BoilerFaultCodesIdeal 22.8 Fault Code
Also written as 228 — same fault.
The Ideal 22.8 fault code means: your boiler has identified that the internal water pressure is too low to operate safely, preventing it from heating your home or water.. It appears on 1 Ideal model in our database.
Technical description: 22.8
DIY fix possible
Locate the external filling loop, usually a small braided metal hose with one or two valves located underneath the boiler.Open the valve(s) slowly to allow water into the system while watching the pressure gauge on the front panel.Stop filling once the needle reaches the green zone, typically between 1.0 and 1.5 bar, then ensure the valves are tightly closed.
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Ideal models that show the 22.8 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 22.8 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