Low Information
5A on Ideal Maximiser SE

Your boiler’s control panel has been locked manually or due to a button sequence error, preventing you from changing any settings.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Control panel locked.

What causes this 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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