Glow-worm F.83: no water in the installation

You can usually fix this

Glow-worm describes F.83 on Betacom A range boilers as: no water in the installation. On Glow-worm Energy boilers, Glow-worm's own fault table lists F.83 twice with two different meanings (an EEPROM fault and a burner temperature sensor fault), so check your manual.

What you can safely do

1. Turn the boiler off and let it cool.
2. Top up using the filling loop until the gauge reads 1 to 1.5 bar, as Glow-worm advises.
3. Close the valves and check the gauge again.

Call a Gas Safe engineer if

• The pressure keeps dropping, or F.83 comes back.
• You have an Energy boiler: the code can mean an electronics or sensor fault there.

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