Woodstove flue damper not closing/opening

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.

Mister B

New Member
Jan 11, 2022
1
Gainesville MO.
Recently got a Pleasant Hearth WSL-1800-B woodstove. It seemed to be working properly for the first couple days. Now the flue damper seems to be jammed at least in partial open position. But even when getting control to move, it effects no change and I'm burning through too much wood. While cleaning out ash, I found a broken piece (approx 3 1/2" X 3" with a step) of firebrick thinner than brick lining the box. When moving it into the house it was necessary to turn the stove on its side... Some bricks became dislocated and were put back into place. I don't know where the broken piece came from and can't find diagrams to be able to find and fix the issue. Any help would be appreciated.
 

Jesepi

New Member
Nov 19, 2021
32
NW Pennsylvania
Recently got a Pleasant Hearth WSL-1800-B woodstove. It seemed to be working properly for the first couple days. Now the flue damper seems to be jammed at least in partial open position. But even when getting control to move, it effects no change and I'm burning through too much wood. While cleaning out ash, I found a broken piece (approx 3 1/2" X 3" with a step) of firebrick thinner than brick lining the box. When moving it into the house it was necessary to turn the stove on its side... Some bricks became dislocated and were put back into place. I don't know where the broken piece came from and can't find diagrams to be able to find and fix the issue. Any help would be appreciated.
I have the Pleasant Hearth WSL 1800 medium stove and the primary air control at the top right of stove will not close all the way.
Not sure if its designed to operate that way or not. It opens all the way but when closed it leaves about a 1/4" gap so it remains open. Let me know if your stilll having trouble with yours and if you have found a fix. I was told that there is no adjustment for it.
 
  • Like
Reactions: MR. GLO

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,682
central pa
I have the Pleasant Hearth WSL 1800 medium stove and the primary air control at the top right of stove will not close all the way.
Not sure if its designed to operate that way or not. It opens all the way but when closed it leaves about a 1/4" gap so it remains open. Let me know if your stilll having trouble with yours and if you have found a fix. I was told that there is no adjustment for it.
That's how it's supposed to work
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,682
central pa
Oh, I do not like the manual they sell with this stove. Well Thank you bholler. Do you by chance own a Pleasant Hearth stove ?
Nope. But all modern stoves have a minimum air setting on them like that
 

Highbeam

Minister of Fire
Dec 28, 2006
19,773
Mt. Rainier Foothills, WA
Nope. But all modern stoves have a minimum air setting on them like that
Right, and some are even sneakier where you think and it feels like you have fully closed the control but there is another hole somewhere letting a fixed amount of air into the fire to keep it burning hot enough to not pollute.
 

Jesepi

New Member
Nov 19, 2021
32
NW Pennsylvania
Right, and some are even sneakier where you think and it feels like you have fully closed the control but there is another hole somewhere letting a fixed amount of air into the fire to keep it burning hot enough to not pollute.
you know, I took the ash pan out and looked underneath and I'll be darned there was a small hole drilled out at the bottom under where the primary air tube is located.
Thanks again all. What a great site this is !
 
  • Like
Reactions: Highbeam

MR. GLO

Feeling the Heat
Jan 26, 2021
352
Massachusetts
I have the Pleasant Hearth WSL 1800 medium stove and the primary air control at the top right of stove will not close all the way.
Not sure if its designed to operate that way or not. It opens all the way but when closed it leaves about a 1/4" gap so it remains open. Let me know if your stilll having trouble with yours and if you have found a fix. I was told that there is no adjustment for it.
With the cold and high wind its change my draft and new epa stove eating wood.....even with a pipe damper closed the best I can get is .08 but I half to make more trips to basement to open damper to make sure flue stays warm and hot so my chimney stays clean.
 

Jesepi

New Member
Nov 19, 2021
32
NW Pennsylvania
With the cold and high wind its change my draft and new epa stove eating wood.....even with a pipe damper closed the best I can get is .08 but I half to make more trips to basement to open damper to make sure flue stays warm and hot so my chimney stays clean.
My draft seems to be very good here. Chimney height is 21' and is a outside chimney. Triple wall insulated 6" dia.
Im still learning to burn tho. Only been doing this for about a month. Im going to try an all nighter soon. Storm heading this way now so may try tonight. I love all the informayion I am getting from so many veterans of wood burning !
Thank you !
 

snobuilder

Feeling the Heat
Dec 16, 2021
432
WI
you know, I took the ash pan out and looked underneath and I'll be darned there was a small hole drilled out at the bottom under where the primary air tube is located.
Thanks again all. What a great site this is !
That 1/2" hole and 90 degree tube above it is always open and directs combustion air at the base of your fire.
The primary air intake is above the glass and can be closed aprox 75%.

The insulating panel above the 4 secondary burn tubes looks alot like the fire brick that lines the fire box but is a much lighter material. Next time your fire is completely out look up at the secondary tubes and turn the chimney damper open and closed. The piece you found might be broke off that insulating panel/damper. It could be you are not fully closing the chimney if a piece is broken off.
 
  • Like
Reactions: bholler

begreen

Mooderator
Staff member
Nov 18, 2005
93,751
South Puget Sound, WA
^^ Good tip! ^^
 

snobuilder

Feeling the Heat
Dec 16, 2021
432
WI
That 1/2" hole and 90 degree tube above it is always open and directs combustion air at the base of your fire.
The primary air intake is above the glass and can be closed aprox 75%.

The insulating panel above the 4 secondary burn tubes looks alot like the fire brick that lines the fire box but is a much lighter material. Next time your fire is completely out look up at the secondary tubes and turn the chimney damper open and closed. The piece you found might be broke off that insulating panel/damper. It could be you are not fully closing the chimney if a piece is broken off.
Sorry I think I meant this post for the OP "mister B"
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,682
central pa
That 1/2" hole and 90 degree tube above it is always open and directs combustion air at the base of your fire.
The primary air intake is above the glass and can be closed aprox 75%.

The insulating panel above the 4 secondary burn tubes looks alot like the fire brick that lines the fire box but is a much lighter material. Next time your fire is completely out look up at the secondary tubes and turn the chimney damper open and closed. The piece you found might be broke off that insulating panel/damper. It could be you are not fully closing the chimney if a piece is broken off.
Yes good suggestion