I have an Amana gas dryer model #PLG8409W2 that won't dry. When I opened the front to look at the heating mechanism, I noted that the igniter will turn on and produce a nice red-orange glow, but it never ignites. It would appear that the gas flow doesn't turn on. Everything else on the dryer seems to be working well. I haven't done anything other than try to turn the gas valve on, and then off again, lest I muck something up by my own efforts. Can anyone tell me what the problem might be? Is this likely to be something expensive to fix? I sure hope not.