dhall28
Burning Hunk
muffler could be plugged with pellet fines, in which case normally you can take the hose and hooking it up to the muffler you can blow through it to clear it out of the fines. If this does not help, you have an airflow issue, air coming into the stove at the wrong area or air not exiting the stove as it should. Something as small as one pellet sticking into the door gasket on the hopper lid can sometimes be enough to allow air in and cause the pellet hopper to lose proper vacuum. Vacuum issues are like vacuum issue on a car, ever joint and part becomes possible of leaking air and needs checked but there are ones that are common culprits such as improperly cleaned stove, door gaskets, improperly attached fine box clean out cover, etc