BoilerFaultCodesIdeal 11.7 Fault Code
Also written as 117 — same fault.
The Ideal 11.7 fault code means: your boiler is failing to light because it is not detecting the necessary water pressure, which is preventing the system from starting safely.. It appears on 1 Ideal model in our database.
Technical description: 11.7
DIY fix possible
Locate the external filling loop or the integrated key underneath the boiler casing.Slowly open the valve to allow water into the system until the pressure gauge reads between 1 and 1.5 bar.Close the valve tightly and restart the boiler.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like 11.7: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Ideal models that show the 11.7 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 11.7 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