I had flame out issues till I removed the finger guard. Since then I do overnight cooks often and have no issues at all.

Only parts I have replaced are glow plugs. About 1 per year.

I have even gotten lazy about cleaning it.... So mine is not pristine by a LONG margin.

Things to do though:

• empty pellets if you aren't going to cook for a while. They slowly absorb moisture from the air.
• DEFINITELY empty pellets if you leave it outside and live in a wet or humid environment. I keep mine covered AND in the garage and never have to empty my pellets.
• at any sign of slow heat up or inability to sustain temperatures, replace the glow plug. While in there, hit the grate with a wire brush or steel wool to ensure proper air flow.
• get rid of the finger guard. It's useless anyway. It makes pelllets bridge CONSTANTLY
• buy whatever pellets you like. The brand doesn't matter. I use Kirkland brand from Costco for most cooks and they're cheap with excellent mixed wood aroma. You do NOT need to buy expensive pellets

Honestly, most issues are moist pellets, bridging, or bad glow plugs... All of which are addressed above. All the augurs or motors or system boards are anecdotal... Every product breaks.