What does the Glow-worm F.75 fault code mean?

Your boiler has detected that the water pump is running but cannot sense the required change in pressure to safely start the heating process.

How much does it cost to fix Glow-worm error code F.75?

Typical repair cost for the Glow-worm F.75 fault is £130-£250 including labour.

Check the pressure gauge on the front of the boiler is between 1.0 and 1.5 bar

Pressure sensor fault

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

Six most common causes of dropping pressure.

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.