My PF100, which worked fine last season, is misbehaving, First it ignored the thermostat for the first burn. Got nice and toasty in the house. Then it would fail to relight. Now I can't get it to auto light or manual light. The most suspicious symotom is that the feed starts up as soon as I turn in the furnace. I think it's supposed to wait until the ESP reads 165°. So it can't light because it's constantly dumping pellets into the burn pot. It eventually gives me 5 blinks, which means auto ignite failed. Any thoughts on this? It does stop feeding after 1 minute in test mode, but the feed motor immediately turns on if I move the dial away from test.