HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Related HVAC Questions
I am replacing an old -rodgers thermostat with 3 wires with
I am replacing an old white-rodgers thermostat with 3 wires with a Honeywell digital thermostat. When I removed the old plate the only labeling on the old was "Y or 6" with y white wire, grey wire con… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I am having a problem with wiring a new Honeywell 9580
I am having a problem with wiring a new Honeywell 9580 thermostat from an old white Rodgers thermostat … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have an old Marley D22 thermostat controlling 2 6 foot
i have an old Marley D22 thermostat controlling 2 6 foot electrical baseboard heaters. The old thermostat has 2 red wires and 2 black wires. I have 3 sets of black/white wires with ground coming from … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a Honeywell T7516C1001 programmable thermostat - the
I have a Honeywell T7516C1001 programmable thermostat - the wire terminal designations are W, X2, X3, and X4. I have 4 wires - red, green, yellow, and white. Which colors go to which terminals? Thank … read more
Bart Jay
Bart Jay
Vocational, Technical or Trade Scho
596 satisfied customers
I wish to change heating zone valves Both Honeywell -but the
I wish to change heating zone valves Both Honeywell -but the wire colours are different original --orange-blue -white -grey-black and brown New -orange -blue-white-grey-green and fawn (light biege) wh… read more
Plumbers_Mate
Plumbers_Mate
General Manager
Vocational, Technical or Trade Scho
3 satisfied customers
I need to know to what wires mean what i didnt mark them when
I need to know to what wires mean what i didnt mark them when i took off the old thermostat and i trying to install a new digital hunter thermostat… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
I have a 98 RUUD 3-ton package unit model number UQMA-A030JK
I have a 98 RUUD 3-ton package unit model number UQMA-A030JK and a honeywell RTH221 and am having a he$$ of a time figuring out how to wire it can you help?? I am in Tucson, [email protected] degrees… read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
I am replacing my old honeywell thermostat with a new honeywell
I am replacing my old honeywell thermostat with a new honeywell touchscreen themostat. the old one had four wires connected to it red \white\green\black how do i connect the wires to the new one?i ass… read more
Tom
Tom
HVAC Technician
Vocational, Technical or Trade Scho
770 satisfied customers
I am replacing a Weathertron thermostat (Trane heat pump) with
I am replacing a Weathertron thermostat (Trane heat pump) with a Honeywell RTH7600. I do not know where to connect the white and grey wires. The black wire is connected to "C". Other than that, all ot… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
I have a Lennox G20 Whisper Heat unit. I am replacing the Johnson
I have a Lennox G20 Whisper Heat unit. I am replacing the Johnson Ignition control unit with a Honeywell. All of the rewiring makes sense except the white wires. The old Johnson unit has two white wir… read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
Replacing replace Honeywell LR95329-1 with a Honeywell TH6220D
Replacing replace Honeywell LR95329-1 with a Honeywell TH6220D and am wondering about the wiring. Have a 2H/1C Heat Pump System. Noted on the old a "W3" wire and want to know if that connects to the "… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
trying to install a honeywell RTH6350 thermostat. My old thermo
trying to install a honeywell RTH6350 thermostat. My old thermo (honeywell) only has 2 wires to it. Both grey oil fired furnace if that makes a difference. Will this thermo work for this replacement? … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
forgot to label wires before changing thermostate..old one(mercury
forgot to label wires before changing thermostate..old one(mercury old one) had: Green White Blue Brown Yellow Red new honeywell digital --has these for heat pump (rental house-i think? there is a hea… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
hi just replaced my old SWITCHMASTER MIDI motorised valve for
hi just replaced my old SWITCHMASTER MIDI motorised valve for a honeywell v4073a valve but the wiring has 6 wires to old valve and some colour diffrences. can tou advise what coulours need to be match… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
871 satisfied customers
I am trying to install a new thermostat an Honeywell RCT8101
I am trying to install a new thermostat an Honeywell RCT8101 Series. Unit is a Rheem Heat pump. Before the change I have G = Green R = RED B = Blue O = none Y = Yello W2 = White X = Grey L = None E = … read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
We are trying to install a RTH2510 thermostat - there are only
We are trying to install a RTH2510 thermostat - there are only two wires leading into the old round honeywell thermostat - what do we do?… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
Hello, i am trying to upgrade from a Baystat 239 to a Honeywell
Hello, i am trying to upgrade from a Baystat 239 to a Honeywell RTH110B and there are 10 wires coming from my wall and only 5 places to put new wires. The Baystat was connected as follows: 0(orange) X… read more
Tom
Tom
HVAC Technician
Vocational, Technical or Trade Scho
770 satisfied customers
Help!!!! We are roasting!!!! We bought a Honeywell RTH7400
Help!!!! We are roasting!!!! We bought a Honeywell RTH7400 thermostat, today, and it isn't working!!… read more
Kenton Guidry
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
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:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

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:

Phil

Phil

Mechanical Engineer

7,634 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,024 satisfied customers

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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x