Using your gas cooktop
If the cooktop does not light
If the cooktop does not light, check that:
The cooker is switched on.
The gas is turned on.
You have held down the knob for at least ten seconds.
25
The ignitors are sparking. If the ignitors are not sparking, they may be dirty or wet. Clean them with a toothbrush and methylated spirits, as shown.
Ignitor 
Flame failure probe
Figure 20 Cleaning the probe and ignitor
If the flame is irregular
If the flame is yellow or irregular, check that the burner parts, including the burner cap, are: Clean and dry.
Positioned correctly. See ‘Care and cleaning’. See also ‘Troubleshooting’.
