Vokera Vibe fault A41
Fill the system (transitional)
Gas boilerWhat it means
Transitional fault shown when pressure value falls below the 0.3 bar safety value; displayed for a transitory time of 10 minutes. If fault persists after this time, fault code A40 appears.
Likely causes
- System pressure fallen below 0.3 bar safety value
- Low system water pressure below 0.3 bar
- Leak in heating system
- Faulty seal or joint
Where to start
- Monitor pressure for 10 minutes to see if it self-corrects or escalates to A40
- If fault persists beyond 10 minutes, A40 will appear
- Open the filling valve slowly until water is heard entering the system
The full answer, free
- 4 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 28), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Vokera manual for the Vibe. Check the model on the data plate before you order parts.
Other Vokera Vibe fault codes
- A10Flame lockout / condensate drain obstructed / flue gas exhaust/air suction obstructed
- A30Fan fault
- A40Fill the system
- A59High power supply voltage
- A60DHW probe fault
- A70Flow sensor fault / flow sensor overtemperature / flow/return sensor differential
- A80Return probe fault / return probe overtemperature / return-flow sensor differential
- A90Flue gas probe fault
- A91Reset operating hours counter (related to fault A91)
- AF1Heating anti-freeze protection active
- AF2DHW anti-freeze protection active
- CFSService call signal / periodic boiler control
- E091Heat exchanger cleaning required (unusual usage threshold)
- SFSSTOP FOR SERVICE (permanent inhibition)