HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

The light is flashing 3 times inside the furnace (my heat is…

Customer Question
The light is flashing...

The light is flashing 3 times inside the furnace (my heat is not working)

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Yes, and yes

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

Heat is coming out cold out of the vents

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

Not really. I took the face off of the furnace and the light is flashing 3 times. I turned the furnace off to reset it The light is still flashing 3 times. Also, it was making a funky noise last week. Like, really noisy when the heat turned on.

Submitted: 1 month ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 3 hours by:
3/10/2018
HVAC Technician: gotoman for ac, HVAC Technician replied 1 month ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,314
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified

Russ here. If you could tell me make and model number of furnace please. Russ

Ask Your Own HVAC Question
Customer reply replied 1 month ago
Model # N9MP105OB12B1
Serial # AO41991859
HVAC Technician: gotoman for ac, HVAC Technician replied 1 month ago

3 flashes is pressure switch open. This can be caused by a bad induce draft motor. The small motor in middle of furnace. This may be the noise you are hearing. Turn power off to furnace and retry and see if the small fan comes on. Feel it and see if it is warm. Let me know. Russ

Ask Your Own HVAC Question
Customer reply replied 1 month ago
That’s exactly what the back of the furnace cover said. I no longer hear the noise. The fan is functional and working.
HVAC Technician: gotoman for ac, HVAC Technician replied 1 month ago

This could be several problems. Faulty switch,blocked vent or clocked tubing. Check the vent for ice first. If it is clear check the hoses on the pressure switches. These are small switches that have hoses connected to inducer draft fan assembly. Remove hoses and clean small connecters with paper clip. Let me know. Russ

Ask Your Own HVAC Question
HVAC Technician: gotoman for ac, HVAC Technician replied 1 month ago

Do you still need help. Russ

Ask Your Own HVAC Question
Was this answer helpful?
Ask gotoman for ac Your Own Question
gotoman for ac
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,314
5,314 Satisfied Customers
Experience: 51 years of experience install design and repair of all makes and models of AC

gotoman for ac 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

6,938 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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

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

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 Honeywell T3 thermostat and a heat pump. The heat
I have a Honeywell T3 thermostat and a heat pump. The heat comes on no matter what the setting is. I need help. … read more
hvacdave84
hvacdave84
53 satisfied customers
My furnace is running continually. I have it shut off and it
my furnace is running continually. I have it shut off and it is still running. It is 82 degrees in here. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
What's code 13 on a Richmond tankless water heater? Just
What's code 13 on a Richmond tankless water heater? … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a luxaire furnace. Installed a new pressure switch
I have a luxaire furnace. Installed a new pressure switch but it still flashes pressure switch open. Blower comes on and line is clear. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,690 satisfied customers
I've lost the code to unlock my Honeywell T4 thermostat?
I've lost the code to unlock my Honeywell T4 thermostat? … read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
953 satisfied customers
I am trying to put the top of my Honeywell thermostat back
I am trying to put the top of my Honeywell thermostat back on … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,690 satisfied customers
Munchkin boiler not firing. Goes through blower cycle and
Munchkin boiler not firing. Goes through blower cycle and stope with water temp on doisplay. No error codes reported. Unplugged all sensors one at a time and made sure proper error code reported. Al f… read more
Bill
Bill
Service Mgr
80 satisfied customers
I'm trying to troubleshoot an error code on a Evolution Plus
I'm trying to troubleshoot an error code on a Bryant Evolution Plus 90i. … read more
gotoman for ac
gotoman for ac
HVAC Technician
5,314 satisfied customers
I have a property where I am having my HVAC completely
I have a property where I am having my HVAC completely replaced. The existing line sets are in the ceiling and it will not be easy to run the new line sets. The contractor is saying that I really have… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I looking new gas steam boiler, How much Input BTU or Steam
Hi,I looking new gas steam boiler, How much Input BTU or Steam Sq. Ft. Should I need?2nd fl. Slenderized Radiators 9” W X 22” L X 19” H --- 5 tubes and 9 sections4” W X 21” L X 18” H --- 4 tubes and 1… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Our inducer motor p/n 25J1201 needs replacement and my
Our inducer motor p/n 25J1201 needs replacement and my husband ordered one (he is in the industrial heating business). It appears to be just a matter of a few screws and the wire hookup for replacemen… read more
gotoman for ac
gotoman for ac
HVAC Technician
5,314 satisfied customers
York model ZJ036C00A2AAA1C, First time, Yes, How often
How often should this unit be serviced to check refrigerant and replace filter? … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,690 satisfied customers
Venstar T1100REC to Taco boiler controller. All I need is
Venstar T1100REC to Taco boiler controller. All I need is the T1100REC to close the loop between R & W on the Taco... how do I configure that?… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
We have just moved into a house and I cannot figure out how
We have just moved into a house and I cannot figure out how to program the thermostat. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,690 satisfied customers
Burnham sea 15 code. All day. Maby. No sea 15 code wating
burnham sea 15 code JA: I'll do all I can to help. How long have you been dealing with this? Customer: all day JA: Do you plan on doing the work yourself? Customer: maby JA: Anything else we should kn… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Elec furnace- I replaced blower mtr, sequencer, limit
coleman elec furnace- I replaced blower mtr, sequencer, limit switch, transformer, coil elements I tested and found them good working. So I by past thermostat, but still does same thing. Turns on, run… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,690 satisfied customers
Heat would not turn off even though the thermostat was off.
Heat would not turn off even though the thermostat was off. I had my heat set at 67 and I woke up sweating because it was 85 degrees in the upsatairs and it kept getting hotter. It's a 2 zone unit, up… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
AN OLD HONEYWELL MERCURY THERMOSTAT WITH A 1F80-0471 RODGERS
I AM REPLACING AN OLD HONEYWELL MERCURY THERMOSTAT WITH A 1F80-0471 WHITE RODGERS PROGRAMABLE THERMOSTAT. 4 WIRES COMING OUT OF WALL, W,G,Y, R. NEW THERMOSTAT HAS RC JUMPED WITH RH. CANT ADD RED TO TH… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 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