Okay guys I just moved into a new place and the thermostat is way off. It's a mechanical one, so today I went out and bought a honeywell programmable one and tried to install it. The problem is the wiring which I have no clue.

What is included in the honey well is:

Y
G
W
Rc
Rh

On the mechanical one the wiring is different:

Y
G
W
O
R

Okay this is what I have tried:

Y - Y
G - G
W - W
O - Rc
R - Rh

So I wired it that way and it didn't work. So I tried to switch the orange and red, so it was O - Rh and R - Rc. Now that gave off heat when it was on cool.
So I was messing around with it and I know Red is some kind of power.

If anyone could tell me how to wire this, it would be greatly appricated. I've been trying for a few days now and its fustrating.

Thx fellas

Looks like you have the wrong thermostat. You have a heat pump? Does the Honeywell say on the packaging that it is compatible w/ a heat pump?

"o" is usually part of a heat pump system thermostat for the valve coil.

Honey well has a print design for their system... give a model number... so we can look up the system and give the instruction...