Gas dryer flame not always igniting
Igniters do go bad but the ones I have had trouble with don't work at all or have area that is dark. I have had more problems with the gas mix. I have seen cases where the jets in the burner have gotten plugged or partly plugged causing problems. I have had success using a piece of wire small enough to push through each port opened them up enough. The other possible problem can be where the air is drawn in to the burner sometimes there is a screen to keep dust and spiders out if this screen gets coated with dryer lint the air/gas mix is not correct and the burner may not light. The last problem I have had is the very small orifice just after the gas valve but before the burner gets plugged. This small orifice is difficult to clean but there are usually replacements available for a couple of bucks if you change this make to get the same size there are different sizes for natural gas and propane.