I am a DIY guy all the way. So when it came to a pellet stove I knew I would be doing all the maintenance and the fixing. To ensure the heat keeps coming, I purchased a few key items even though the stove is still under warranty. ESP Probe Combustion Fan w/Blade. Auger Motor Exhaust and burn pot gaskets. Control board Door gasket So why do I keep spare parts? Its a bit of an expensive for sure but think of the advantages.You can get the fix on immediately. Swap in PMed motors each season. For the deep cleans, swap in clean parts to speed things up i.e. combustion/convection fan. The control board was really pricey but if the pots wear out or something else gives, swap and fix up the old board. Much, much cheaper than new especially if you fix it yourself. Plus I figure the parts aren't going to get any cheaper. Yes, some day they will fail. Ask Murphy. I am still a very new pellet burner but I think I have my bases covered on the major fail items. Do you keep spare parts? Which ones? Why?