F29F1On Glow-worm boilers, fault code F28 means: No ignition: gas supply problem or frozen condensate pipe. The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.
Can I keep using the boiler?
The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.
Common causes
- Gas supply off or interrupted (closed valve, prepayment meter out of credit)
- Frozen or blocked condensate pipe
How to fix it
- Check the gas supply is on: gas valve open, meter has credit and other gas appliances work
- Thaw a frozen condensate pipe with warm (not boiling) water, then reset the boiler
- Press the boiler's reset button once and wait for it to restart
- Don't keep resetting: if the code returns, switch off and call a qualified gas engineer
Frequently asked questions
What does Glow-worm error F28 mean?
On Glow-worm boilers, fault code F28 means: No ignition: gas supply problem or frozen condensate pipe.
How do I fix Glow-worm error F28?
Start with these steps: Check the gas supply is on: gas valve open, meter has credit and other gas appliances work; Thaw a frozen condensate pipe with warm (not boiling) water, then reset the boiler; Press the boiler's reset button once and wait for it to restart; Don't keep resetting: if the code returns, switch off and call a qualified gas engineer.
Is it safe to use the boiler with fault F28?
Severity: Medium. The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.