USSC King Stove 5502M _ mini "explosion" ???

  • 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.

tractorboy924

Member
Jul 7, 2008
74
Western NY
As stated I have a king stove and recently had something I never experienced before. Clean regularly and same with chimney but I heard a POP the other night and it was like all I can describe as a mini explosion in the burn pot area....... It even backfire some small sparks out the fresh air intake on the back of the stove......I verified after the hopper didnt have a fire and all was fine...gonna shut down tonight and do a really super duper clean of it all including chimney.

Does anyone know what this is. or what happened?? I have had about 5 seasons and never experienced this before.

I guess I verify the fresh air intake is clear too tonight when I do a through clean. Happened twice as my wife said happened once during the day too a week or so ago.

Not sure what I can do other than a good deep clean again like I would do in the spring when season over. Ive got to get a new burn pot too as over the years it has warped so it hard to remove. but all openings clear....it happened during the start up cycle actually if that info is relevant.......just after flamed start and about a min after the room fan kicked on.....

Thank you for any input.
 

johneh

Minister of Fire
Dec 19, 2009
3,880
Eastern Ontario
Have you changed the pellet brand?
This has been reported before. What happens is the
stove fills with smoke just before pellet ignition
apon ignition the smoke does a flame over(Flashover) from the gases in it
which has been described as an explosion
I have had it happen with my Enviro stove and I stopped using
that type of softwood pellet
 

tractorboy924

Member
Jul 7, 2008
74
Western NY
Hmmm ok.... I have changed pellet brand but I find this pellet brand to be the best Ive ever used and heats well!!!!! for a once in a while thing im not gonna stop using this brand..... they put out good heat but atleast that explains whats going on.

Thanks
 

johneh

Minister of Fire
Dec 19, 2009
3,880
Eastern Ontario
mind me asking what brand?
It will also happen when the burn pot has too many pellets in it at ignition
 

tlc1976

Minister of Fire
Oct 7, 2012
975
Northwest Lower Michigan
I have it happen from time to time. Sometimes ignition is fairly fast and sometimes it takes several minutes of smoke and sparks. No change in pellets or anything. I always attributed it to the randomness of how the pellets fall. If one lands right at the igniter hole it should start quickly. If it ends up making more air space around the hole then I can see where it would take longer to ignite.
 

m159267

Burning Hunk
Mar 12, 2009
212
East-Central MO
Sounds like a temperature inversion in the chimney.
 

Oregun

Burning Hunk
Jan 12, 2017
135
Oregon
My old woodstove did this all the time if I didn't have the air adjusted right. My pellet stove only did it once so far.
 

UpStateNY

Feeling the Heat
May 4, 2008
416
Catskill Mountains
Not sure if this helps. In 1960s my parents heated with a Kerosene stove in the living room. Basically kerosene would run out onto base of a metal heating chamber. It had an 8 inch stove pipe. What would happen maybe twice in 10 years on a very windy day is the wind would come up over the top of the roof peak and cause an extreme down draft in the chimney , which would blow out the flame. Then the smoke would reignite, explode, and blow the 8 inch stove pipe off the wall in the living room. Very fine soot everywhere.

So when your stove exploded just how windy was it outside?