Question about Heating & Cooling

3 Answers

Installing a Honeywell Programmable Thermostat with my Bryant Puron HVAC System

I hope someone can assist me. I have purchased the Honeywell 7-day Programmable Thermostat, Model # RTH7500, to install for my Bryant Puron HVAC system. My system is a split unit, and has electric a/c and natural gas heating and is six years old.
The wiring on the original Bryant thermostat is a follows: 2 red wires connected to the R terminal; 1 yellow wire connected to the Y/Y2terminal; 1 green wire connected to the G terminal; 1 blue wire and 1white wire connected to the C terminal; and, 1 white wire connected to the W/W1 terminal. For the record, one of the red wires that is connected into the R terminal and the white wire that is connected to the C terminal both originate from a thicker beige/brown wire that has been stripped so the two individual wires can be separated into different terminals.
In the installation instruction guide that came with the Honeywell thermostat, it says that if you have more than one wire connected to the C terminal, you should tape the ends with electrical tape and(written in bold and underline) "do not connect them".
I have installed the thermostat but could not get the unit to cool --so I reinstalled the original thermostat (I will describe what I have done below). I can get it to the point where the fan runs and the heat works, but I cannot get it to work in the "cooling" mode.
The Honeywell thermostat has an R terminal and an RC terminal that are connected with a "jump connector". On my first attempt, I connected both "R" wires into the "R" terminal and left the jump connector in place. As described above, the fan would run and the heat would work,but it would not work in the cooling mode. On my second attempt, I thought, hmmm... one of the red wires comes from the same larger wire as the white wire that is connected to the C terminal, so maybe it would constitute the Rc wire. So, this time, I removed the jump connector and connected the first red wire in the R terminal and the second into the Rc terminal. This time, nothing. No power to the fan,no heat, no nothing. So, I switched the two around, putting the first red wire into the Rc terminal and the second red wire (the one that comes from the same larger brown wire as the white wire that is connected to the C terminal on my original unit) into the R terminal. Again, I had power to the fan and the heat would work, but the unit would not work in the cooling mode.
I have described all the wiring that is available. So, does anyone have any suggestions as to what might be my problem? In my logical,reasoning mind, it seems like this should be a simple fix -- if the old thermostat works fine in all modes, I should be able to get this new,programmable thermostat to work, too.
I called the Honeywell technical support line. The technician instructed me that I might have to go to the unit and get a detail of the wiring from the source. I went outside to my units, and I cannot find where to look for this.
I am a DYI-er and can do almost anything, but this has me stumped. Please help if possible.
Thank you,
Mary Sue

Posted by on

  • msjones58 Aug 19, 2008

    I have both the Operating Manual (for which the link was posted in the response from the expert) and the Installation Guide, both of which came with my thermostat. However, as is stated in my lengthy original post (which does provide distinct details regarding my problem), these guides do not address the issue that I am having. Therefore, I would like further assistance addressing the direct problems that I have stated in my original post.
    Mary Sue



3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 726 Answers

The wiring should be the same as the old one hook up same as the old wires there is nothing diffrent

Posted on Aug 19, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 2,920 Answers

I would think that the wires would connect up the same way they came off the old thermostat..i would try to do that first connect them all the same as they came off the old one and see what you get from that. it stands to reason that if it works with one thermostat wired in a certain way it should work with the new one the same way.try it and dont always have to follow directions when it comes to hooking them up

Posted on Aug 18, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 163 Answers

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I am unable to connect to the Internet even though the email address and password are accurate. This just happened.

Trouble Shooting - - FAQs ' FWD - Honeywell
How do I delete that thermostat from my Lyric app? If you've moved and ... How do I change the email address I use to manage my Lyric? If you already have a ...Missing: programmable ‎accurate

Wi-Fi 7-Day Programmable Thermostat ' Honeywell

HoneywellThe Wi-Fi 7-Day Programmable Thermostat is designed for the way you live ...Features such as Smart Response and precision temperature accuracy bring ... your home heating and cooling system, and then remove your existing thermostat. .... Whileconnecting to Wi-Fi, my model RTH6580WF or TH6320WF thermostat is ...

FAQs - Total Connect Comfort

Dec 29, 2015 | Honeywell Programmable Thermostat Heater

1 Answer

How do you program the Honeywell RTH 2410B1019 thermostat for a heat pump.

5-1-1 Day Programmable Thermostat - Honeywell

HoneywellSet the Honeywell 5-1-1 day programmable thermostat to your maximum comfort settings. Works with heat pump systems. Buy now!

Nov 18, 2015 | Honeywell Heating & Cooling

1 Answer

I have a honeywell T87K round thermostat (2-wires R and W). I just purchased a honeywell WIF 7-day programmable thermostat RTH6580WF. How do I install the new thermostat? Is it even possible?

Programmable is in unit nothing to do wire fto urnace two wires cut furnace on and off you should have instructions to use two wires with your instructions

Aug 18, 2015 | Honeywell T87K1007 Mechanical Thermostat...

1 Answer

Manual honeywell programmable thermostat

Follow the below link, select thermostat on the upper box, then type CT3600 on the lower box.

Oct 09, 2012 | Honeywell CT3600 7 Day Electronic...

1 Answer

I have a Honeywell programable RTH230B. I changed

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
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.

Jan 08, 2010 | Honeywell Focus 6300B 5-2 Days...

1 Answer

New rth2310 themostat does not blow cool air

I don't believe you're going to get the new one to work -- sounds like it doesn't have enough control wires to operate your HVAC system. If it is designed to operate a 7-wire system, the documentation should show how to hook the 4-wire tstat so it will work.

Apr 21, 2009 | Honeywell Focus 6300B 5-2 Days...

2 Answers

Honeywell thermostat

If you have a forced air furnace with an air conditioner attached make sure you have a jumper wire between Rh and Rc. If the Bryant thermostat had a wire hooked up to C you do not want to hook this up to Rc. Just cap it off and put it back in the wall or disconnect that wire down in the furnace.

Aug 10, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Installing a honeywell CM900 wireless programmable thermostat

the analog unit uses just two wires for heat. red - white. there is a heat anticipator setting that must match the burner current. check your programmable specs and follow instructions.

Dec 04, 2007 | Honeywell Programmable Thermostat Heater

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

256 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3239 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides