Verified boiler fault code

Worcester Bosch SE Fault Code (Greenstar FS CDi ErP Regular)

Service required.

Safety disclaimer

Boiler repair help from Aza & Sons Services

Fault code summary

Manufacturer: Worcester Bosch
Fault code: SE
Fault type: Other manufacturer-specific faults
Severity: Not specified
Reset: Not specified
Applicable models: Greenstar FS 30CDi ErP Regular, Greenstar FS 42CDi ErP Regular

Quick answer

Service required.

What does this fault code mean?

Service required.

Common causes

The appliance indicates that service is required.

Symptoms

This information was not provided in the verified manufacturer source.

What can the homeowner safely check?

This information was not provided in the verified manufacturer source.

Boiler reset information

Reset information was not provided in the verified manufacturer source. Do not repeatedly reset an unresolved fault.

When should I call an engineer?

Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.

Engineer diagnosis

Arrange service in accordance with the manufacturer's instructions.

Applicable boiler models

Related fault codes

Manufacturer documentation

Greenstar FS 30CDi & 42CDi ErP Regular user instructions

SE | Service required

Last verified

2026-09-12

Frequently asked questions

What does Worcester Bosch SE mean?

Service required.