No flame after ignition stage (6 times in 4 minutes)
1. Ignitor electrode fault
2. Flame unstable
3. Gas valve Offset fault
4. Air/fume ducts obstructed
5. Trap blocked
1. Check the position of the ignitor electrode and replace it if necessary.
2. Check the burner.
3. Check the Offset adjustment at minimum power.
4. Remove the obstruction from the flue, exhaust ducts and air inlet an terminals.
5. Check the trap and clean it if necessary.