How JustAnswer Works:

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

Ask Tim H. Your Own Question

Tim H.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3112
Experience:  Experienced in all aspects of HVAC, both residential and commercial.
27228809
Type Your HVAC Question Here...
Tim H. is online now
A new question is answered every 9 seconds

got a 13 year old janitrol gas furnace that is now not igniting

Resolved Question:

got a 13 year old janitrol gas furnace that is now not igniting . Ive got 3 blinking lights. I was given some bad advice after the unit would only fully ignite on its own 80% of the time. I was told to disconnect hose and clean out nipple . I thought it was odd to do since the only problem was surface ignitor wouldnt always work. Now ive got no gas only the beginning start up of the fan located above the gas regulator. Now I dont have the gas being discharged to even fire up manually. Where do i go from here? Please give me some feed back.

Thanks Dylan
Submitted: 9 months ago.
Category: HVAC
Expert:  Tim H. replied 9 months ago.
Hi, I'm Tim and I'm an HVAC expert here to assist you with your questions. Thanks for the opportunity to help!
Without the specific model, I can't be positive, but from doing some research, the 3 flash code points to a pressure switch failing to close. This could be a bad pressure switch, inducer motor, blocked vent, etc.
Expert:  Tim H. replied 9 months ago.
Have you checked any of these things yet?
Customer: replied 9 months ago.

Where is model number located normally on this furnace.

Expert:  Tim H. replied 9 months ago.
Should be inside the top door somewhere on a tag. The flash code legend that tells what the number of flashes means may be down inside the blower compartment somewhere
Customer: replied 9 months ago.

Sorry no model number that can be located i have looked in the past and I do apologize . Why am I now not getting any gas to ignite?

Expert:  Tim H. replied 9 months ago.
Because your pressure switch is not closing.
Customer: replied 9 months ago.

Where exactly is the pressure switch and how can i get it functioning again it was working until I pullled hose to inspect

Expert:  Tim H. replied 9 months ago.
It is a round looking device. maybe black or silver in color and has an orange or grey hose going to it.
Customer: replied 9 months ago.

Okay i have located it now what would be my next step

Expert:  Tim H. replied 9 months ago.
(see above.) This could be a bad pressure switch, inducer motor, blocked vent, etc. It could be a kinked pressure switch hose or the barb that the hose attach's to on the furnace is plugged.
Customer: replied 9 months ago.

Okay just detached it all from back wall of furnace cleaned it all out checked for blockage and found none and no kinks in hose.

Expert:  Tim H. replied 9 months ago.
There should be two wires going to top of pressure switch. If you wait until inducer motor gets up to full speed and put these together, furnace should run. Since you found nothing wrong with hose, could be bad switch, slow inducer motor, blocked vent, etc.
Customer: replied 9 months ago.

I was able to jump the two and got it to fire up.

Expert:  Tim H. replied 9 months ago.
OK, so now we just have to figure out what's causing it. If vent to outside is clear, then it could be an inducer motor that's slowing down or even a bad pressure switch. Pressure switches are not easy to diagnose (requires a manometer and the knowledge of how to us it) so, you may want to try replacing it and see if that solves the problem. They are not terribly expensive.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3112
Experience: Experienced in all aspects of HVAC, both residential and commercial.
Tim H. and 5 other HVAC Specialists are ready to help you
Customer: replied 9 months ago.

Can I go online for that I do have an account at R E Michaels but I dont think the would carry that specific switch but i have had luck on ebay for boards and other related controls. Now just to let you know the entire reason why I was even messing with this furnace was because the new surface ignitor I installed wouldnt always ignite. What control is bad or going bad to not tell that glow plug to turn on every time heat is trying to kick on. Ive been watching it . For the most part it fires up on its on but every now and then it wont and will go into lockout mode with 1 blink from the board.That was really the answer im chasing until I ran into this other problem with this switch.

Expert:  Tim H. replied 9 months ago.
Remember, if the pressure switch isn't made---NOTHING further will happen on the furnace.

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. Jimmy Bagley, IA
< Last | Next >
  • 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. Jimmy Bagley, 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
< Last | Next >
  • http://ww2.justanswer.com/uploads/SE/ServiceTechRus/2012-6-7_2119_056.64x64.JPG gotoman for ac's Avatar

    gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    3888
    Retired HVAC/ Electrical & Boiler contractor. Industrial
  • http://ww2.justanswer.com/uploads/skibum0101/2008-12-16_015819_just_answer.jpg Rick Mather's Avatar

    Rick Mather

    HVAC Technician

    Satisfied Customers:

    3132
    35 years experience, HVAC
  • http://ww2.justanswer.com/uploads/RY/Rygis20/2011-5-7_3143_DSC5324.64x64.JPG Matthew's Avatar

    Matthew

    HVAC Technician

    Satisfied Customers:

    1994
    14 years experience in the HVAC field of service, installation, Manual J & D calculations
  • http://ww2.justanswer.com/uploads/KE/kentguidry/2011-9-26_214316_0059.64x64.jpg Kenton Guidry's Avatar

    Kenton Guidry

    HVAC Technician

    Satisfied Customers:

    962
    12 years install/service experience.
  • http://ww2.justanswer.com/uploads/solarman1947/2009-12-13_223915_phpkKBcXq_c2PM.jpg Rick Ridley's Avatar

    Rick Ridley

    UK Heating Engineer

    Satisfied Customers:

    871
    Retired But have had 30 years on the tools, Ex CORGI
  • http://ww2.justanswer.com/uploads/Ironheadfan/2009-12-18_222416_pump_005.jpg Tom's Avatar

    Tom

    HVAC Technician

    Satisfied Customers:

    770
    16+yrs HVAC/R service. Residential Commerical Industrial