Riello RDB burner reset: the light on the control box explained
Riello RDB burners, fitted across many oil boiler brands rather than one specific make, use a small illuminated button on the control box to show a lockout. Pressing it restarts the burner once; the pattern of what happens next is diagnostically useful.
Where the Riello RDB lockout light usually comes from
If the burner attempts ignition again and runs normally, the initial lockout may have been a passing nuisance trip, though it is still worth mentioning at the next service. If it locks out again immediately in the same way, the fault is repeatable and needs proper diagnosis covering the nozzle, electrodes, oil supply and photocell before a third attempt is made, since three or more resets is well beyond the safe limit.
Published business details
- Based at 24 Bristol Road, Radstock, BA3 3EE
- Telephone enquiries: 07516 118198
- Opening hours: Monday to Friday, 8:30am to 5:00pm
The Riello RDB lockout light: engineer's shortlist
- The illuminated button both signals and resets the lockout
- A single successful restart may still be worth noting at service
- An immediate repeat lockout confirms a genuine, repeatable fault
- Nozzle, electrodes, supply and photocell are the standard checklist
- Two attempts is the safe limit regardless of what the light shows
Questions we get asked
- Is the RDB burner specific to one boiler brand?
- No — it is a widely used burner fitted across several oil boiler manufacturers, so the same reset logic applies broadly.
- Can I diagnose further myself after resetting?
- Beyond pressing the reset once, further investigation involves opening the burner and is OFTEC-registered work.
Related help pages
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- ElectronicsBoiler PCB failure: when the circuit board really is the problem
- Fault differentiationIdeal L2: why the same code means different repairs
- Record keepingKeeping track of when your boiler was last serviced
- Property typeReplacing solid fuel back boilers with modern heating
Services that cover this
Where we deal with this
Get the Riello RDB lockout light looked at properly
Where this leaves you: One reset tells you whether the fault is passing or repeatable — beyond that, book an OFTEC engineer rather than guessing further.
Published opening hours are Monday to Friday, 8:30am to 5:00pm.
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