Convection Fan Only Runs on HIGH

jonnyk45 Posted By jonnyk45, Mar 11, 2019 at 3:59 PM

  1. jonnyk45

    jonnyk45
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    I have a Breckwell SP22. Recently, it began running the room blower fan on HIGH, immediately at start-up, and no matter what heat level is set. I took everything apart and cleaned both fans inside and out. I have been reading about testing the high limit sensor and low limit sensor, the blower motor itself, or that it could be a bad control board.
    I am new to electricity stuff. I have a multi-meter - I am just wondering for sure where to start and how to do it correctly. Any help would be greatly appreciated!
    Thanks!
     
  2. Ssyko

    Ssyko
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    First thing to check is your low limit/proof of fire snap disc. It will be on the combustion blower housing. It has 2 brown wires, put your multimeter on the continuity/diod setting and pull the 2 wires off and connect the probes on each spade. If you get anything but an open circuit it is bad. Do this with the stove off and cold.
     
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  3. jonnyk45

    jonnyk45
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    Thanks for responding. Now my question is: “get anything but an open circuit”... how do I know? What will it look like?
     
  4. jonnyk45

    jonnyk45
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    Thanks for responding. Now my question is: “get anything but an open circuit”... how do I know? What will it look like?
     
  5. Ssyko

    Ssyko
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    Touch your leads together. Does your meter beep?

    1st pic is an open circuit
    2nd pic is a closed circuit
    3940E84A-D897-4017-90C1-FCD197CB066B.jpeg
    5920FEFB-A342-4BEC-9723-955D969734FD.jpeg
     
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  6. bob bare

    bob bare
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  7. jonnyk45

    jonnyk45
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    My multimeter is cheap so I don’t think (or haven’t heard or found anything) that it beeps.
    When I put it in diode mode and touch the leads, the numbers on screen bounce around, eventually into “00single-digit”
    upload_2019-3-27_21-19-55.jpeg

    upload_2019-3-27_21-20-37.jpeg


    So I touched the brown wires. Doing it one way just showed “1” on my meter; switching the sides with black and red fired up the motor and gave me readings in the 1100s


    upload_2019-3-27_21-23-50.jpeg

    upload_2019-3-27_21-25-17.jpeg

    Is this the bad part or is that exactly what it should do?
     
  8. zrock

    zrock
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    I think your in over your head. Stop before u get hurt or cause more damage. Call a buddy with a good meter and knows how to use it. U will thank yourself in the long run

    Sent from my SM-G950W using Tapatalk
     
  9. Ssyko

    Ssyko
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    You probably smoked that harbor freight meter. The power coming out of the control board is 120vac. I would recommend finding someone you know that’s familiar with a meter. 120 line voltage will bite. If you continue put the meter on AC, that is what your testing.
     
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