I am removing a Robershaw Mechanical Thermostat with a Honeywell Digital Thermostat. I have a Green, Red, Orange, Yellow, White, Blue wires, also tucked in the wall was a brown wire. This is for Electric Heat/Central Air unit, I can't get it to function once I connect all the wires please help?

<Moved to HVAC>

Type of equipment?
Heat pump gas furnace?
Model of old thermostat?
Model of new thermostat?

The battery went dead in my crystal ball again so I have no idea what you have. That is the reason for the questions above.