HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

My furnace won't turn on, seems as if there isn't any

Customer Question
My furnace won't turn...

My furnace won't turn on

Contractor's Assistant: Did you check the furnace's filters?

Seems as if there isn't any electricity

Contractor's Assistant: Do you plan on doing the work yourself?

Yes

Contractor's Assistant: Anything else we should know to help you best?

It was working yesterday I turned off the power turned it back on not working now

Submitted: 8 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 4 minutes by:
11/11/2017
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,378
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

What's the brand and model number of your unit?

Ask Your Own HVAC Question
Customer reply replied 8 months ago
on it 1 sec
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Ok

Ask Your Own HVAC Question
Customer reply replied 8 months ago
Goodman
Customer reply replied 8 months ago
GMT070-3B
Customer reply replied 8 months ago
Did you get that?
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Yes give me a few to pull the specs

Ask Your Own HVAC Question
Customer reply replied 8 months ago
Cool thanks
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Ok look into the viewing port on the blower compartment access panel and tell me if you see an LED. Is it flashing? how many times before pausing?

Ask Your Own HVAC Question
Customer reply replied 8 months ago
Can you elaborate on the "viewing port on the blower compartment access panel"
Customer reply replied 8 months ago
On the control board I see one LED bulb. It is NOT FLASHING.
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

If it's lit but not flashing that's normal operation. Try turning the thermostat down then back up again and see if the furnace responds. If it doesn't turn the power off, then connect the leads on the R & W thermostat terminals together and turn the power back on. What happens

Ask Your Own HVAC Question
Customer reply replied 8 months ago
No no. The unit is OFF.The thermostat is set to ON. The circuit breaker is set to ON. The switch by the furnace is ON.The LED light on the control board is OFF. (It may look on because of the flash of my camera).The thermostat is no displaying ANY thing besides 70. No buttons I push changes that. I can't "set" it to anything else.
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Ok, so if no LED then there's no power to the unit. Where did you turn thenpower off to it?

Ask Your Own HVAC Question
Customer reply replied 8 months ago
That's what I'm asking you.
Customer reply replied 8 months ago
I switched a switch from on to off.I've checked the switch (the circuit) from the service panel. It is ON. The service panel breaker that says furnace is ON.The thermostat is set to On.The problem i'm having is that it should be on. But it's not.
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

You could have a bad switch. If you have a meter see if the switch has voltage on both terminals (other probe to common) or you can try just replacing the switch

Ask Your Own HVAC Question
Customer reply replied 8 months ago
How do i determine if the meter has voltage on both terminals?
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

You put 1 probe on a neutral (white) lead (often to ground will work) then the other on one terminal at a time on the switch. If the switch is on you should have power to both switch terminals

Ask Your Own HVAC Question
Customer reply replied 8 months ago
I don't understand. Do i need to have a voltage reader? I don't have that.
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Yes you need a volt meter or a multi meter OR you can try just replacing the switch

Ask Your Own HVAC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
7,426 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

Phil is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

7,426 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

1,019 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 >

Related HVAC Questions
I have a Trane head and my wired digital thermostat is a
Hi, I have a Trane head and my wired digital thermostat is a XR401 comfort control. We had the AC on briefly yesterday afternoon, then turned off opened windows for the night., the weather changed, lo… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have no power to my thermostat box. We had to turn off the
We had to turn off the gas momentarily yesterday for a possible flex hose leak outside of the house so we turned off the furnace and turned it back on and it appeared to come on but no there's no heat and there's no light to the thermostat box in the hall … read more
Bill
Bill
Service Mgr
110 satisfied customers
I changed the condensation pump on my gas furnace and now
I changed the condensation pump on my gas furnace and now the furnace won't start. The old pump was direct wired through the kill switch and the new one had a plug. The new one also had a yellow wire … read more
Rick
Rick
HVAC Supervisor
24,378 satisfied customers
We changed turned the furnace off yesterday, because of
We changed turned the furnace off yesterday, because of doing some gas work. We turned the furnace back on yesterday and it was working. and today it doesn't work. … read more
Tim Ohms
Tim Ohms
HVAC Journeyman
31 satisfied customers
I have a trane comfort link 2 thermostat and there is a red
Hi there I have a trane comfort link 2 thermostat and there is a red light on it and the display current says "Error 126" we we had a power outage yesterday and it might be related to that. The power … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Our Heil DC90 ultra gh efficiency furnace has the blower
Hi our Heil DC90 ultra high efficiency furnace has the blower running but is generating no heat. Can you help?… read more
Rick
Rick
HVAC Supervisor
24,378 satisfied customers
I installed a new thermostat last night, and the furnace
I installed a new thermostat last night, and the furnace (Dunkirk 90) won't turn back on. The first time I tried this morning (after realizing it never went back on last night) it went through the ind… read more
Rick
Rick
HVAC Supervisor
24,378 satisfied customers
I thought that would fix it and the furnace did seem to start
I thought that would fix it and the furnace did seem to start running, but then it stopped again and now even the igniter isn't coming on. Tried the breaker, turning the power to the furnace off and o… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,010 satisfied customers
I have an Armstrong Ultra SX 80 forced air gas furnace. The
I have an Armstrong Ultra SX 80 forced air gas furnace. The unit tries to turn on, but it seems that it acts as if there's no call for heat as it revs up and then stops after 5 seconds. Technician fro… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
I have a ComfortMaker Furnace (dont have the model number
I have a ComfortMaker Furnace (don't have the model number with me). It stopped working completely yesterday. I have the old fashion dial thermostat that has selections for heat, ac, off. And another … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Hi, I have a Coleman Evcon with a 91.0 efficency rating. It
Hi, I have a Coleman Evcon with a 91.0 efficency rating. It is probably 9 to 10 yrs old. I called a tech out because I noticed that water began appearing on the floor below. The first tech came out an… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a GMP075-3 Furnace, it stopped working last night and
I have a GMP075-3 Furnace, it stopped working last night and when I turn it off and back on all it does it make an electrical humming noise. Nothing is kicking in. Not sure where to start checking to … read more
Heath
Heath
Vocational, Technical or Trade Scho
1,002 satisfied customers
Hello. I have a Pulse furnace from 1984 (sorry forgot to bring
Hello. I have a Pulse furnace from 1984 (sorry forgot to bring the model number to work so I don't have it right now) that is having problems starting. I had a licensed technician replace the diaphrag… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
we recently had a kelvinator 2 stage installed and now it isnt
we recently had a kelvinator 2 stage installed and now it isn't working. it seems like it wants to start up, but it shuts of after 30 seconds. I tried restarting it, but it didn't last. the instructio… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
My Bryant furnace wont turn on. It has the automatic ignition
My Bryant furnace won't turn on. It has the automatic ignition pilot so I probably need to call a technician, correct? Nothing I can do myself?… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
Hi! Im currently house sitting a place that has a furnace
Hi! I'm currently house sitting a place that has a furnace with a Beckett AMG burner. Yesterday it went out, needed a new fuel filter. I changed it, bled the air out of the line, reset it, and it fire… read more
tinman
tinman
n/a
Vocational, Technical or Trade Scho
171 satisfied customers
I have a Carrier 58ZAV070 gas furnace. Yesterday I turned
I have a Carrier 58ZAV070 gas furnace. Yesterday I turned up the temp and it came on like normal. Three minutes later the furnace shut off and has not worked since, the fan isn't even working. I check… read more
Robert
Robert
Associate Degree
161 satisfied customers
My daughter installed a programmable thermostat in the summer
My daughter installed a programmable thermostat in the summer (Las Vegas). Worked OK with the AC, but now the heat won't come in -- it only blows air. Model no. is Honeywell RTH2310B. Can you help us … read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 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.

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