I found six wires when I took out my old thermostat - 1 green, 1 yellow, 1 white, 1 blue, 1 red and 1 black. The thermostat I bought is the Uberhaus TH3200. It only takes 5 wires and the instruction does not tell me what to do with the sixth wire - the black. I capped it. The heat comes on, but I realized that the fan keeps blowing. Has this something to do with the black wire? Where should it go?