Glow-worm · Easicom 3 Combi
F.20 boiler fault code
Easicom 3 24c-A / 28c-A
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What F.20 means
Safety shutdown: Overheating temperature reached. Since the code table is used for various products, some codes may not be visible for the product in question.
Safe check
Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. 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.20, p. 44
installation and maintenance instructions
0020239562_06 · 18.02.2025