HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Related HVAC Questions
Gas Furnace No Heat. System is a York Diamond 80, A/C & Nat
Gas Furnace No Heat. System is a York Diamond 80, A/C & Nat Gas furnace Model: P2MPC20N09601G with a White-Rodgers 50A50-230 Control Board. A/C has been working fine. Just switched the Tstat to Heat S… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
Can you tell me what color, red,,, blue, goes to what
Can you tell me what color, red, green, white, blue, goes to what terminal? I have electric experience but very little HVAC experience. I jumped w2 to E and I am stuck … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
I have an old Lenox Mercury tube thermostat HV Q634A 1047 2.
I have an old Lenox Mercury tube thermostat HV Q634A 1047 2. I need to know if this is 24 volt and if it is ok to splice thinner wires to the thick ones so they will connect into the Nest thermostat. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
The blower fan on my downstairs central HVAC system will not
The blower fan on my downstairs central HVAC system will not come on when set to cool/AC. However, when the system is set to heat, it DOES come on. In other words, it works fine when in heating mode. … read more
Appliance Guru
Appliance Guru
18,830 satisfied customers
I just replaced the thermostat Rudd central air conditioner
I just replaced the thermostat for a Rudd central air conditioner (NOT a heat pump). I hooked up the 4 wires, but there is a 5th wire from the air handler, which is Blue. If I don't use it, the thermo… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
My hanging aerovent 77k btu furnace will burn till baffles
My hanging aerovent 77k btu furnace will burn till baffles are hot then shut down fire and spin fan till baffles cool down. The fan stops and the process starts to cycle. Is there a timer screw (like … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I have a bcl120s. Tank is fueled up. Burner fires. Limit switch
I have a bcl120s. Tank is fueled up. Burner fires. Limit switch seems to work as it shuts off burner after about 60 sec of burn time. Line voltage is on red and black wires that are bundled with purpl… read more
Rick
Rick
Supervisor
25,217 satisfied customers
I just replaced my motor and capacitor, but when I start the
I just replaced my motor and capacitor, but when I start the unit I just get a hum from the motor. Any ideas? The capacitor looks a little different, it still has just two posts, but on each post it h… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
I have a new RTH111/RTH221 Programmable thermostat, and I have
I have a new RTH111/RTH221 Programmable thermostat, and I have Red, Green, Blue and Black wires coming out of the wall. What color goes to the YGRW connectors. I have central gas furnace and AC. Thank… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,367 satisfied customers
Im looking for a schematic for a Lennox HP8-651V-59 that I
I'm looking for a schematic for a Lennox HP8-651V-59 that I took out of customers home. I am replacing it with a Goodman GSH13. Need the schematic to know what the colored wires yellow, blue, red, bla… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a boiler with the s8610m module. it wont ignite but
I have a boiler with the s8610m module. it won't ignite but if you switch the TH-W and the 24V wires it will start fine but will not shut off, it will keep heating up too hot. there is 24v going to th… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
My upstairs lennox unit is not cooling. My neighbor is a reasonably
My upstairs lennox unit is not cooling. My neighbor is a reasonably inexperienced technician having earned a degree from the local tech school. He has worked some for HVAC contractors. He did some tro… read more
Heath Moyer
Heath Moyer
1,056 satisfied customers
I have a goodman GMT090 furnance. I need to attach a Tjernlund
I have a goodman GMT090 furnance. I need to attach a Tjernlund power vent to the system. The controller for the power vents tells me to connect terminal 2 to the "C" terminal on the furnance. I cannot… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
Need thermostat wiring instructions for Goodman AC with heat strip.
Need thermostat wiring instructions for Goodman A/C with heat strip model GPC1348H21BB to Hunter Fan model 44150B thermostat… read more
DanielC
DanielC
Service manager
High School or GED
95 satisfied customers
Im replacing an old A.O. Smith fan motor, with a new A. O.
I'm replacing an old A.O. Smith fan motor, with a new A. O. Smith fan motor Model DL1036. I'm having trouble figuring out the wiring. The capacitor is easy, but the other wires I can't figure out. My … read more
Kenton Guidry
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
we are replacing the old style thermostat with a one week programmable
we are replacing the old style thermostat with a one week programmable and the wires are not labeled just colors. can you help me with this… read more
Kenton Guidry
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
i have an old carrrier gas furnace model number is XXXXX
i have an old carrrier gas furnace model number is XXXXX The motor runs non-stop and no heat . the thermostat cant turn it off. I am having to unplug the furnace. i tried replacing the circuit board. … read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,216 satisfied customers
hi, installed model rth221b thermostat that has y, w, g, r,
hi, installed model rth221b thermostat that has y, w, g, r, rc terminals I have four wires red, green, white and blue. does blue wire go on the yellow terminal the furnace seems to short cycle since I… read more
BOILERMAN856
BOILERMAN856
Owner/ HVAC Technician
Vocational, Technical or Trade Sch
8 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