Rika austroflamm integra insert fire going out auger keeps running

rika austroflamm integra insert hard wired to rika thermostat
Normally when up to room temp it throttles down to a very low level flame or shuts down then reignites when the temp gets to my room preset minimum
Now it has been the fire goes out but the auger motor keeps running . Filling the burn pot with pellets and backing up the tube , where apparently it keeps grinding until the auger jams with pulverized pellets
Any suggestions

Cleaned air sensor , replaced low limit switch working much better