The burner parts have shifted out of place.
Correctly assemble the burner parts.
Consult the operating instructions for further information.
The flame is extinguished on the gas hob after being lit.
Correctly assemble the burner parts.
Consult the operating instructions for further information.
Use a higher setting when lighting the gas burner. Stop the draught.
Once the gas has ignited, keep holding the rotary control for another 8 seconds or so. Please push the rotary control in again slightly before releasing it.
Clean the burner in accordance with the operating instructions.