0 / A Low

Ideal 0 / A Fault Code

Also written as 0A — same fault.

The Ideal 0 / A fault code means: your boiler is perfectly fine, it has simply paused for a few minutes to protect itself from turning on and off too frequently.. 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: Unit in anti fast-cycle time.

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 0 / A fault code

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

Source

Ideal 0 / A 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