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I have a honeywell thermostat. Has terminals r, w, y, g. I have wires blue, white and red. Help me help me. Have red and white wires attached. And no heat.

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: rewire an old 2 wire thermostat to a honeywell 5-1-1 programmable

I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire

Thanks for your help

Posted on Dec 29, 2008

  • 71 Answers

SOURCE: Help - I am trying to install a honeywell RLV4300A

You will have to have schematics from the old wiring diagram. Then you will have to confirm its consistency with actual old wiring before you can be sure that the wires run to the proper places on the old heater and a/c system. This sounds like a gas furnace and is simpler than a heatpump. Once you know what distinguishes the wires with the same color, you should label them and then you may call them a different color if they were wired with wrong wire colors. You may be in luck if you go to the furnace control box an look at the terminals.. They are usually labeled with a R for Red and W for white and Bl for Blue and B or Black. If you have other colors on these then it sounds that it was wired with wire spare wire by someone who knew what they were doing but neglected to leave a path for someone else follow.
You may be able to use a continuity tester of circuit tester to id these wires that are in question...
ie, once indintified, you can match with the requirements of the new stat.

Posted on Jan 13, 2009

  • 24 Answers

SOURCE: Honeywell RTH 230B Thermostat Wiring

put the jumper back in RC and RH and that should do it.

Posted on Apr 15, 2009

  • 1 Answer

SOURCE: honeywell thermostat

I had the same problem and decided to take a chance and call honeywell customer support. I am shocked, they solved my problem! At least in my situation we found that the blue wire ran the compressor. Instead of hooking up to "blue" on the thermostat, we hooked it up to "white." It works wonderfully now.

Posted on Apr 25, 2009

  • 232 Answers

SOURCE: Wiring

red goes to RC and RH, White goes to W, Green goes to G and Blue goes to Y. iam assuming on the old tstat that Red whent to R White went to W Green went to G and Blue went to Y

Posted on Sep 20, 2009

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1 Answer

Installed a Honeywell RTH6350D...no heat. I think it has to do with the wiring. Old round unit has red, white, and blue wires. Hooked up red and white but am not sure what to do with blue. Help!


normally there are 4 wires.. should be red to red which is 24 volt
green to g which is fan
white to w which is heat
and the blue could be used on y terminal for cooling
see try that and see if it helps....

Nov 29, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

HONEYWELL RTH5100B , THE WIRES I HAVE ARE BLUE, GREEN , WHITE , YELLOW, BROWN, THE A/C WILL NOT COME ON SHOULD I USE THE BLUE WIRE AND IN WHAT ? RC, R, Y, W, G, THANKS


Hi , you need to make sure rc and r are jumpered together.
R=red
G=green
W=white
Y=yellow

Blue is probably the other side of the transformer (24v) and usually would go on "c" if the thermostat has that particular post. To know for sure where blue goes, trace back to the furnace. Blue will be attached to a marked terminal either on a transformer or a circuit board. Hope this helps you.

Jun 24, 2011 | Honeywell Programmable Thermostat Heater

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My heat runs, but does not shut off......my ac is not working..I need help with which wire goes where on the CT87N??? I currently have the blue wire in the W , the red wire in G, the green wire in R,...


I'm not sure if you received my clarification request or not. I will assume that the only colors you have for wire are what you stated in your problem description. Attach the red wire to R, the green wire to G, the white wire to W and the blue wire to Y..

After you have done this, make sure to look in the air handler to be sure the wires are tied to the same terminals inside as there should be a terminal board for them.

I hope this helps you get cool.

Rev

Mar 19, 2011 | Honeywell CT87B ROUND HEATING&COOLING...

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Replacing WHITE-RODGERS manual thermostat with 3 wires ( red, white, blue and installing Honeywell electronic thermostat RTH110B, how do I connect it? The heating is not central, baseboard heating.


I have only seen one Honeywell thermostat that would work with a 3-wire heating system.

I would replace it with a White-Rodgers 1F80-0471. They are about $100, but they are a good thermostat, and they work well with the 3-wire zone valves.

Most other thermostats have the "Y" terminal that you need, but do not control the zone valve correctly.

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- Fairbanks, Alaska -

Jan 30, 2010 | Honeywell Electronic Programmable...

1 Answer

I bought new Honeywell non programmable,letters are different.


If you have a 5 wire thermostat then you have a two transformer system a cooling transformer and a heating transformer.
The cooling transformer wires to Rc - Y - G,
and the heating transformer wires to R - W the R terminal heating would be the #4 terminal from the old stat.

Aug 12, 2009 | Honeywell Electronic Programmable...

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Take white off of Aux, and attach it to L

Feb 16, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Installing Honeywell RTH7000 - I have too many wires!


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

Oct 26, 2008 | Honeywell Programmable Thermostat Heater

3 Answers

Honeywell RTH230B


Normally, you should have 5 color wires: W-White, Y-Yellow, G-Green, R-Red and C-Blue.

The Blue wire is a common from the transformer on older systems, which is probably hooked to RC terminal.

Try this: Remove the blue wire and jump the RC to RH with the red wire and you will be fine. Blue wire should not be needed with the new thermostat.

This should also be stated in the instruction manual.
Hope this helps.

Feb 03, 2008 | Honeywell Programmable Thermostat Heater

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