Boiler on Low

Ideal Boiler on Fault Code

Also written as BOILERON — same fault.

The Ideal Boiler on fault code means: your boiler is working normally and the light simply indicates it is switched on and firing.. It appears on 2 Ideal models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Neon indicating boiler status: Boiler is operational

What causes the Ideal Boiler on fault?

This indicator is not a fault, but rather a confirmation that the boiler's internal controls have successfully received a demand for heat and the burner is currently firing. It shows that the electrical circuit is complete and the gas valve is open, allowing the unit to heat your water or radiators. You will see this light whenever the system is operating as intended.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ideal models that show the Boiler on fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal Boiler on fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026