Vokera Vibe fault A10

Flame lockout / condensate drain obstructed / flue gas exhaust/air suction obstructed

Gas boiler

What it means

Definitive flame lockout alarm; may be triggered by flame failure, an obstructed condensate drain, or obstructed flue gas exhaust/air suction.

Likely causes

  1. Faults arising during ignition
  2. Faults arising during operation
  3. Flame failure during ignition or operation
  4. Condensate drain obstructed
  5. Flue gas exhaust/air suction obstructed
  6. Flue components incorrectly assembled, fixed or supported
  7. Flue or flue terminal obstructed
  8. Degraded seals around appliance burner, internal flue seals, door and case seals
  9. Mixing of combustion products and inlet air due to flue integrity failure
  10. Damaged or worn burner insulating panel

Where to start

  1. Press and hold reset button for >2 seconds to attempt reactivation of normal operation
  2. Check condensate drain for blockage
  3. Check flue gas exhaust and air suction paths for obstruction

The full answer, free

  • 41 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.

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