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Hello..... trying to install a new Honeywell Lyric T5 Thermostat
It requires a "C" wire ..... or use of the "G" wire work-around as per instructions
But current set-up seems a little odd..... see attached wiring diagram
As shown..... existing wire to Thermostat is 4 conductor
Any help on how to proceed is much appreciated.... ;)
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(http://i65.photobucket.com/albums/h235/T_Bone_1962/Furnace%20Wiring.jpg) (http://s65.photobucket.com/user/T_Bone_1962/media/Furnace%20Wiring.jpg.html)
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Just remove the G wire from the thermostat and connect it to the C terminal on the new thermostat. Then remove the G wire from the furnace and connect it to the C terminal with the other wire going to the AC.
The Y wire from the thermostat should not go directly to the AC. It should go to the Y terminal in the furnace, then go to the AC, otherwise the furnace fan may not start on a call for cooling. You should end up with 2 wires on the furnace C terminal and 2 wires on the furnace Y terminal.
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ok perfect..... I think I got it now..... :)
It should look like this in the end...... correct? ....... see new diagram
Wire colours changed for clarity
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(http://i65.photobucket.com/albums/h235/T_Bone_1962/Furnace%20Wiring%202.jpg) (http://s65.photobucket.com/user/T_Bone_1962/media/Furnace%20Wiring%202.jpg.html)
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Perfect!