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Thermostat wires My very old thermostat died and I am trying to install Honeywell 6300B. Does anyone know about the wiring, the old system fell off before I could tag the wires! I know the R is the power but I have separate termials for Rc and Rh so I cannot run the wire to both. I do not have a heat pump. The yellow wire is a neutral and so is the white but do they go in the Y and W slots? Can anyone help?
It already has a jumper between rc and rh and there is no common. there is only g, w, y, rc, rh.It already has a jumper between rc and rh and there is no common. there is only g, w, y, rc, rh.
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i would open the furnace and find where the wires are connected inside the panel and you should be able to identify which color wire is hooked up to each terminal.
I just installed a Honeywell 5.2 Day RTH2310B Programmable thermostat and I had to deal with the same situation: 2 wires, one white one black. After reading the edvice in one of the blog, the solution that worked for me was: BLACK ON Rc terminal and WHITE on W terminal. My furnace is running fine now. Hope it helps.
Hello.The thermostat needs a COMMON wire.The letter C on the back of the thermostat.In the unit it runs there is a COMMON connection for that reason.I hope there is a spare wire strand to use because a lot of thermostats don't need a common to work (uses battery)but honeywell does.
Hi,
If you have a single stage furnace, you do not need that wire....if you have a two stage, then you cannot use that thermostat because it will not do 2 stage...
you are likely missing a Jumper wire between RH and RC ....if you have 4 thermostat wires , usually Red,White,Yellow and Green...then you will req the jumper wire...look at the old thermostat and see if it had 1...install this jumper on the new one....obviously also make sure you have the wires connected to the appropriate terminals....you may also have blown a small fuse in the furnace while installing it if you did not turn the power off first or hooked the wires up incorrectly
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
The thermostat is a low voltage circuit (24 volts) most of the newer heating systems have a fuse for the low voltage controls. If you are having to re-set the high voltage circuit breaker, then you have something else wrong. When does the breaker trip? while its running or after it shuts off?
It already has a jumper between rc and rh and there is no common. there is only g, w, y, rc, rh.
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