We have a small gas hob on our boat running from bottled propane.
It has the (mandatory on boats) flame detection failure shut off. Thus to light the gas you turn the knob, press it in to override the flame detector, light the flame and keep the knob pressed in for a few seconds until the flame detector thermocouple (?) has heated up to keep the gas on.
One of the three burners won't start at all, i.e. pressing the knob to override the flame detector doesn't allow gas through to the burner.
Does anyone know the likely cause? I.e. is it simply something sticking in the mechanism which might be fixed by a thorough clean or is there a specific part which may need replacing?