Low
0 / A on Ideal Maximiser SE

Your boiler is perfectly fine, it has simply paused for a few minutes to protect itself from turning on and off too frequently.

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.

What the manual says

Manufacturer manual

Unit in anti fast-cycle time.

From this model's manual
Verified against the Ideal Maximiser Se installation & service manual, page 31.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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Avoid the next call-out bill

A cover plan would handle faults like 0 / A: no call-out fees, no surprise bills.

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