Could any of you guys that have replaced your igniter post which one you got and from where? Mine works most of the time but every once in a while it doesn't work. This happens only when I want to change temps after awhile. I went from smoke to 350 and it just filled the fire box and didn't ignite. I had to shut it off and wait a couple minutes and then it ignited the pellets. This makes me leery of leaving it unattended. It doesn't do it all the time but it has happened 2 or 3 times. Any help would be much appreciated! I have a 2 week old 820.