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AC disconnect switch

HI, can I have you option / help on something. My friend Central AC is not working and, I told her to look for the out side disconnect switch. She found it and sent me these pics, I never seen anything like this, does this take a fuse? or does it just press In? Or is it broke?

Thanks - Tom


  • BobCBobC Member Posts: 5,128
    That is a common disconnect box. If you plug it in with the "ON" up the circuit will be complete and the AC could run. If you plug it in with the "OFF" up the circuit will be open and the AC can not run.

    There is no fuse in the box.

    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • Tom batesTom bates Member Posts: 27
    Thanks, So the last photo, is the correct way for it to run? I also would like to know should it be pressed in hard or just soft?
  • Jamie HallJamie Hall Member Posts: 13,417
    Hard. Those contacts have to fully engage, and they aren't meant to be easy. The handle thingy has to rest at least flush with the enclosure.
    Br. Jamie, osb

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • Tom batesTom bates Member Posts: 27
    edited June 2016
    Thank you. I will tell her, I will let every one know if it will work
  • FredFred Member Posts: 8,440
    edited June 2016
    She also needs to check the Breaker box, inside the house and make sure the, Breaker for the circuit, that feeds that box has not tripped.
  • JUGHNEJUGHNE Member Posts: 7,203
    Does the furnace fan run when there is a call for cooling?

    If not does the fan run with fan switch "on"?
  • John Mills_5John Mills_5 Member Posts: 935
    Any fuses would be behind the plastic panel below the pull bar.
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