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Worcester Bosch Boiler SE Error Code

Annual service due on Worcester Bosch boilers.

Worcester BoschAll Worcester Bosch boiler codes

SE
May need a pro

SE is a reminder that the annual check is due. The CDi Classic engineer's booklet says it appears once the burner has run 2,324 hours since the last check, and the boiler carries on in a limited way until it's serviced and the reminder is cleared.

Compatible models

Listed in the engineer's service booklet for Greenstar CDi Classic combi, system and regular boilers.

Also shown as

No other codes are listed for this fault.

Difficulty

Try the basic checks, but the usual fix is a technician's job.

Not sure you are reading the code right? See how to read Worcester Bosch boiler codes.

Safety first: never take the casing off a gas boiler. If you smell gas, open windows, don't use light switches, turn the gas off at the meter if you can and call your gas emergency number from outside. A carbon monoxide alarm going off means the same: switch the boiler off, get fresh air and call.

How to fix Worcester Bosch SE

  1. Book the service

    Arrange the yearly service with a Gas Safe engineer.

  2. Keep using the boiler normally

    There's no reset for you to do here; the engineer clears SE in the service menu after the service.

When to call a technician

The service itself and clearing the reminder are engineer jobs.

Frequently asked questions

Which Worcester Bosch models show the SE code?

Listed in the engineer's service booklet for Greenstar CDi Classic combi, system and regular boilers.

Can I fix Worcester Bosch SE myself?

Only the outside checks above. If they don't clear SE, the fix is inside the boiler and needs a Gas Safe registered engineer.

Other Worcester Bosch boiler codes

Last reviewed 2026-10-21. Codes and steps can vary by model; check your owner's manual.

Sources we checked