I have a rth3100 thermostat which replaced the one that was identical to the one that came off my son took off the old one while i went out to get the one that was going replace the old he was trying to make me happy but he forgot to label the wires which is 6 wires a white wire ,a red ,yellow,green ,brown and blue but i have on my thermostact the letters e, aux, g, y, o, l, r, b, and c i connected the white wire with the aux and the e and the y with yellow and g with green and the r with red but i don't know were to hook up the brown nor the blue wire because with the old one all wires was connected.
Lori