Im replacing my honeywell with a hunter 44110 the honeywell has 6 wires w1 to white, w2 to blk, G to green, RH to Red, Y2 to yellow and Y1 to orange, the hunter only has G RH RC Y W

What is -the outside?
Heat pump, gas, electric heat combination?
You may need to back track, double check the Honeywell configuration jumper or software settings for your type of heating used.

R Red 24 volts coming from equipment to stat
W White First stage heat (could be W1)
W2 Second stage heat
Y Yellow First stage cooling (could be Y1 on your stat)
Y2 Second stage cooling
G Green Blower
C Common (Neutral)
B Reversing valve for heat pump
O Reversing valve for heat pump

If you have singles transformer system. Rc and Rh will be connected.
If you have 2 separate systems. i.e. Boiler heat and Central Air. Boiler Red to Rh and C.A. red to Rc.

Hopefully you have heat pump with electric resistance back up Y to Y1. R to Rc/Rh. X to C. Everything else should be same

From Honeywell : "If your old thermostat had Six or more wires, the replacement you have is Wrong!"

Wiring on the old one, "X", probably a brown wire will not be used on the new stat. If it's a blue wire, this may be your common. "E" and "W2" probably wired together with a white wire, this controls electric heat. "R" with a red wire, this is 24 volt power. "O" is an orange wire, this is the reversing valve. "Y" is a yellow wire, this is the contactor. "G" is a green wire, this is the blower. This pretty accurate? On the new stat, the jumper should be connecting "RH" to "RC/R", leave it in and wire the "R" from your old one to either terminal. White from the old one will go to the "E" of the new one. If your electric heat doesn't work after the install, you may need to jumper the "W1" and "W2" with the "E". "O" wires to "O". "Y" from the old one wires to the "Y1" of the new. "G" wires to "G". "C" on the new one is common. Usually a blue wire goes here. If "X" on the old one was blue, plug it into the "C". If it was brown, I'd suggest not using a common, and installing batteries. Hope this helps.

Hello,You forgot to wire the O terminal w1 witch is the reversing valve.It is important to check if old stat is using O or B in witch case B terminal=w1 leaving O unused.

Your original wiring configuration seems to indicate that you have an air conditioner (not heat pump) and either a gas or electric furnace. If this is the case you may need a different thermostat for your application.

W1 IS HEAT ON WHITE WIRE X IS COMMON NOT USED Y2 IS SECOND STAGE COOLING ,NOT USED Y1 IS COOLING YELLOW WIRE TO AC G IS GREEN WIRE FOR FAN RC-RH GETS JUMPED AND CONNECTS RED WIRE.
RED WIRE AND WHITE WIRE TURNS HEAT ON RED AND YELLOW TURNS ON AC RED AND GREEN TURNS ON FAN AC MODE CONNECTS YELLOW RED GREEN

There is no real color code for wiring but the standard is red wire to r, yellow wire to y,white wire to w, green wire to g, blue wire to c. since there's no c on your t- stat its probably battery operated, but in your case im betting white wire to w, and blue wire to g.

Thanks for your Question,
B- is your common leg,
RH- is your hot to heating
RC1- you will not need
RC- you can use if you remove the jumper for cooling
Y1- you will not need
G- is your fan
O is not needed, wires should be hooked in as follows,
RH- red wire, heating
RC- Yellow wire, Cooling
G- Green wire, Fan
B- Blue wire, for common leg, this one might be a different color so make sure at the furnace which T-Stat wire is connected to Common, you should check all the wiring at the furnace to make sure this pattern of wiring is followed, it should be standard practice to hook them up this way, but not all installers do it, thanks again, please rate this,
mr.grzz