Ideal · Logic System2
L09 boiler fault code
Logic System2
Get a Gas Safe engineer
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Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
What L09 means
L09 indicates unconfigured pcb.
Safe check
There is no homeowner adjustment for this message. Record the code and do not open the boiler or inspect its electrical parts.
When to contact an engineer
The fault remains or returns after the user guide action; contact Ideal if the boiler is under warranty or arrange a Gas Safe registered engineer.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- Logic System2 User Guide · §1.9, printed p. 7 · L09 Unconfigured PCB
user guide
10/2023 · UIN 237665 A01