Glow-worm · Ultracom2 cxi 24/30/35
F20 boiler fault code
Ultracom2 cxi 24/30/35
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What F20 means
Overheating fault — safety device activated (97°C).
Gas Safe engineer: Contact a Gas Safe registered engineer for diagnosis of this overheat fault.
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.
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.
Safe check
Note the displayed code. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
When to contact an engineer
Contact a Gas Safe registered engineer for diagnosis of this overheat fault.
Source and provenance
- Ultracom2 cxi I&S · 0020112601_02 (10/12) · §15.3 Fault codes · F20, printed p. 34
installation and servicing instructions
0020112601_02 (10/12)