HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

Furnace won't light blinking 2 flashes

Customer Question
Furnace won't light blinking 2 flashes
Submitted: 2 years ago.Category: HVAC
Ask Your Own HVAC Question
Answered in 7 minutes by:
12/4/2015
HVAC Technician: Tim H., HVAC Professional replied 2 years ago
Tim H.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3,971
Experience: Experienced in all aspects of HVAC, both residential and commercial.
Verified

Hi, I'm Tim and I'm an HVAC expert here to assist you with your questions. Please provide all information I request as it makes it more difficult to troubleshoot something when I'm not there onsite. Essentially, you become my eyes and ears. Thanks for the opportunity to help. At the end of our dialog, you will have a chance to rate my service, but please wait until we are finished and you're satisfied you have all the information you need. Sorry to hear about your issues with your furnace. In order to help, need you to do a couple things for me. I need the full model number (should be on a tag inside the unit). Also, there may be a flash code "legend" posted down near the board somewhere. If you can find, let me know what it says for a 2 flash code.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Mpga100b4b....2 flashes ..flame failure lockout
Customer reply replied 2 years ago
I'm guessing bad ignitor!
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Could be bad ignitor or dirty flame sensor.

Ask Your Own HVAC Question
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Are the burners lighting at all?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
No they aren't. ..gas valve opens to let the gas in ...but ignitor is not glowing at all!
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Do you have the Honeywell Smart valve on this unit or just a standard ignitor?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
I can hear the,gas in the burner tubes ....when the
Customer reply replied 2 years ago
How can I tell
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Does your gas valve look similar to this?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Looks to me just like a standard ignitor...ceramic..about 4 inches long
Customer reply replied 2 years ago
No it does not!
Customer reply replied 2 years ago
It's Honeywell but not that style!
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

OK, that would not be the Honeywell Smart valve. If you hear hissing, but no orange glow from ignitor, then more than likely it is a burned out ignitor.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
That's what I thought ..I can see what looks,to be a little,hairline Crack in it!
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Yup, that was my next suggestion, look for a small crack!

Ask Your Own HVAC Question
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

There are many online sites that sell Ducane parts such as this one. You will need to replace the ignitor. Let me know if you have additional questions on this. Otherwise, good luck! Thanks for using Just Answer and please don't forget to rate my service as that's how experts get paid (thanks in advance for any bonus left). Otherwise experts work at their own time and expense. Feel free to post back with any additional questions.

Ask Your Own HVAC Question
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

Let me know if you need additional help on this. Otherwise, good luck! Thank you for using Just Answer and please don't forget to rate my service as that's how experts get paid (Thanks in advance for any bonus left). Otherwise experts work at their own time and expense. Feel free to post back with any additional questions.

Ask Your Own HVAC Question
Ask Tim H. Your Own Question
Tim H.
Tim H.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3,971
3,971 Satisfied Customers
Experience: Experienced in all aspects of HVAC, both residential and commercial.

Tim H. 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
My boiler is running low on water every day or so. I see a
My boiler is running low on water every day or so. I see a good deal of steam escaping around the water-level indicator (a vertical glass tube), and I wonder if I have the valves adjusted wrong. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a Lennox lf24-150 that is giving me a 4 flash. It
Hi I have a Lennox lf24-150 that is giving me a 4 flash. It runs perfectly for 2-3 cycles then starts fires but the fan doesn't turn on. Then I get the 4 flash since it is overheating without the fan … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Sure. I need to reset my Trane Xe90 Furnace. It's on
Sure. I need to reset my Trane Xe90 Furnace. It's on external lockout after failing to light. Happened after I tried switching to a new thermostat. … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Have a Ac/Heater unit Model RGPS-10EBRJR made 03/2010, the
Have a Ac/Heater unit Model RGPS-10EBRJR made 03/2010, the heater will come on & light, as soon as the blower comes on the flame will go out. it will do this over & over, I can turn the heater off & l… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
It doesn't seem like my newly installed Aprilaire humidifier
It doesn't seem like my newly installed Aprilaire humidifier is working. Shouldn't I hear water draining out the condensation drain? … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
My spa heater isn't working properly and I don't know how to
Hi my spa heater isn't working properly and I don't know how to interpret the codes … read more
David Bowden
David Bowden
Owner
466 satisfied customers
We use Flanders brand Pre Pleated 40 LPD filters for our
We use Flanders brand Pre Pleated 40 LPD filters for our AC/CH unit. It is 16x25x2 in size. We cannot find the MERV rating of this particular filter. Can you tell us? My wife's allergist urges a filte… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have trane XV 90 furnace and it is flashing a pressure
I have trane XV 90 furnace and it is flashing a pressure switch fault … read more
niro9800
niro9800
0 satisfied customers
I have an Armstrong Air gas furnace which is about 7 years
I have an Armstrong Air gas furnace which is about 7 years old. Recently it hasn't been working right. The LED on the control board has been flashing 3 times showing the pressure switch is open with t… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I just finished installing a new ruud heater in my home and
I just finished installing a new ruud heater in my home and I'm getting a code 59 that means its sensing water and the heater won't run. Art … read more
Certified HVAC Service Technician
Certified HVAC Service Technician
Welder
Vocational, Technical or Trade School
2 satisfied customers
Having issues wiring a new Honeywell rth9585 with old
Having issues wiring a new Honeywell rth9585 with old wiring. Old thermostat is trance xt302a which used ZY1, R, G, W1, W2 and B wires. … read more
Michael Ferryman
Michael Ferryman
86 satisfied customers
Thermostat called for heat, igniter was no for about 5
Thermostat called for heat, igniter was no for about 5 seconds, then the blower kicked in and at the same time, it turned off the igniter. … read more
HvacmanSean
HvacmanSean
Owner
HVAC
228 satisfied customers
I have a Rodgers 50A55-288-05. Furnace has been working but
I have a white Rodgers 50A55-288-05. Furnace has been working but no on the control board I am getting 3 flashing lights and ignition switch does not heat up. Exhaust fan tuns on but burners and ignit… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
We have a comfort star plus a/c unit and received an error
we have a comfort star plus a/c unit and received an error code of H1 on the … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Our furnace fan seems to be running continuously in spite of
our furnace fan seems to be running continuously in spite of the fact that the inside temperature is as shown on the thermostat setting … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a outdoor boiler. I use the honeywell TRIAC line volt
I have a outdoor wood boiler. I use the honeywell TRIAC line volt thermostat. The one I had worked well on manual mode. If went bad today and I replaced with a new one, same as the old. The fan will t… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a 30 year old Plus 90 furnace. Recently I noticed a
I have a 30 year old Bryant Plus 90 furnace. Recently I noticed a humming noise when the blower starts up, and is gone when at full speed. In other forums (and this one), the capacitor has been identi… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Will running my fan constant help heat a tri level home with
will running my fan constant help heat a tri level home with a arcoaire N8MXL furnace installed in 2015. … read more
Michael Ferryman
Michael Ferryman
86 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