[diydummy]

My old thermostat is a Carrier and says "Heat Pump System Control" it does not have a model # and is probably 20 years old. I have a new thermostat which is a LUX TX9000.

I removed the old thermostat and there are eight wires all of which are connected
They are as follows:
w2 - Brown
C - White
G - Green
R - Red
E - Blue
L - Black
O - Orange
Y - Yellow

The new thermostat has the following connections:
Y, O, G, W, B, RH and RC

I am assuming that Y, O, and G are for yellow orange and green , but what do I hook the other wires up to?

[ballengerb1]

The Rh and Rc get jumpered to each other and then to the red if you have just one 24 vdc transformer for your stat.

[Stratmando]

I would Turn Of power and look inside Air handler, and see if all wires are being used.
And wires that are used, what do they control, May have a diagram on or in unit.

[acetc]

You have the wrong thermostat, you have two stage heat and this new thermostat does not have this capability. Mike