bxx Low

Ideal bxx Fault Code

Also written as BXX — same fault.

The Ideal bxx fault code means: your boiler has paused its normal operation to protect itself while it monitors a temporary internal condition, and it will likely restart automatically once the situation resolves.. It appears on 1 Ideal model in our database.

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: Blocking code. Refer to page 52 for Blocking Code references.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ideal models that show the bxx fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal bxx 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