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Honeywell damper repair or replace?

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RascalOrnery
RascalOrnery Member Posts: 127
in Thermostats and Controls

Our church facility uses forced hot air for two zones, we have had problems in the past with the damper controls and they just get replaced.

IMG_20260204_195358443_HDR.jpg

This one on the second zone is stuck shut and does not respond when the thermostat calls and instead the hot air just dead heads against the damper and some overflows into the other zone. Is this damper repairable? If not, is the replacement as simple as the removal and install of a new one of the same make model? Our service company is very busy with frozen pipes and all the common things this time of year so we'd like to make it easier and just do the replacement ourselves.

I'm reasonably mechanical and technically inclined and it seems to me that a swap is straight forward but I don't want to assume too much, any advice?

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Comments

  • Big Ed_4
    Big Ed_4 Member Posts: 3,428

    Shut off the power it should spring open . If it opens it could be the thermostat .. If it stays shut something is jammed ..

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  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 11,816

    Looks like a line voltage motor and it has a spring return that appears to be in the (ZERO) 0 % or closed position. Dors the motor open when power is applied? If yes, then the actual damper may be stuck. Can you adjust the actual damper by hand? You may be able to operate the system manually until you get the motor working.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    HVACNUT
  • 109A_5
    109A_5 Member Posts: 3,734
    edited February 5

    Looks like it would be fairly easy to independently test. Make sure it is the problem. Is it under any warranty ?

    image.png image.png

    https://s3.amazonaws.com/s3.supplyhouse.com/product_files/MS4105A1030-Install.pdf

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • HVACNUT
    HVACNUT Member Posts: 7,337

    Does the damper move freely now that the actuator is out? Do you know if the problem is the actuator or the linkage?

    If you were to order a new damper complete, when you order it, the second measurement is the side the actuator is on. Example, if the duct is 24x36 and the actuator is on the 24, you order the damper as 36x24.

  • RascalOrnery
    RascalOrnery Member Posts: 127

    Thanks everyone, yes actual duct damper is movable by hand. I'll verify power and then plug it in and see if maybe it isn't receiving power when the thermostat calls

  • Big Ed_4
    Big Ed_4 Member Posts: 3,428

    The zone damper needs power to close.. The spring brings it back to normal open ..

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