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    valoscana's Avatar
    valoscana Posts: 1, Reputation: 1
    New Member

    Nov 15, 2007, 08:52 PM
    Wires on honeywell thermostat T8411R
    I was painting my wall and I decided to remove my thermostat off the mounting plate, after I finish I put it back but it didn't work anymore, so I check the wires and noticed a black wire that was loose, all the other wires were in place, so I tried to tight those but a think I accidentally touch the red an blue wire together, so I went to turn the power switch off an d recheck, everything looks fine but when I turn the power switch back on the thermostat have no power, what can I do since I don't know where the black wire come from and whether I short circuit something, this is the diagram on the mounting plate, green G: blue C; red R; yellow Y; white L and W2; orange O; and W1,E,B don't have wires.
    What should I do?:confused:
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert

    Nov 16, 2007, 05:04 AM
    Find the cause of the power interruption. Check the transformer to see if it is working supplying 24 volts.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member

    Nov 16, 2007, 06:00 AM
    If you are lucky, you blew the fuse on the control board. If you need help finding the fuse, see

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