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 MagiicAir Your Own Question

MagiicAir
MagiicAir, HVAC Technician
Category: HVAC
Satisfied Customers: 110
Experience:  20+ years Commercial and Residential Systems
27337131
Type Your HVAC Question Here...
MagiicAir is online now
A new question is answered every 9 seconds

Ive been working on a Carrier 58MVB060-F-12114 Furnace for

Resolved Question:

I've been working on a Carrier 58MVB060-F-12114 Furnace for the last couple days. The furnace would fire just in, nice straight blue flame with no hickups. After about 10-15mins the furnace would cut out and the board would show (LED) a "code 34 - Ignition Proof Fault." This problem will repeat and even fail on a code 14 eventually.

Gas pressure is acceptable to nameplate and componets all appear fine. Ground was fine, and even relocated. The unit is only 1 maybe 2 years old. Flame sensor was checked and even cleaned. I spoke with 3 Carrier service reps on the phone. First person told me to replace the board. The board was replaced and it failed again. Another told me to replace the electrode, so I replaced the flame sensor and still unit failed.

I had to pack up and do some research and ask some of my seniors. The next day I returned and tried a couple other things. I monitored the unit for 2 hours and it didn't fail once. Several hours later I got called back from the customer and the furnace was doing the same thing again.

The furnace is undersized for the buildng for 1, but shouldn't be a big deal, just take longer to heat the space. I live in BC, and lately it's been getting below 0'C and it almost appears that the unit fails when the ambient temp goes below freezing, otherwise I have no idea what the problem could be as it is intermitten. I suspect that it may not be the actual unit, but the venting that could be causing the problem.

Like I said, it runs fine for a number of minutes even hours and then will cut out all of a sudden and show an ignition fault. Can you give me any suggestions?
Submitted: 3 years ago.
Category: HVAC
Expert:  MagiicAir replied 3 years ago.

MagiicAir :

ill see if i cant assist you here.

MagiicAir :

two possibilities here

MagiicAir :

one and most common, is the roof cap for the exhaust vent is gone and wind is causing ill effect on the pilot sensor.

MagiicAir :

the second is the polarity of the wiring from the breaker panel is wrong. Sometimes you can switch the power leads comming in to that furnace and solve the problem

MagiicAir :

most techs dont bother to check polarity and this becomes evident as the unit gets older

Customer:

hi there! The exhaust actually is actually exhausting out horizontally, but come to think of it, it didn't have any cap or anything to prevent wind

Customer:

wind could be pushing the flu back into

MagiicAir :

ok, there is your problem exactly

MagiicAir :

you need to buy a proper side discharge cap for it

Customer:

I don't want to use that as an excuse though, but I'll see if I can put something over it and see if it solves the problem

MagiicAir :

if that vent is open, it requires a cap by code here in the states

MagiicAir :

and yes that will definately cause your issue

Customer:

it has a guard over it

Customer:

but no cap

MagiicAir :

you mean like a mesh?

Customer:

I don't do any residential really, but I imagine the rules are the same here in Canada, I'll have to read up on that

Customer:

yeah mesh

MagiicAir :

is this pvc pipe?

Customer:

yes

MagiicAir :

i would suggest you add a 90 downturned elbow

MagiicAir :

and then cover that with the mesh

Customer:

yeah the problem seems intermittend

Customer:

almost like whenever it went below freezing it would drop out

Customer:

but I would just find it very odd that the unit would run for a good period of time, and then fail on ignition

MagiicAir :

not uncommon at all

Customer:

well that's great to hear

Customer:

I figured it was something to do with the venting

Customer:

the unit appears ok

Customer:

and I don't think it's the supply voltage

MagiicAir :

stick a 90 on that pipe and i bet your problem goes away

Customer:

I'll give it a shot.

MagiicAir :

and its not a matter of voltage really, its the polarity of that voltage

Customer:

Thanks so much for your time

Customer:

even single phase?

MagiicAir :

one side is hot which should connect to the black wire, and the other side is neutral and should be on the white wire

MagiicAir :

single phase is the only place you have this issue really

Customer:

yeah that's how it's wired

MagiicAir :

in 3 phase it just affects direction of flow

Customer:

yeah

Customer:

ok well I'm pretty sure it's the venting

Customer:

but if not, I'll try the polarity

MagiicAir :

im inclined to believe the same thing. vent

MagiicAir :

may even have a critter that is dead inside the pipe

MagiicAir :

thats another issue i see on those systems

MagiicAir :

rats

Customer:

and they would get into the pvc even with a mesh cover?

MagiicAir :

but with the mesh thats kinda unlikely

Customer:

I don't deal with residential, only commercial and industrial

Customer:

awesome

Customer:

I appreciate your input

MagiicAir :

i normally do ems systems and Lieberts

MagiicAir :

amd good luck

Customer:

Thanks!

MagiicAir, HVAC Technician
Category: HVAC
Satisfied Customers: 110
Experience: 20+ years Commercial and Residential Systems
MagiicAir and 2 other HVAC Specialists are ready to help you

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