HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Connect one-on-one with {0} who will answer your question

I am trying to wire a new wifi thermostat to my old oil furnace.

Customer Question

I have wires labeled from...

I am trying to wire a new wifi thermostat to my old oil furnace. I have wires labeled from the old thermostat that are G, B, O, R, Y, W. The new thermostat has terminals labeled C, K Rc, R, W-O/B, Y, G, W2-Aux/E, Y2, L

There is no C terminal on the furnace. The new thermostat requires C wire for startup. Is there an alternative wiring configuration I can use to connect the thermostat.

Submitted: 8 years ago.Category: HVAC

Show Less

Ask Your Own HVAC Question

Answered in 7 minutes by:

1/11/2014

HVAC Technician: Douglas, HVAC Technician replied 8 years ago

Douglas, HVAC Technician

Category: HVAC

Satisfied Customers: 3,131

Experience: Manufacture Rep for Major Brand, Technical Trainer, NATE

Verified

Hi, I'm Douglas and I am here to help you resolve problems with your heating and cooling equipment.

Do you have air conditioning on this furnace?

Customer reply replied 8 years ago

If you mean does the A/C run on the same thermostat, the answer is yes

HVAC Technician: Douglas, HVAC Technician replied 8 years ago

Ok... in your furnace, you should see the wires that control the outdoor unit. These are fairly easy to find as they are usually tied to the refrigerant lines then drop down into the furnace. In most cases there are two wires. One should tie to the yellow thermostat wire? Do you see this?

Also, what is orange from the thermostat connected to in the furnace?

Customer reply replied 8 years ago

Give me a minute to look.

HVAC Technician: Douglas, HVAC Technician replied 8 years ago

Take your time.

Customer reply replied 8 years ago

I hope this is what you are talking about. I see 2 wires that were originally coated in a brown coating. All the rest are in white coatings. The red is at a terminal with the yellow. The other one is white and it ties into a terminal with another white one.

HVAC Technician: Douglas, HVAC Technician replied 8 years ago

Ok the white with the other white are Common, your C wire from your thermostat can tie in there.

Did you see what your old orange wire connected to from the thermostat in the furnace?

Was this answer helpful?

Yes

How JustAnswer works

Describe your issueThe assistant will guide you

Chat 1:1 with a hvac technicianLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related HVAC Questions

I just asked if there was a technician available now and you

I just asked if there was a technician available now and you sent me to the page that shows my question. Is there a technician available now? … read more

Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

12,587 satisfied customers

I have a water furnace connected to an old Honeywell

I have a water furnace connected to an old Honeywell thermostat from aprox 2001. Wires on old thermostat are C, L, R, Y1, W, Y2, O, G and new Honeywell thermostat is a 9000series which does not have a… read more

hvacdave84

Lead Service Technician

Vocational, Technical or Trade School

123 satisfied customers

My wiring id furnace is blue-E, yellow-Y, orange-O, brown-T,

my wiring id furnace is blue-E, yellow-Y, orange-O, brown-T, red-R, black-W2, white-W1, green_G … read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

Reolacing a thermostat which has and all were occupied. a C

Reolacing a White Rogers thermostat which has and all were occupied. a C (weird because it has batteries and the thing didnt work without the C), L W2 , & R, G, O/B , Y. WITH a Honeywell Wifi thermost… read more

BillyHvac

Journeyman Service Technician/Inspector

State Licensed Mechanical Contractor

16,758 satisfied customers

Have honeywell 9000 wifi thermostat where do I put the w and

Have honeywell 9000 wifi thermostat where do I put the w and w2 wires. Already have emergency heat wire and o wire.… read more

airheatman

Heating & Air Conditioning Contractor

6 years college

15,689 satisfied customers

I need help installing a new Honeywell WiFi thermostat. I'm stuck on the wiring. The

I need help installing a new Honeywell WiFi thermostat. I'm stuck on the wiring. The old thermostat had G, Y1, R, and two more wires wrapped together and set in the W1 terminal. Those wires are blue a… read more

Appliance Guru

23,629 satisfied customers

. I have a Goodman heat pump model ssz14 2 ton with

Hi. I have a Goodman heat pump model ssz14 2 ton with letters r,w,y,o,c. five wires from h.p. to furnace tied at pump. r to red,w towhite,y to green,o to ornge,c to black. Furnace is a Keeprite nat. g… read more

airheatman

Heating & Air Conditioning Contractor

6 years college

15,689 satisfied customers

Hi I just bought a new Therm. and it does not have a connector

Hi I just bought a new Therm. and it does not have a connector for my "o" wire. What is the "o" wire for? The connectors on the new Therm list: Y2, w2, G, W, not used, Y, R, RC conventional L ,aux/E, … read more

airheatman

Heating & Air Conditioning Contractor

6 years college

15,689 satisfied customers

I had the RUUD protech model 520. It has wires codes R, O,

I had the RUUD protech model 520. It has wires codes R, O, B, Y1, E, Y2, W2, G, C, L. I NOW HAVE A HONEYWELL programmable thermostat RTH9580, this unit has C, K, RC, R, W-O/B, Y, G, W2-AUX/E, Y2, L. W… read more

type2technician

253 satisfied customers

I have a Bryant Thermidistat (about 10 yrs old) connected to

I have a Bryant Thermidistat (about 10 yrs old) connected to an AC/Heat Package. It was a high end Purion system with 2 stage compressor. The thermostat has failed and I would like to hook up a Honeyw… read more

jHVAC

131 satisfied customers

I have a RUUD Air Handler UHPL-HM4824JA and a heat pump. The

I have a RUUD Air Handler UHPL-HM4824JA and a heat pump. The wires it has wires for W1, W2, Y1, Y2, B, R, C and G. I replaced the old thermostat with a Honeywell RTH8580WF. It has connections for RC, … read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

old thermostat is TA32H01 on a water furnace it is using C

old thermostat is TA32H01 on a water furnace it is using C R L G O W Y1 my new tstat is a nest it has different hookups wondering which one to use? on the nest it has Y1 Y2 G ob Rc W1 W2aux C * Rh… read more

Scott

Self Employed HVAC Service Technician

Associate Degree

401 satisfied customers

Replacing a Honeywell Chronotherm III with a VisionPro 8000.

Replacing a Honeywell Chronotherm III with a VisionPro 8000. Oil heat and electric AC. The Chronotherm controls 1 zone but also is the master to a 2nd zone in terms of switching from heat to coool to … read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

Dear Sir, I am currently trying to replace an older model

Dear Sir, I am currently trying to replace an older model HoneyWell Thermostat with a newer model HoneyWell Thermostat (RTH7600D). The old thermostat's wiring is G, C, R, L, W1, W2/E, O. The new therm… read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

Im replacing a Braeburn thermostat (with an emergency heat

I'm replacing a Braeburn thermostat (with an emergency heat switch) with Honeywell RTH6350/6450. I'm having trouble figuring out the wiring configuration. The Braeburn configuration is as follows: R O… read more

M Oglesby

Vocational, Technical or Trade Scho

2,038 satisfied customers

Hello Presently I have a heat pump furnace and Im trying

Hello XXXXX have a heat pump furnace and I'm trying to change a "Water Furnace" thermostat with a Honeywell RTH8500. Presently the Water Furnace has this configuration R Y/Y2 G C W/W1 O/W2 Y1 L The Ho… read more

Rick Mather

HVAC Tech

Vocational, Technical or Trade Scho

3,631 satisfied customers

HAVE A LENNOX HP10 HEAT PUMP WITH OLD SLIDER THERMOSTAT AND

HAVE A LENNOX HP10 HEAT PUMP WITH OLD SLIDER THERMOSTAT AND WANT TO CHANGE TO A NEW HONEYWELL 8320 PROGRAMMABLE. IN THE OLD SLIDER I HAVE THE FOLLWONG TERMINALS. OLD NEW X F V M Y A L VR R E CAN YOU T… read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

Hey all...a little help I have a heat pump system in new

Hey all...a little help? I have a heat pump system in new house and trying to switch wall thermostat to programmable one so bought Honeywell RTH7500D. The wires out of wall to old thermostat are G to … read more

gotoman for ac

HVAC Service manager and owner

Associate Degree

5,490 satisfied customers

Disclaimer: Information in questions answers, and Show Less

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.
JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.
Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!
AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.
GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.
JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.
EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.
RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Brian HVAC Guy

HVAC Technician

1,029 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Jerry

Service Technician

576 satisfied customers

HVAC Technician. Hearth Products Specialty

A-1 Tech

Service Manager

526 satisfied customers

I have been in the HVAC business for over 40 years.

Thehvacguy

LIC HVAC,Plumber

426 satisfied customers

Certified HVAC Universal Technician,Lic plumbing contractor, 28 yrs exp

Drcool

HVAC Technician

348 satisfied customers

i have been an A/C tech for the past 30 Years. working on window types, split type, and package

N4IEA

NATE Certified; HVAC Technician

227 satisfied customers

Retired, HVAC / Electrical Technician / Contractor 35-years Experience.

< Previous | Next >

Show MoreShow Less