5-wire thermostat - LOST a few wire labels. HELP!
I am installing a programmable thermostat (upgrading from a previous programmable that wasn't to our liking.
When taking the old thermostat off, I noticed 4 of the 5 wires were labelled. That's a good thing. HOWEVER, when I took the old baseplate off, 2 of the labels fell off (not sure from which wires.
My new thermostat requires:
RC
RH
G
Y
W
The wires from the wall are:
G - green
W - white
? - orange
? - black
? - red
So, I need to "map" RED, ORANGE, BLACK, to RC, RH, Y.
Can anyone help me? I am at a loss here. The house is about 4 years old. If I can't get an answer here (or how to TEST which wires are what), I might ask a neighbour in the same style of home (same contractor) to see their wires which are hopefully labelled.
THANKS!