Vokèra · Easi-Heat i
A90 boiler fault code
Easi-Heat i
What A90 means
Flue gas probe fault (transitional)
Emergency guidance
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.
Open the emergency safety guideWhen to contact an engineer
Your boiler has shut down for safety. Don't keep resetting it. Leave it off and get a Gas Safe engineer to check it.
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.
Source and provenance
- Vokèra Easi-Heat i Users Instructions · error code table, p. 8; installer section, p. 28
installation manual
Official PDF path dated 2025/09; no document revision is printed