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    eliz310's Avatar
    eliz310 Posts: 22, Reputation: 1
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    #1

    Apr 25, 2009, 03:06 PM
    Installed new thermostat, now a/c outside unit will not run
    We installed a Honeywell RTH6400 thermostat in January. We now need a/c & outside unit will not come on, inside unit runs. When we installed this we thought everything was hooked up right, but who knows. We've pulled the cover off the thermostat & we have a blue wire that is taped, should it be hooked up to something? Is this a different issue all together?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Apr 25, 2009, 03:16 PM

    Do you have a jumper wire between rh and rc?
    eliz310's Avatar
    eliz310 Posts: 22, Reputation: 1
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    #3

    Apr 25, 2009, 03:18 PM

    Metal jumper wire is connected to R & Rc.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #4

    Apr 25, 2009, 03:19 PM

    Do you have a volt meter?
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    eliz310 Posts: 22, Reputation: 1
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    #5

    Apr 25, 2009, 03:20 PM

    No, My father does, but not here. I just looked & the red wire is on Rc. Is this correct?
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    Joshdta Posts: 2,549, Reputation: 45
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    #6

    Apr 25, 2009, 03:23 PM

    Yes as long as it has a jumper. Set the t-stat so the ac should come one. Then go outside and take the 2 screws holding the panel to the electric on the ac. Right where the power goes in. look for this contactor.

    http://yueqing-shi-shinaidi-electric...ges/283101.jpg

    See if the two bottons in the middle are pushed in.
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    #7

    Apr 25, 2009, 03:25 PM

    Did you check the breaker to the outdoor unit?
    eliz310's Avatar
    eliz310 Posts: 22, Reputation: 1
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    #8

    Apr 25, 2009, 03:25 PM

    Checking will be right back.
    Joshdta's Avatar
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    #9

    Apr 25, 2009, 03:26 PM

    Rember that is 220 volts so be careful you can push those buttons with a screw driver.
    eliz310's Avatar
    eliz310 Posts: 22, Reputation: 1
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    #10

    Apr 25, 2009, 03:27 PM
    Not finding where the power goes in.
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    eliz310 Posts: 22, Reputation: 1
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    #11

    Apr 25, 2009, 03:29 PM

    We reset breaker to unit earlier & no success.
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    Joshdta Posts: 2,549, Reputation: 45
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    #12

    Apr 25, 2009, 03:30 PM

    Should be on the back left or the back right of the unit closest to the house.
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    eliz310 Posts: 22, Reputation: 1
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    #13

    Apr 25, 2009, 03:31 PM

    Already tried resetting the breaker..
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    eliz310 Posts: 22, Reputation: 1
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    #14

    Apr 25, 2009, 03:32 PM

    Is it a the entire back of the unit?
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    #15

    Apr 25, 2009, 03:39 PM

    Not sure, what brand do you have?
    eliz310's Avatar
    eliz310 Posts: 22, Reputation: 1
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    #16

    Apr 25, 2009, 03:40 PM

    Lennox
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    #17

    Apr 25, 2009, 03:42 PM

    Yes some lennox and trane units you have to take the entire pannel off.
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    eliz310 Posts: 22, Reputation: 1
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    #18

    Apr 25, 2009, 03:43 PM

    Ok, will do
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    eliz310 Posts: 22, Reputation: 1
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    #19

    Apr 25, 2009, 04:03 PM

    There is only 1 black button & it seems to be pushed in
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    Joshdta Posts: 2,549, Reputation: 45
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    #20

    Apr 25, 2009, 04:05 PM

    OK if it is pushed in then your t-stat is working corectly. Your problem is with your main power. 220 volt. Is there a outside disconnect for the main power on your house?
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