Emergency
276 on Worcester Bosch Greenstar 25Si Compact ErP

Your boiler has temporarily stopped working because the water inside it has become dangerously hot.

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

Flow temperature exceeds 95°C

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar Si Compact Erp 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.

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like 276: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related fault codes

All 52 fault codes on the Greenstar 25Si Compact ErP

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

Related guides you might find useful