BoilerFaultCodesIdeal F 01 Fault Code
Also written as F01 — same fault.
The Ideal F 01 fault code means: your boiler has detected that there is not enough water in the system to operate safely, causing it to shut down temporarily.. It appears on 4 Ideal models in our database.
Technical description: Low Water Pressure
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the small tap(s) on the filling loop to allow water into the system.Watch the pressure gauge and close the taps once it reaches 1.5 bar, then restart the boiler.
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Ideal models that show the F 01 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal F 01 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
- Ideal i-mini2 C24 manual (PDF)
- Ideal Independent System2 S15 manual (PDF)
- Ideal Logic Max Combi 2 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026