Shelter sf1000 flc and duct blower

Ronbestsf1000 Posted By Ronbestsf1000, Jan 29, 2019 at 10:20 PM

  1. Ronbestsf1000

    Ronbestsf1000
    New Member 2.
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    Jan 29, 2019
    2
    0
    Loc:
    Michigan
    I have a shelter sf1000. Tonight got real hot top of fire box door was red hot. My duct blower will only run for 10 seconds to a minute then shut off periodically. House struggles to get to 70 degrees which is not right. Fire box is definitely getting hot enough to where I cant even put my face in front of it. I’m new to this. Right now I have a wood burning and propane running and as some of you may know that’s eating the wallet. Why is my duct blower not running the adequate amount of time to heat my house when firebox is hot enough?
     

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  2. Medic21

    Medic21
    Feeling the Heat 2.
    NULL
    

    Feb 26, 2017
    370
    236
    Loc:
    Northern Indiana
    I have that same problem when I overload mine with ash, elm, or any other wood that puts off a lot of heat quick. Are you able to monitor your flue temps? I will turn the blower on continuously when I see 450 or over flue temps and let it run down to around 350. The other thing I’ll donis mix the load with oak or locust to temper that really hot burn.

    The thermostat is in the back of the cabinet and the hottest part is in the front. Never understood their reasoning for that. But, then again i don’t understand their reasoning for 99% of this stove. Just waiting for the cash in hand this spring to replace it.
     
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  3. brenndatomu

    brenndatomu
    Minister of Fire 2.
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    Aug 21, 2013
    3,796
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    Loc:
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    I would say that the switch controlling it has an issue, but these FC1000s have so many issues I'm not confident there is a switch problem...not much help I know...maybe try tapping the switch, see what it does. Those "snap switches" can be glitchy sometimes. I even had problems with the low limit snap switch on my Kuuma...and then the replacement one too. I put a Honeywell fan control/limit switch in to replace it then, problem solved.
    But I doubt you have the room to do that on the FC1000...
     
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  4. Medic21

    Medic21
    Feeling the Heat 2.
    NULL
    

    Feb 26, 2017
    370
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    Loc:
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    They have a honeywell from the factory.

    9424406E-156D-497D-BBAD-C198F57F6F6F.jpeg

    Really surprised but it’s keeping up today. -18, -48 windchill. Hoping this little bit will get me to the south facing window solar action.

    4CF0421D-738B-4AE5-92E2-0F8D75AD7F98.jpeg
     
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  5. Ronbestsf1000

    Ronbestsf1000
    New Member 2.
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    Jan 29, 2019
    2
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    Loc:
    Michigan
    Did yours ever get red hot by the fire box door?
     
  6. Medic21

    Medic21
    Feeling the Heat 2.
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    Feb 26, 2017
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    Loc:
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    Yep, occasionally will still.
     
  7. Mrpelletburner

    Mrpelletburner
    Feeling the Heat 2.
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    Jan 20, 2011
    470
    122
    Loc:
    Mass
    I also had the red glow and it is scary to see in person. I now have the FC1500 and the same “can” happen, but it is above the door.

    IMG_0393.jpg

    Any back puffing?
     
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  8. Mrpelletburner

    Mrpelletburner
    Feeling the Heat 2.
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    Jan 20, 2011
    470
    122
    Loc:
    Mass
    You are exactly where I was 1 year ago!

    Last year when started down the HY-C (Shelter/Fire Chief) highway, I drove most folks on this form nuts with calling things the wrong name.

    The rear blower is referred to as the “distribution blower”.

    The front blower is referred to as the “draft blower”.

    Let me give this a shot...
    Basically the fire box heats up (as you can see from the red glow) the plenum (top area of the unit), which has a high-limit switch (rear of the unit) which controls the distribution blower and can turn off the draft blower, if the plenum gets to hot.

    As soon as the distribution blower kicks on, the hot air that has built up is pushed into the duct system, drawing in cooler air. As the temperature in the plenum drops, the distribution blower will stop because the low limit of the high limit switch is triggered. This is referred to as cycling. The goal is to get the distribution blower to stay running until the fire box is no longer supplying heat or needs the draft blower to kick on. This is a learning process and can take a couple months of burning to learn how the unit responds (burns). I am on my 2nd year and only now am I getting the hang of things.

    The first thing that can cause the plenum temperature to drop really fast is cold air entering the distribution blower.

    Is is possible for you to post more photos of your setup and provide more details of where the unit is? How much space are you trying to heat?

    Some folks have had luck with this unit, however most face back puffing issues out of the draft blower.

    Not sure if any of this was helpful as I am on my 2nd year and still feel like a newbie.
     
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