Lopi Endeavor no secondary burn

[tvsteve1]

Lopi Endeavor and pipes installed along with OAK in 2009. Burn 24/7 thru the winter. Oak cut by me from logs, split and stacked, seasoned for 2-3 years. MC between 14 and 16%. Stove top 650 and pipe measured with Auber probe about the same. No secondary burn. Burning N-S, could never get the stove to burn E-W. Always left the back wood to smolder. Cleaned the stove and pipe end of last year. There was a thick coating of soot in the pipes. Used the soot eater to get to the top but I couldn't got my fiber brush past the offsets. First time that happened. Also I have noticed a light smoke condition tword the end of the burn. Average burn time 8 hours. Difficult to find someone willing to do a bore scope inspection of the stack.

 

[begreen]

The sooteater should easily pass through the offsets. It sounds like there might be an obstruction. This could be a bee or other critter's nest. Hopefully, it's not a plug of creosote, but that is possible. Single-wall stove pipe, with two 90º turns and a cold exterior chimney can cool down flue gases quickly toward the top of the chimney pipe, especially if some of the oak is of higher moisture content.

 

[tvsteve1]

Thanks for the reply. The sooteater had no problem reaching the top. The fiber brush with its heaver rods was the problem. In the past it had worked with some effort. My main concern is the total lack of secondary flames from the tubes .