Low Service
SE on Worcester Bosch Greenstar CDi Compact

Your boiler is simply displaying a reminder that its annual service is due soon or is now overdue.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Service interval expired

What causes this fault?

This code appears because a service timer has been programmed into the boiler's internal computer by a previous engineer. It is triggered once a set period of time—usually twelve months—has passed since the last professional maintenance visit. It is not a hardware failure, but rather an automated prompt to ensure the appliance remains safe and efficient.

This code often appears in autumn as homeowners turn their heating back on and realise a year has passed since their last pre-winter check.

Engineer required

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

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