Question about Honeywell Focus 6300B 5-2 Days Programmable Thermostat Heater

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Need to hook up a honeywell rth2310b with only 2 wires!

Don't know where to hook them to

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In some situations the wall plate has no markings, there are just two terminals hooked up to the control wire for the heater. I just installed this thermostat on my gas fireplace. I connected the black wire to the Rc terminal and the white wire to the W terminal. With the thermostat set to heat it works perfectly. Thanks to johnptaylor for the help!

Posted on Jan 16, 2010

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The manual/schematic does not help in this situation.

If you're hooking up for the summer (A/C) use one white (white in my case) to the Y pole and the other (black in my case to the RB pole. Do the same on the controls for the A/C at the source (you'll have to figure out that for yourself if the poles are labelled different as mine are... depends on the furnace manufacturer where the A/C controls tie in.

Now, I have to switch back to heat.. For heat, if I remember right it's white to W and black to RB. Again, in my case, I have to change it at the furnace for the controls there as well since I swith from A/C to heat... back and forth as required.

It'd be much easier with only heat, central air means I have to change it twice a year or run new 5 wire cable (which I'm thinking about doing).

Good luck. It's a good unit.

Posted on Sep 30, 2009

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There should be a wireing diagram in the instructions or on the inside of the back when you take it off to hook up your wires. i know that they typically offer you more places to hook wires than you have wires and the colors are different. Just follow their instructions and it will be fine.

Posted on Jan 26, 2009

  • Michel Laprise Sr Dec 11, 2010

    I read the diagram and the instructions; and the solution on the blog is less confusing. In my case, I only had a black and a white wire and I managed to make it work after reading krys and johntaylor's comments. One must mention that the jumper between the Rc and Rb terminals must remain, otherwise the furnace will not respond.
    Thanks to tinytrees as well.


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SOURCE: I bought a rth2310b honeywell

on rh and w

Posted on Jan 26, 2009

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1 Answer

Rth2310b wiring

More than likely, this is what you have:

Red- Power- (RC/RH)
White- Heat- (W)
Green- Fan- (G)
Blue- Cool- (Y)

Usually, the only times you need more than 4 wires are:

1. You have a HeatPump system.
2. Your new digital thermostat does not use batteries, which then you have to have a common wire to power the thermostat.

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Have a pellet stove and a thermostat can be hooked up to it. there are only a place for two wires. but i don`t know where to wire them on the thermostat rth2310b

You will use thermostat wire and use the red and white wires. Terminals should be marked (R) this being red and(W) this would be the white. Follow the same way on the thermostat and this should do it for you. Good luck!

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I just bought a Honeywell 5.2 Day RTH2300B Programmable thermostat to replace my old mercury thermostat for my gas fireplace. When I took of old thermostat it only has two wires. A white wire and a black...

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.

Dec 06, 2010 | Honeywell Focus 6300B 5-2 Days...

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Honeywell RTH2310B Programmable Thermostat

i would check to see if thier is a jumper between RC and RH on the stat if no and the red wire is hooked to RH then you need to add a jumper to RC

Sep 19, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Wiring for a Honeywell RTH2310B

Go to
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

Jan 10, 2009 | Honeywell Focus 6300B 5-2 Days...

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