Low
270 on Worcester Bosch Greenstar 2000

Your boiler is currently booting up, which is a normal process while it checks its systems before starting to heat your home.

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.

What the manual says

Manufacturer manual

Starting up boiler

From this model's manual
Verified against the Worcester Bosch Greenstar 27cdi installation & service manual, page 82.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Wait 2-5 minutes for the boiler to complete its start-up sequenceIf the code does not clear, switch the boiler off at the fused spurWait 30 seconds and switch it back on to force a re-start

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

Monthly cover means no unexpected bills when your boiler breaks down.

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 guides you might find useful