Glow-worm F.29: flame loss during operation

Check these first, then call an engineer

The boiler was running and lost its flame. Glow-worm's fault table lists a temporary break in the gas supply among the causes, and its homeowner advice says F.28 and F.29 often come down to the gas supply or a frozen condensate pipe.

What you can safely do

1. Check your gas supply and prepayment meter credit.
2. In freezing weather, check the condensate pipe outside and thaw it with warm (not boiling) water.

Call a Gas Safe engineer if

• The code comes back after these checks.
• You smell gas at any point. Leave the property and call 0800 111 999.

Applies to: Energy range, Betacom A range. Codes can differ between models, so check your manual.