Emergency
E9 on Worcester Bosch Greenstar 30

Your boiler has detected that it is getting dangerously hot and has shut itself down to prevent damage, or it is struggling to safely push exhaust gases outside.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Heat exchanger temperature limiter or flue gas temperature limiter has tripped. or Flue pipe is blocked.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 24 Rsf installation & service manual.
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 is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

EAView →E2View →

All 18 fault codes on the Greenstar 30

Seeing a different code? Every code this model can display, in one place.

A7A8Adb1b2b3C6CCd3d5E2EAF0F1F7FAFd

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