Jotul F3 over fire problems

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by wormy, Oct 21, 2006.

Thread Status:
Not open for further replies.
  1. wormy

    wormy
    Expand Collapse
    New Member

    Joined:
    Oct 21, 2006
    Messages:
    1
    Likes Received:
    0
    Hey, I have a new jotul f3 and simply love the stove. Burns great and heats wonderfully.
    I have only one problem. It seems that if I add more than one piece of dry red oak or loqust the stove quickly goes to 700 degrees or hotter with no control. Of course I completly shut off the air before loading. Im vented vertically out the back of the stove with a tee about 14 feet high with Dura vent pipe. Wondering if I should consider a damper. Right now burn times are short because I can only load one piece at a time to prevent over fire. Any one else had any experience????
     

    Helpful Sponsor Ads!





  2. begreen

    begreen
    Expand Collapse
    Mooderator
    Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    60,657
    Likes Received:
    7,676
    Loc:
    South Puget Sound, WA
    I had a similar setup and had to add a draft damper on our F3 to gain a better degree of control over hot fires. It will settle down, albeit slowly if the air is restricted, but if done too quickly it can backfire when the unburned gases try to ignite. The draft damper made a lot of difference in the degree of control. We could keep the air control open much wider with a fresh load of wood and the stove seemed to heat better too.

    Before opening the door to load wood, one should open the air control (and draft damper if installed) first.
     
    Collapse Signature Expand Signature
  3. Roospike

    Roospike
    Expand Collapse
    New Member

    Joined:
    Nov 19, 2005
    Messages:
    2,859
    Likes Received:
    3
    Loc:
    Eastern Nebraska
    Boy that just dont sound right at all. Sounds more a like the workings of a pot belly stove with that lack of control.
    "1 log , air turned all the way down and a fire running up to 700°" !?!?!?

    Vented out the back with a T and only a 14' high stack sounds more like it should have under draft issues and not run away fires.

    Stove sounds like its not air tight or a bad seal system.
     
    Collapse Signature Expand Signature
  4. Roospike

    Roospike
    Expand Collapse
    New Member

    Joined:
    Nov 19, 2005
    Messages:
    2,859
    Likes Received:
    3
    Loc:
    Eastern Nebraska
    Collapse Signature Expand Signature
  5. MountainStoveGuy

    MountainStoveGuy
    Expand Collapse
    Minister of Fire

    Joined:
    Jan 23, 2006
    Messages:
    3,654
    Likes Received:
    2
    Loc:
    Boulder County
    Make shure the ash pan is shut tight, and the door seals are all in order. Do the dollar bill test.
     
    Collapse Signature Expand Signature
  6. BrotherBart

    BrotherBart
    Expand Collapse
    Hearth.com LLC Mid-Atlantic Division
    Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    32,429
    Likes Received:
    9,637
    Loc:
    Northern Virginia
    Yeah, I am thinking ash pan area air leak here too. The ash pan housing on the F3 is sheet metal and there is a thin ceramic glass gasket between it and the stove bottom. If the screws are loose that pup would be sucking major air up through the grate.

    Also, I have to ask the OP if he is closing the center "start-up" air inlet in the middle of the door by pushing it to the left after the fire starts up. I forget the thing all of the time.
     
    Collapse Signature Expand Signature
  7. webbie

    webbie
    Expand Collapse
    Seasoned Moderator
    Staff Member

    Joined:
    Nov 17, 2005
    Messages:
    12,190
    Likes Received:
    1,086
    Loc:
    Western Mass.
    That stove has a small firebox - and a hot one. It will tend to go up and up. Yes, I think a damper might help - or maybe have some wood that is not bone dry. Since it is a "base burner", meaning most of the base of the fire is always sitting on hot coals, it can be tough to turn it down. When you add new wood, that starts the burning of gases at the top of the stove (it's a non-cat), which of course raises the temp.

    You might be able to experiment moving the hot coals to one side of the firebox before reloading - or maybe to the rear, so you lower the amount of critical mass burning at once.
     
    Collapse Signature Expand Signature
  8. wahoowad

    wahoowad
    Expand Collapse
    Minister of Fire

    Joined:
    Dec 19, 2005
    Messages:
    1,630
    Likes Received:
    132
    Loc:
    Virginia
    Maybe it is your thermometer? I had to buy three and do some calibration testing before I finally had one I felt was close. Now I have two I trust although there are even differences between these. Both provide the same temp at a stable burn but one seems to take longer than the other to respond.
     
    Collapse Signature Expand Signature
Thread Status:
Not open for further replies.

Share This Page