Is the blue cable on the pic the "common"? NEW 5-wire Thermostat?
Ok, I have currently this thermostat:
http://www.homedepot.com/webapp/wcs/stor ...
Here is a pic of the current connections
http://img208.imageshack.us/img208/5561/ ...
* As you can see,
You may have to start over with the wiring.
You need to get to the indoor unit's low voltage terminal board to see how things are wired in.
I am going to assume your system is not a heat pump.
If you have a furnace and airconditioner

