Boilers 6 min read Updated 30 June 2026 Trade verified
Ideal Boiler Fault Codes — Complete UK Guide
Ideal Logic and Vogue combis show F- and L-prefixed codes. Manufactured in Hull, parts are widely available and most faults are DIY-diagnosable. Here is the UK trade reference.
Need parts for this job?
Trade-priced Ideal boiler in the Plumber.Parts catalog — next-day delivery.
Step-by-step method
F1 — Low water pressure
Below 0.5 bar. Top up via the built-in filling key to 1.2 bar.
F2 — Flame loss
Same family as Worcester EA. Check gas, condensate (winter freeze), electrodes. Reset once.
L2 — Ignition lockout
Three ignition attempts failed. Same causes as F2. Repeat lockouts = engineer.
C6 — Fan fault
Fan speed out of range. Blocked flue or failed fan. Never bypass.
Frequently asked questions
How do I reset an Ideal Logic boiler?+
Press and hold the reset button (marked with a curved arrow) for 3 seconds.
Is Ideal Logic a good boiler?+
Best value UK combi. 10-year warranty, made in Hull, cheap parts. Slightly noisier than Worcester or Vaillant.