HVAC

Have HVAC questions? Ask an HVAC Expert for answers

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

Related HVAC Questions
On my goodman 080 furnace there is no c wire for my nest
on my goodman 080 furnace there is no c wire for my nest thermostat power. Can I use the neutral wire on the furnace?… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
8,553 satisfied customers
Just Answer! what, exactly is the C wire in a HVAC system?
Hi Just Answer! what, exactly is the C wire in a HVAC system? Is it just ground? I'm in Australia and I have a Braemar TG320N gas furnace. It has a Honeywell 32207415-054 thermostat (that is battery p… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
8,553 satisfied customers
I have a Honeywell T874R Thermostat with One Setpoint Lever.
I have a Honeywell T874R Thermostat with One Setpoint Lever. I am wondering if it has the correct wiring to upgrade it to a more modern WiFi one. I was looking specifically at the Honeywell RTH6500WF.… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,377 satisfied customers
I have a Honeywell TB8575 thermostat with pipe sensor that I
Hi, I have a Honeywell TB8575 thermostat with pipe sensor that I am trying to use to control a 2 pipe 24 vac fan coil system in my condo. I only control the fan kicking on and off. The building switch… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
, I have a 2nd hand 1st generation NEST thermostat that I am trying to install. I'm
Hi, I have a 2nd hand 1st generation NEST thermostat that I am trying to install. I'm from Australia so we don't have the C wire but I have a 12volt AC or 24volt DC transformer to supply power. How do… read more
Christopher Comeau
Christopher Comeau
14 satisfied customers
I have a Honeywell American Standard thermostat that is in
I have a Honeywell American Standard thermostat that is in excess of 7 years old. It just stopped working properly - does not sense room temperature to turn on the heat. I am looking at the Honeywell … read more
Appliance Guru
Appliance Guru
19,175 satisfied customers
I have a galaxy cast iron gas boiler want to attach c wire
I have a galaxy cast iron gas boiler and i'm trying to determine where to attach the 'c' wire on the furnace for my new wifi thermostat. The cable is an 18/5 but is only using 2 of 5 wires currently. … read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
I am trying to install a WF Honeywell thermostat in the cabin.
I am trying to install a WF Honeywell thermostat in the cabin. The heater is a gas wall unit and the thermostat only has 2 wires. I have purchased a model RTH8580WF1007 to replace a manual White Roger… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,023 satisfied customers
I have a Honeywell Mastertrol Minizone MM-2 control board for
I have a Honeywell Mastertrol Minizone MM-2 control board for my heat/cool unit in the attic. I bought a new thermostat that requires a common wire (because of the multi-zones; something I probably sh… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
Im installing a Honeywell TH8320ZW and replacing old thermostat.
I'm installing a Honeywell TH8320ZW and replacing old thermostat. This is heat only (oil if that matters) and there are only 2 wires (red and white). Instructions indicate that a 24VAC common at the c… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
8,553 satisfied customers
I want to install the Wifi Thermostat RTH8580WF. I have no
I want to install the Wifi Thermostat RTH8580WF. I have no C wire options - wiring is R and W only and running new cable is not an otion. However, an external transformer is a possibility. Some other … read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,087 satisfied customers
I am a home automation integrator installing a Crestro thermpstat
I am a home automation integrator installing a Crestro thermpstat on a Trane VX80 HVAC unit. I need to tap the 24vac common down to the thermostat. I have a open conductor but the I do not know where … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
772 satisfied customers
I have installed four Honeywell thermostats in my house and
I have installed four Honeywell thermostats in my house and they work great. They were easy to install. Now I'm trying to install a thermostat in my vacation home and I'm stuck. The unit calls for 24V… read more
ComfortZone
ComfortZone
Associate Degree
515 satisfied customers
I am installing a bypass humididfier and need to connect it
I am installing a bypass humididfier and need to connect it to the furnace control board to draw 24vac power and control for the humidifier water flow solenoid. The instructions with the humidifier ju… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
I am wiring up a new digital thermostat. Ive got everything
I am wiring up a new digital thermostat. Ive got everything wired correctly except for the c or common wire so I can power the thermostat with the furnaces 24vac transformer. The furnaces terminal blo… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,023 satisfied customers
Hi. I have a 2006 carrier infinity system with 4 zones. All
Hi. I have a 2006 carrier infinity system with 4 zones. All carrier equipment. The keypads were blank yesterday. I replaced the 3a fuse. everything was fine. This evening, when I got home from work, t… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,023 satisfied customers
How can I test my Robertshaw 7000BER Natural Gas furnace valve
How can I test my Robertshaw 7000BER Natural Gas furnace valve to see if it is functional or not. Gas won't turn on.I have measured 24VAC from Transformer. Put in a new Thermostat. But no worky.… read more
DanielC
DanielC
Service manager
High School or GED
95 satisfied customers
I am replacing a weathertron with a hunter 44860. The weathertron
I am replacing a weathertron with a hunter 44860. The weathertron wires are: o-orange, r-red, t-brown, g-green, y-yellow, x2-black b-blue, w-white. The hunter options are: rc/r-24vac power supply, c-2… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,216 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