L4
Ideal fault code
Ideal L4: what it means on your model
Engineer only
L4 means different things on different Ideal models. Check the table below against your boiler's model name, which is usually on the front panel or in your user manual.
What you can safely do
There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.
Call a Gas Safe engineer if
- Book a Gas Safe registered engineer.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to: Logic Combi (ESP1), Exclusive 2. Codes can differ between models, so check your manual.