Low Information
PH on Ideal Logic Max Combi

Your boiler is not broken; it is simply in 'Installer Mode' which is used during setup or testing and can be exited by adjusting the control knobs.

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

Installer Mode setting code

What causes this fault?

This occurs because the control knobs on the front of the boiler have been placed into a specific sequence used by engineers to test the system's performance. It is usually triggered accidentally during cleaning or when someone is trying to adjust the temperature settings manually. Because the boiler is waiting for programmed instructions from an installer, it pauses normal heating operation until the mode is deactivated.

DIY fix possible

Turn the DHW (Hot Water) thermostat knob fully clockwise then fully anticlockwise.Turn the CH (Heating) thermostat knob fully clockwise then fully anticlockwise.The display should return to the standard temperature reading.

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