Heat pump thermostat replacement

The Orange wire for the reversing valve and used with a Heat Pump
If you have a heat pump, then yes. If you have a gas furnace then no. If you have a HP and the reversing valve is not connected, then you might just be using the emergency electric heat strips. :-o

most likely you will have to replace thermostat...if you go to honeywell.com they may still have the thermostat but it is possible the stat has become obssolete and will require a totally different one... for the time being if you need heat you can manually jump it but it will not shut off until you take the jumper wire back off... jump out the "r" terminal and the "w" terminal and should bring on the heater until you can get it replaced... if you have any problems with installation repost with brand and heat pump or straight cool one of us will help you out....good luck to you..

Honeywell Chronotherm thermostats have always had a great reputation for longevity and reliability. They are also much more user-friendly than the other types of programmable thermostats out there. Make sure you get one that states 2-stage heat, heat pump. T8611G will offer that for you. There are many out there that claim to be suitable for heat pumps; however, they do not have the ability to utilize your auxiliary heat strips (2nd stage of heat).
Before you attempt to replace, be sure to write the wire colors and their corresponding terminal marking on a sheet of paper........of your old thermostat. This is very important to make it easier to hook up the new thermostat. Also, before you disconnect the wires, be sure to shut off the circuit breaker to your air handling unit. You can ensure you have the right one by putting the fan switch in "ON". When you turn off the right breaker, the fan will stop running. :-)

I hope you find this information to be very helpful to you. Please don't forget to leave a rating.

More information would help but I believe that you are trying to hook up a programmable thermostat to your old heating system which is what? Oil forced air, heat pump, gas? Give me more info and I think that I can help you.

hardrocko

Open up the propane furnace and see what color wires are hooked to the gas valve or circuit board. If it has a circuit board, note which color is on the R terminal and W terminal, Connect the the thermostat the same way. Most likely the yellow wire powers your A/C so you can hook that one to the Y terminal.

sounds like you have a heat pump the w2 on old thermostat is for a second stage heat. If you can give me a little more information on type of system you have (forced air furnace with heat/cool, Heat pump or boiler)? How many wires are on old thermostat? Is it a no programmable or programmable? How old is the furnace?

HONEYWELL WEBSITE:
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions

you can use a 5 wire heat pump thermostat.

Must be heatpump thermostat
red is 24 volt power
white is aux/emergency heat these usually will need to be jumped together
Green is fan
yellow is compressor contactor
blue is reversing valve
you just don't have a common so some thermostats will not work.
get one with batteries

check to see if the B terminal is on the new t-stat if connect to it , but this terminal refers to heat pumps and is normally use to energize the reversing valve on the outside unit and not used on ac units , but normally the tag O/B is the same terminal on therostats

try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.