What does the Glow-worm F.25 fault code mean?

Your boiler has shut down because the internal exhaust gases are getting too hot, which is a safety feature to prevent damage to the appliance.

How much does it cost to fix Glow-worm error code F.25?

Typical repair cost for the Glow-worm F.25 fault is £120-350 including labour.

Safety switch-off – flue gas temperature too high

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.