Glow-worm · Easicom 3 Combi
F.22 boiler fault code
Easicom 3 24c-A / 28c-A
Get a Gas Safe engineer
Free. Enter your postcode.
What F.22 means
Safety shutdown: Water deficiency in the boiler. Since the code table is used for various products, some codes may not be visible for the product in question.
Safe check
Check the boiler's pressure gauge. If it reads low with the boiler cold, top up the system to the pressure in your user guide (usually 1 to 1.5 bar) using the filling loop, as the user guide describes. If the pressure keeps dropping or the code returns, contact a Gas Safe registered engineer.
When to contact an engineer
The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- Glow-worm Easicom 3 Combi Installation and maintenance instructions · Appendix E “Overview of fault codes”, F.22, p. 44; §9.5 “Avoiding danger arising from insufficient water pressure”, p. 25
installation and maintenance instructions
0020239562_06 · 18.02.2025
Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
Did this fix it?
After: Repressurise the boiler