How do i wire this to my heat pump/gas forced air/ac unit? I have a yellow wire, green wire, red wire,orange wire, light blue wire, and white wire. Not sure which terminals to hook each wire to.

SOURCE: Honeywell RTH230B works on AC not on Heat

check wiring to furnace check wire hook ups on board match letters and colors sometimes installer use what ever wiring they chose on letters

SOURCE: Installing thermostat - extra wire?

you have to go down to your furnace and follow the thermostat wire ...it connects to a terminal strip or fan centre...the color doesn;t really matter...installers mix and match all the time....look at the furnace wiring and mark it down...Red on "R"...Green on "Y" whatever it is...and connect it accordingly upstairs...if you only have 4 thermostat wires downstairs you will need a jumper wire between RH and RC...if you have 5 wires you will see 2 wires on "R" at the furnace.,...and connect either to RH and RC at the thermostat

SOURCE: Need wiring diagram for Honeywell RCT8100

The old thermostat has a second stage heat which is W2. The new one doesn't have second stage heat.
The wiring your describing on the old thermostat is telling me you have a heat pump with second stage heat and the new thermostat is for air conditioning only. You will need to get a thermostat for a heat pump.

SOURCE: Honeywell RTH230B cooling problems...

I printed out the instructions for your thermostat. It looks like you should have the following.

There should be jumper wire between Rh & Rc

Red wire to Rh or Rc whichever is easier since there is a jumper. This is the hot wire and all the thermostat does is connect to route it to the components needed for heating or cooling.

Blue wire, tape it up and don't use it. There is no spot on this thermostat for it. It is only used on thermostats that are powered by the transformer.

White wire to W. Powers the heat relay

Yellow wire to Y. Powers the cooling contactor

Green wire to G. Powers the indoor fan relay

There is a black jumper on the back of the face plate. Look at section 2.4 Setting J2 Jumper in the installation instructions. Make sure you have it in the right position for what you have. If you don't have them just google them.

Hope this helps.

Robert Moller

• 1524 Answers
• Posted on Dec 08, 2010

SOURCE: So I switched out a Simple Comfort 2200

Here is the manual with the wiring. Never worry about colors rather terminals.
http://customer.honeywell.com/techlit/pdf/PackedLit/69-2340ES.pdf