Auger Noises in a Harman Accentra-2

Are you sure it's not just crunching a pellet? Have you tried different pellet brands? You should see scrape marks on the sprocket if it's the chain.

could be your sprockets are worn enough such tnat they ride over more easily.....how sharp are the sprocket teeth? When they wear, they tend to get fairly sharp........the chain is a harder steel than the sprockets, so, they wear with time....(there is a sprocket replacement kit available from your Harman dealer......Harman stopped making the single sprockets available a couple years back and instead came out with a kit which includes 2 sprockets, the feeder motor frame, a chain, and the nylon "idler" bushing...be prepared, this kit is pretty expensive....)

Also check your fines box and see how much fines are in there.....if its full or nearly so, there can be enough resistance in the slide plate armature to cause the feeder to overpower the sprockets and force the chain over them.......apologies if you already checked this, but alot of folks dont realize they fines containers need to be cleaned.....its easy....one wing nut....but often overlooked.

It's not catching on built up carbon where the auger meets the burn pot is it?

Edit: No one ever mentioned a fines container to me. I would think that would have been mentioned at my install.

Take the right cover off the back, a few inches behind the motor for the chain you'll see a wing nut that holds a flat plate on. Cover the impeller of the blower motor before removing the plate, all the fines in the small box behind the plate will fall into the blades if you don't. If the hopper is empty when you do this it's a good idea to remove the slide plate for cleaning, being careful to note how it fits. If you've never cleaned this box it's almost certain to be the source of your noise.

most likely, thats your issue, IHUNT....older unit, fines container never cleaned out...im guessing its probably PACKED.........if you go to http://homewarmth.com/pdffiles/accentracleaninginstructions.pdf , and then go to page 4, look at figures 13 & 14, you should see what you need to to accomplish this task.

try to isolate the noise.......hard tofix something if you cant tell whats making the noise......if you want to just throw parts at it, put a new gearmotor on it.......you also might try snugging up the uager retaining bolts on either side of the auger....possible they loosened and are causing the auger tocontact the auger tube, causing the squeek......possible hard carbon at the end of the auger causing it to rub as well.....