BoilerFaultCodesIdeal 2 / F Fault Code
Also written as 2F — same fault.
The Ideal 2 / F fault code means: your boiler is struggling because there isn't enough water pressure inside the system to operate safely.. It appears on 1 Ideal model in our database.
Technical description: This code can appear if the unit adjusts itself to the small amount of water in the installation.
DIY fix possible
Locate the filling loop, which is usually a silver braided hose under the boiler.Open the valves on the filling loop to allow water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches between 1.0 and 1.5 bar.Close the valves tightly to stop the flow of water.
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Ideal models that show the 2 / F fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 2 / F fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026