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Ac not work

Hit by lightning. Fan wont shut off. Relays on PCB(honeywell ST9103A1036) are good. Unplug thermostat, AC, and heater from PCB and fan still spins.

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  • paulgmars May 13, 2010

    IC is bad
    four lead, its marked:
    L 9948
    814
    (large dot) Y

    where can i get it??

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  • Master
  • 415 Answers

PCB's are very weak against lightening strikes and are usually the first items in need of replacement. If you have unplugged everything from the PCB except the power going in and the fan connections, then the PCB is damaged and will need to be replaced.

Posted on May 07, 2010

  • laura Newman May 13, 2010

    Contact the manufacturer of your unit. They will need your model number and serial number. :-)

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