hello everyone. i just installed a digital thermostat. while reading
the instructions i missed the sentence telling me to label the wires. i
know. i'm a moron. i assumed they were color coded (i.e. r=red,
o=orange, w=white etc.). can this foul up be salvaged? i greatly
appreciate your help.
Clearly, you should have noted the color and letter terminal the wires were
attached to on the old stat. You haven't mentioned what the thermostat is
controlling, however at this point, you'll probably have to determine what
each wire is attached to on the other end
If there wasn't a jumper between RC and RH, you have a two transformer
system. Two wires will operate the heat and three will operate the cool. The
connections for heat are RH and W. If you touch the red and white wires
together, see if the furnace fires up. If so, connect those two wires to the
new stat rh and w. The green wire should go to the G terminal for the
cooling fan and the yellow should go to Y for the a/c condenser, and
hopefully the orange wire is the RC for the cooling. After connecting the
two heat wires, just touch the orange to the green wire and see if the
blower comes on. If so, I think were good
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