I was changing my "Carrier"thermostat to a "honeywell" thermostat. I think a few of the wires touched each other (Blue, green, yellow, white, red) and it burned a fuse out. The thermostat screens are both both blank now, (I tried switching the honeywell back to the Carrier) and I can't controll my AC nor my Heater. I loctaed my fuse box but none of the fuses are connected to the thermostat>>>How do I fix the thermostat? It does not use batteries>