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    theoali's Avatar
    theoali Posts: 7, Reputation: 1
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    #1

    Jul 19, 2013, 01:50 PM
    Pipe freezing over
    I've narrowed it down to when my system freezes over but don't know why it is doing it. On my thermostat, if I turn the system "off" and put the fan to "auto" rather than "on", within an hour, the pipe coming into the house to my unit freezes up. Also, when it's in this state, my unit outside never stops working. If I have the system "off" and the fan "on", it does not freeze over

    Hopefully I can get some answers

    Cory
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Jul 19, 2013, 03:36 PM
    If fan is running then either air filter is cloged up or unit is low on freon. With system off ac is not running so it can't freeze
    theoali's Avatar
    theoali Posts: 7, Reputation: 1
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    #3

    Jul 19, 2013, 06:40 PM
    Quote Originally Posted by Joshdta View Post
    if fan is running then either air filter is cloged up or unit is low on freon. With system off ac is not running so it can't freeze
    A friend of mine said it could be a defective thermostat considering the outside unit runs at all times
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #4

    Jul 19, 2013, 06:47 PM
    Doe the outdoor unit shut off with the t-stat set to off??
    theoali's Avatar
    theoali Posts: 7, Reputation: 1
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    #5

    Jul 20, 2013, 06:54 AM
    Quote Originally Posted by Joshdta View Post
    doe the outdoor unit shut off with the t-stat set to off???
    No, the "T" stat is set to off and the unit outside is still going, the only time I've seen it stop is if I flip the breaker
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #6

    Jul 20, 2013, 04:55 PM
    Will the outdoor unit shut off if you turn off the power to the furnace at the breaker? If not, it sounds to me like a contactor welded shut.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #7

    Jul 20, 2013, 06:48 PM
    I agree sounds like you need a new contactor on the outdoor unit
    theoali's Avatar
    theoali Posts: 7, Reputation: 1
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    #8

    Jul 21, 2013, 06:32 AM
    Quote Originally Posted by Joshdta View Post
    i agree sounds like you need a new contactor on the outdoor unit
    The unit outside shuts off if I turn off the breaker
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #9

    Jul 21, 2013, 07:21 AM
    https://www.google.com/search?q=ac+c...ml%3B360%3B360


    Make sure you turn breaker off to indoor and outdoor unit before replacing
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #10

    Jul 22, 2013, 06:22 PM
    Quote Originally Posted by theoali View Post
    the unit outside shuts off if i turn off the breaker
    Does the outdoor unit shut off only when you turn off it's breaker OR will it shut off if you turn off the FURNACE breaker? If it shuts off when the furnace breaker is turned off, the contactor is NOT the problem.
    theoali's Avatar
    theoali Posts: 7, Reputation: 1
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    #11

    Jul 23, 2013, 07:18 AM
    The heat pump unit outside ONLY shutsdown when I turn off it's own breaker. It does not shut down when I turn off the Furnace breaker
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #12

    Jul 23, 2013, 04:19 PM
    Contactor is bad
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #13

    Jul 23, 2013, 06:37 PM
    Quote Originally Posted by Joshdta View Post
    contactor is bad
    I concur.
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