F3Ideal
Ideal F3: fan fault (Ideal Logic)
Checked against Ideal's own documentation: Ideal Heating: what does my boiler fault code mean? and 3 more sources. Last reviewed October 2026. How we check
Check these first, then call an engineer
On Ideal Logic boilers F3 means a fan fault, and Ideal suggests restarting the boiler, which can clear it. On the Exclusive 2, Ideal simply says to contact Ideal or a Gas Safe engineer.
What you can safely do
- Restart or reset the boiler once.
Call a Gas Safe engineer if
- F3 comes back after a restart. The fan needs checking by an engineer.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to Logic Combi (ESP1). Codes can differ between models, so check your manual.