Whitfield Advantage I is shutting down after maybe getting too hot? Why and how can I fix this?

Welcome to the forum, first of all.

It's possible that the combustion motor has a thermal override and is switching the motor off after it heats up.

Since you bought the stove used, did you COMPLETELY clean the stove before installing it? And not just cleaning out the burn pot and ash pan....I mean the combustion motor & convection blowers removed & cleaned, all the ash traps opened & cleaned out, heat exchangers cleaned, etc, etc.

Also, can you describe the exhaust pipe set-up? Length of pipes, number of elbows, vertical or horizontal, etc.

Oh, and do you have the owners manual for it?

Welcome to the forum mountainmomma.

Would you also tell us at what firing rate you are attempting to run that stove?

Welcome Aboard

Get a battery power drill/screw driver and some hex nut socket ends screwdriver bits and shop vac and assorted dusting brushes, maybe a paint brush for some hard to get at spots and take things apart. Take pictures before dis assembly for reference and clean stuff particularly the passages in back of the fire brick wall. You have a good stove, but, just like me there will be a learning curve. Mine was mostly cleaning and oiling, but, I'm warm now at a minimum of cash outlay. This is a good site and you'll be happy you got a pellet stove. There's some manuals buried on this site with a little digging you'll find them. bjr23

old model
cracked air hose> blocked exhaust somewhere?

bad high limit disc?

pm me your make/model/and email addy for the svc book