Harman 52i installed last fall, burned 3 tons of Turmans so far. Couple days ago, got 6 blink error and stove would shut down. Figured it was time to clean, although I was hoping to get to end of season before I had to do the exhaust flu. First time having unit out of the insert enclosure, so not sure how dirty 3 tons ought to be. Do this pic look about right? ESP cleaned up well, and is burning pretty good now, in fact it running about 25 deg hotter right now.
![Does this look about right for 3 tons? Does this look about right for 3 tons?](https://www.hearth.com/talk/data/attachments/153/153260-00812e5f2abdefb37ea9af0dd7861a0c.jpg)
![Does this look about right for 3 tons? Does this look about right for 3 tons?](https://www.hearth.com/talk/data/attachments/153/153260-00812e5f2abdefb37ea9af0dd7861a0c.jpg)