http://sds038.aisites.com//files/AC_Heat.jpg

Yeah I have tried most of the solutions I have read about on several of these pages, yet no luck.

I have determined that the Blue, Yellow, Orange, Red, White wires go to the AC and
Additionally the Green, Red, White, Blue wires go to the Furnace.


So... how should I connect a five wire programmable thermostat?


Does anyone have a clue?

Thanks.

You did not give us the info on the new thermostat so its hard to say. It looks from the pic you sent you have a heat pump. You will need a heat pump thermostat that will energise the reversing valve in the cooling mode for it to work.

Looks to me like you have the wrong thermostat