HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I have a Trane natural gas forced air furnace model number

Customer Question
BLD45L936A furnace that was built...
I have a Trane natural gas forced air furnace model number BLD45L936A furnace that was built in 1983. It has a problem with consistently igniting the burners. If I reset the furnace by turning off the power and turning the control valve to the off position
for 5 minutes and then turning everything back on, the furnace will ignite and everything will work as normal. The problem is that it will not consistently work. I have to reset the furnace to get it to work. Is there a way I can isolate the bad part or parts?
Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 6 hours by:
11/15/2015
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,288
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified

This unit should have a sensor for flame. Sensor located next to last burner. Looks like a large piece of wire with one wire attached. Clean with sandpaper and retry furnace. Russ

Ask Your Own HVAC Question
Customer reply replied 2 years ago
My furnace has electronic ignition
Does your suggestion work for that?
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

Yes . It should light and prove flame thru sensor. Russ

Ask Your Own HVAC Question
Customer reply replied 2 years ago
I cleaned the sensor with sandpaper as you suggested and the furnace will not ignite. No sparking from the electronic ignition. What is the next step to isolate the cause of the problem?Thanks,
Gino
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

Can not find any info on that furnace. Searched Trane archives and it comes up obsolete. I will opt for another expert.

Ask Your Own HVAC Question
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello

1PICTURE

Please attach a well focused, close up photo of the wiring diagram glued inside the service panel,you can use the paper clip-icon at the right end of the toolbar at the top of this dialog box,Include a picture of the thermostat wire connections to the printed circuit board in the same area.

If there is no paper clip-icon, look for the '+attach files' link at left of your send button.

I can mark it up with trouble shooting instructions. You will need a multi meter ($30 at a hardware store) and some experience working with appliances, let me know a lot about your skill sets in those regards.

If none of this in your skill sets, tell me which direction you are from the center of the nearest city and I will look for a few well rated service outfits in your area.

We can go from there.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Hello Phil, I do have a multimeter and have repaired electric and gas appliances in the past. I have attached some pictures. Let me know if you need anymore. You can call my cell at(###) ###-####if that works better for you.Thanks,
Gino
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago

Thanks.

See if you can find a 'sequence of operations' note on the diagram or elsewhere on the furnace and send me a photo of it.

I also need the brand and model number of the gas valve.

Thanks,

Ask Your Own HVAC Question
Customer reply replied 2 years ago
I looked all over the furnace and could not find a sequence to operation note. I could find a model number on the gas valve but the lighting instructions sheet pasted on the outside of the furnace says that it is a 36E Series gas valve. According to the Operating Parts Replacement List that came with the furnace documentation, the catalog number for the gas valve is WG19X215. I am also sending pictures of the gas valve.
DSC01818.JPGDSC01818.JPGDSC01819.JPGDSC01819.JPGDSC01820.JPGDSC01820.JPGDSC01821.JPGDSC01821.JPGDSC01821.JPGDSC01821.JPG
Customer reply replied 2 years ago
Phil, I also found the attached in my owner's information manual.
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago

Hello again, that furnace has some pressure switches that I am not familiar with, and lacking a sequence of operation on that furnace I am not confident that I can help you... I will opt out, so other of our experts here can see your question.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
Phil, Thanks for trying. Hopefully, someone can help.
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
6,938 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

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 vintage forced air furnace of about 1966 manufacture
My vintage forced air furnace of about 1966 manufacture recently cracked a fire box and the tech strongly recommended that I buy a new replacement furnace to heat my 1400 square foot home. I don't kno… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have an air temp forced air furnace. It starts by igniting
I have an air temp forced air furnace. It starts by igniting the gas but shuts off after a few seconds it says it is running normal but after a few try's it locks out … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
We have an electric Weatherking forced air furnace in our
We have an electric Weatherking forced air furnace in our garage that isn't heating properly. It seems like only the coils one side are heating. The model #WBHA14J11SUAA serial#TMI90123573. This furna… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Installed a forced air furnace this summer in the attic of
Installed a forced air furnace this summer in the attic of my small second home in Michigan. Since it gets extremely hot up there in the summer (90+degrees) The air conditioning struggles to keep the … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
I have a gas forced air furnace, new, with a 8320U
I have a gas forced air furnace, new, with a 8320U thermostat. The furnace cycles on and off every 6 mins. 6 on and then 6 off. Temp is set to 72 and it's 30 degrees outside. Is that too often? … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a Goodman forced air furnace. The blower motor was
I have a Goodman forced air furnace. The blower motor was replaced last January. It recently stopped working / over heating. It humms but I can't push start it. I tested the 10 mfd capacitor on a mete… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Ge gas fired forced air furnace pilot valve wont turn. Done
ge gas fired forced air furnace pilot valve wont turn … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I'm having trouble with my forced air furnace. It's not
I'm having trouble with my forced air furnace. It's not heating my apartment as well as it should. It started just a day ago. Everything seems to be running fine. I installed a new air filter so I kno… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a newer model Armstrong oil forced air furnace. I
I have a newer model Armstrong oil forced air furnace. I want to get a procedure for getting it ready for the winter heating season. Maintenance, conditioning oil supply, etc..… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I need to convert my forced air furnace from natural gas to
I need to convert my coleman forced air furnace from natural gas to propane. Where can i order the nevessary oarts to convert? Model no. DGAT090800, Serial No. XXXXXXXXX Its shows for propane - drill … read more
Heath
Heath
Vocational, Technical or Trade Scho
1,002 satisfied customers
My gas fired force air furnace won't blow hot air, is the
yes by following the instruction in front of the furnace … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a rheem forced air furnace Model 3600-100ADC the
I have a rheem forced air furnace Model 3600-100ADC the circuit board is broke as it cracked when moved. What circuit board would you reccomend to get to replace… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
We have a Ruud, gas, forced air furnace. The date on the
we have a Ruud, gas, forced air furnace. The date on the wiring diagram is 11/15/82. There is a number next to it I can not really read. I believe it is "DWG" 90-21283-02. It is used at a lake home so… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a Payne forced air furnace model PG9YAB. I am
I have a Payne forced air furnace model PG9YAB. I am installing a new thermostat, which needs to have a wire connected to the C. On the furnace there is already a wire connected to C. In the thermosta… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
My rheem forced air furnace will light and run for about 10
My rheem forced air furnace will light and run for about 10 minutes then shut down then you can reset and will work another 10 minutes. Any ideas… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Gas water heater and gas forced air furnace sharing flue.
Gas water heater and gas forced air furnace sharing flue. Which flue connector should be above the other? Also, what, if anything, do you wrong with this picture? It is the water heater flue connector… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have forced air furnace model G8C10016MUC11A. The problem
I have forced air furnace model G8C10016MUC11A. The problem is the ignitor not burn on and the diode lamp on the control board flashing slowly … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Is this normal for an electric forced air furnace? If not
Is this normal for an electric forced air furnace? If not what could possibly be the cause? The contactor is brand new.. https://youtu.be/EqBfpipJ5XI… read more
Phil
Phil
Mechanical Engineer
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