BoilerFaultCodesIdeal 5A Fault Code
The Ideal 5A fault code means: your boiler’s control panel has been locked manually or due to a button sequence error, preventing you from changing any settings.. It appears on 1 Ideal model in our database.
Technical description: Control panel locked.
What causes the Ideal 5A fault?
This code appears because the child lock or control panel lock has been activated, either intentionally or by mistake. It happens when specific buttons on the front of the boiler are held down for too long, which disables the interface to prevent accidental changes to your heating settings. In rare cases, the code can persist if one of the physical buttons has become stuck in the pressed position.
DIY fix possible
Locate the 'Mode' or 'Reset' buttons on the control panel.Press and hold the 'Mode' button for approximately 5 to 10 seconds.Wait for the display to change or for the '5 A' code to disappear, indicating the panel is unlocked.
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Gas Safe Register →Ideal models that show the 5A fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 5A 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 27 April 2026