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    kmb2113's Avatar
    kmb2113 Posts: 10, Reputation: 1
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    #1

    Apr 25, 2016, 11:55 AM
    Dishwasher PF Code
    I have an LG LDS5811ST dishwasher that keeps displaying the PF code after turning off in the middle of a cycle and currently won't turn on at all. I have checked the voltage of the circuit it was connected to and verified it was 120v. I checked the wire connections on the dishwasher to verify they were all connected and secure. I have tried running it off another circuit to try and eliminate in house wiring problem on it's dedicated circuit. I have replaced the noise filter and verified there is 120v of power in and out of the noise filter. I have replaced the main control board after verifying I had power to that point. I ran one full cycle after I plugged it in to an outlet on anther circuit and then it wouldn't turn back on. I am now one step away from the sledge hammer and in search of some assistance. Any ideas?
    drtom4444's Avatar
    drtom4444 Posts: 3,282, Reputation: 145
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    #2

    Apr 26, 2016, 05:04 AM
    Make sure to check all of your safeties. That's what it sounds like.
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
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    #3

    Apr 26, 2016, 06:39 AM
    LG Dishwasher Won't Start - Model LDS5811ST/01 - Repair Parts - RepairClinic.com

    5 common failures, door latch number 1

    Watch the attached video.
    kmb2113's Avatar
    kmb2113 Posts: 10, Reputation: 1
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    #4

    Apr 27, 2016, 04:29 AM
    Checked the door switch, it's OK.
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
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    #5

    Apr 28, 2016, 12:05 AM
    The only things left is a bad circulation pump, or a faulty drain pump. Or a bad float switch. Or a bad thermal fuse. This is an easy check.

    https://www.youtube.com/watch?v=L-bMqVb9kX0
    kmb2113's Avatar
    kmb2113 Posts: 10, Reputation: 1
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    #6

    Apr 28, 2016, 08:35 AM
    I believe the thermal fuse on this model is part of the control board I already replaced. All the control board components are "glued in" so I can't remove or test them. Wouldn't one of the other components give me an error code instead of preventing it from starting?
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
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    #7

    Apr 28, 2016, 10:05 AM
    Normally YES, but NOT if an electrical/component malfunction is shutting the dishwasher down. If you have a manual then refer to the Customer Service number.

    1-800-243-0000 24 HOURS A DAY, 7 DAYS A WEEK FOR LG CUSTOMER SERVICE

    Sorry I could not be of further help, but please keep us updated as to your progress and outcome.

    Please don't resort to the hammer yet! :I You have a condition beyond the normal here, and requires a deeper approach.
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