, fitted to many floor-standing boilers. The brand also makes wall-hung condensing gas boilers such as the Residence Condens and the Family Condens, which display their faults as AL followed by two digits.
An AL10 means the ignition attempts have run out without a flame. An AL20 tells you the limit thermostat has tripped. An AL40 or AL41 reports water pressure that is too low. On an oil burner, it is a lockout lamp on the control box that lights up instead.
Our engineer tests the ignition, the flame sensor, the temperature sensors, the pressure and the fuel supply. He tells you what he found and the price of the repair before doing it.
Servicing a Riello boiler or burner
A well-maintained Riello oil burner runs for years: new nozzle, clean filter, correctly set electrodes and a clean photocell. Without servicing, it goes into lockout more and more often.
On a Riello wall-hung gas boiler, the service includes cleaning the exchanger and the burner, checking the condensate trap and a combustion analysis. You receive the service attestation.
The technician also notes the last faults displayed: a repeated AL10 or an AL40 that returns every month are signs to deal with before winter.
Riello error code table (wall-hung gas boilers)
These codes apply to recent Riello wall-hung boilers with an "AL" display. Riello oil burners have no screen: their control box lights up red. In both cases, note what you see and call us.
| Code | Meaning | What the technician checks |
|---|---|---|
| AL10 | Ignition attempts used up: no flame (or blocking caused by condensate) | Gas supply, electrode, condensate drain. |
| AL11 | Parasitic flame: a flame is detected when there should be none | Electrode, circuit board. |
| AL20 | Limit thermostat tripped (overheating) | Water circulation, circulating pump, flow sensor. |
| AL40 | Water pressure too low for several minutes: blocking | System pressure, leak, expansion vessel. |
| AL41 | Water pressure too low: shutdown | Pressure, pressure sensor. |
| AL42 | Water pressure sensor fault | Pressure sensor and wiring. |
| AL60 | Domestic hot water sensor fault | Hot water sensor: the boiler heats but hot water is unstable. |
| AL71 | Flow sensor fault (open or short circuit) | Flow sensor and wiring. |
Code not in this table: call us, our technician knows it.
Smell of gas? Do not touch any switch, open the windows, leave the house and call 112 from outside. If an oil burner is in lockout, leave it as it is and call us: the technician looks at the nozzle, the filter and the photocell.
Typical Riello faults
Pressure (AL40, AL41, AL42)
Leak in the system, faulty expansion vessel or pressure sensor.
Overheating (AL20)
Seized pump or clogged circuit: the water no longer circulates enough.
Oil burner in lockout
Worn nozzle, blocked filter, oil pump or dirty photocell.
Sensors (AL60, AL71)
A failing sensor upsets the heating or the hot water.
What the technician does on your Riello
He identifies the appliance
Wall-hung gas boiler or oil burner: the checks are not the same.
He measures
Ionisation, gas or oil pressure, sensors, combustion with the analyser.
He repairs and adjusts
Price announced first, repair, combustion setting, job report and invoice.
What our customers say
Where do we work?
We repair Riello boilers and burners throughout Belgium, in Brussels, Wallonia and Flanders. Call us with your code and your town for the earliest visit.
BrusselsWalloon BrabantFlemish BrabantHainautNamurLiègeLuxembourg provinceAntwerpEast FlandersWest FlandersLimburg
The brands we work with
Our technicians work on all brands: they install, service and repair appliances from the major manufacturers. For a new installation, we recommend the model that suits your home and budget.
We buy our equipment from all the major Belgian wholesalers and suppliers, including Facq, Van Marcke and Desco: genuine parts, quickly available.
Frequently asked questions
What does AL10 mean on a Riello boiler?
The ignition attempts ran out without a flame. Gas, the electrode or a blocked condensate drain can be the cause: note the code and call us.
Is code AL40 serious?
The water pressure stayed too low, so the boiler blocks to protect itself. If it keeps returning, a leak or the expansion vessel must be checked.
What does AL20 mean?
The limit thermostat has tripped: the boiler got too hot. The cause, circulation or a sensor, has to be found.
My Riello oil burner has a red lamp lit: what should I do?
It is in lockout. Note since when and call us: the cause (nozzle, filter, photocell) has to be found rather than restarting it several times.
Do you repair Riello burners fitted to other boilers?
Yes, Riello oil and gas burners, whatever the make of the boiler.
When can you come?
We offer the first available slot, often the same day depending on your town, with the price announced before the work.
Your Riello shows a code?
Call us or choose a time online: a heating engineer comes to your home and finds the cause.