I have a Whirlpool gas range with knobs that have a "Lite" position
where it clicks (sparks) to light the burner. Sometimes the ticking
is weak (sounding) and won't light the burner. At those times I use a
match to manually light the burners. This happens to all four burner
igniters so I don't think it is a cleaning issue. Anyone have a clue
what part needs repair? TIA