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Is there a programmable thermostat for a two wire red and white

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Yes. Many available

Posted on Apr 19, 2017

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Provided you have heat only, yes!

Posted on Apr 19, 2017

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1 Answer

What if I have a Black and White wire and no AC? Where does black go and where does white go? Help?


One is always red red and orange are sometimes crossed together
the other one is white. So connect white to white and black to red and orange.

Nov 10, 2013 | Honeywell Programmable Thermostat Heater

1 Answer

I am installing a rth230b 5-2 programmable thermostat. I have an oil fired furnace. I am only using it to heat and I have red,green and white wires. It is not working. I have the red hooked up to RH...


Yes with out being there to check it for heat only applications you only utilize the red and white wires. It goes to say that red goes on the red terminal R and white to the white terminal W. Should you have done this correctly your heater is now run by the thermostat. Good Job and happy heating!!

Jan 11, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

Programmable thermostat


I am unsure of your question, but if you are just replacing your old thermostat with a new one, then connect the red wire to the Rh or R terminal and the white wire to the W terminal on the thermostat. Hope this helps

Jan 09, 2010 | Honeywell Electronic Programmable...

1 Answer

I tried to insatll my new honeywell programmable. the old t-stat had a white and red wire connected allread. there were 3 other wires unused, G,W,R. I hook up the original R,W wires to the new t-stat and...


The red and white wires go to the R and W terminals on the thermostat. Disconnect what you have now and hook the red wire to the R terminal and the white wire to the W terminal on the new thermostat and see what happens.

Jan 09, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

I had an old two wire system, red and white. gas


Check for a bad thermostat and wire by jumping the red and white wire together at the thermostat. If the unit fires, you have a bad thermostat. If it does not, jump the R and W terminals at the furnace (or where ever the thermostat wires are connected to). If the unit fires you have a bad wire. If it still does not fire, you have an issue with the heating system not the thermostat or its wires.

Dec 06, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Connecting New thermostat with two existing red and white wires


sounds like a heat only system,not all stats work heat only make sure it will(should say on packing)

Dec 02, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

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
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Nov 01, 2009 | Honeywell Electronic Programmable...

1 Answer

Installed my thermostat and the heat keeps climbing where did i go wrong? it is a honeywell Honeywell RTH221B Basic Programmable Thermostat


Make sure red wire is on R terminal, white wire is on W terminal. Also look for a short in the thermostat wire.

Oct 17, 2009 | Honeywell Electronic Programmable...

1 Answer

Replacing a Williamson (White Rogers) Termostat


rh is power for cooling terminal and rh is power for heating terminal connect red wire to rc or rh and there should be a jumper between rc and rh if not install one all other wires are color coded correctly. now the blue wire is not used.

Jan 05, 2009 | Honeywell Electronic Programmable...

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