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BoilerCodes
SEIdeal

Ideal SE: service interval timer

Checked against Ideal's own documentation: Ideal Heating: what does my boiler fault code mean? (page 2). Last reviewed October 2026. How we check

Check these first, then call an engineer

Ideal's general fault code guide describes SE as: service interval timer. It is a reminder that the boiler is due a service, not a breakdown.

What you can safely do

  1. Arrange a service with your installer, as Ideal advises.

Call a Gas Safe engineer if

  • The boiler has also stopped working: book a Gas Safe registered engineer.
Find a Gas Safe engineer near you Opens the official Gas Safe Register search.

Applies to Ideal boilers (Ideal's general fault code guide). Codes can differ between models, so check your manual.

What SE means on each Ideal model

From Ideal's own fault tables. Your model name is usually on the front of the boiler or in the user manual.

ModelMeaning
Ideal boilers (Ideal's general fault code guide)Service interval timer

Common questions about Ideal SE

Can I fix Ideal SE myself?

Only the checks listed above. If they don't clear it, it needs a Gas Safe registered engineer.

Nearby Ideal codes

See all 23 Ideal codes

Sources

Last reviewed October 2026. Spotted something that doesn't match your manual? Email hello@boilercodes.co.uk and we'll check it. How we check