Customer says it gets a little warm but that's it. She says she usually heard the "roar" and when she did not hear that she knew there was something not lighting.
I went out and looked thru the viewport, and the glow plug glows, then the unit fired, looks like low flame, then ran for about 30 seconds and shut off. After that, the glow plug would glow, but the burner would not come back on. I also heard no clicking in the gas valve at all.
unit is not clogged with lint and it's only about 6 feet of pipe to the outside and I checked it and it's clear.
Seems like the solenoids, but I was extremely paranoid about pulling the front off the machine. On another machine I tried that and the drum kind fell out.... I just watched the video on replacing the solenoids and it looks pretty simple, taking the top off first then the front.