Medium
H.03.02 on Baxi 600 Combi 2

Your boiler's burner has unexpectedly gone out while running, causing the system to restart or stop to ensure safety.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Temporary flame loss

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
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

Check that your gas pre-pay meter has credit (if applicable)Check that other gas appliances in your home are working correctlyPress the Reset button for five secondsEnsure the external condensate pipe is not frozen if it is currently cold weather

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like H.03.02: 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

Related guides you might find useful