HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC
This answer was rated:

I have a 96% efficient furnace. It was properly installed

I have a Bryant 96%...
I have a Bryant 96% efficient furnace. It was properly installed and we've used it for the past 5 years. I turned up the thermostat to start it up this morning for the first time this year. Within a few minutes the house filled with smoke. I oooked at the furnace and there;s no fire going on. I know this furnace well, having studied all the manuals when we first had it installed. The air system for the house consists f a 14" soft duct down from the big floor vent, which has a new dust filter installed. The air is pulled over the heat exchanger by the secondary blower and out to the distribution plenum. That system is entirely isolated from the combustion side, which is three burners aimed into the heat exchanger and a forced air furnace fan that feeds the burners with a lot of oxygen. The air leaves the heat exchanger as slightly warm and wet exhaust air, which goies outside via a pvc 2" pipe.
So how can anything burn in the house/plenum side?
Many thanks.
Show More
Show Less
Ask Your Own HVAC Question
Answered in 6 minutes by:
9/23/2017
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,580
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

All I can do is speculate based on your description. It's possible something (mice?) got into the house side of the heat exchanger over the Summer. When you fired up the furnace their nesting material started smoking from the heat. If it's steam not smoke (smoky odor?) it's possible water from AC condensate collected inside the heat exchanger (house side) and the heat from the heat exchanger caused it to flash to steam.

Ask Your Own HVAC Question
Customer reply replied 2 months ago
Thank you - I have to go out for a few hours but will come back late this afternoon. The thing on my mind is that the house side of the heat exchanger doesn't get hot enough to start anything smoking - even if something was right up against the heat exchanger because there's the huge blower fan pulling air over it that would cool it. However, I'll get down there and a couple of the big ducts off plenum box off and look inside later today.

You're welcome. The general ambient temp isn't too hot but the heat exchanger tube surface itself is very hot.

Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,580
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified
Rick and 87 other HVAC Specialists are ready to help you
Ask your own question now
Ask Rick Your Own Question
Rick
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,580
22,580 Satisfied Customers
Experience: 40+ yrs. experience as a licensed oil & gas technician.

Rick 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

6,877 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
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 have a Fedder forced air furnace model 080n3nd and the
I have a Fedder forced air furnace model 080n3nd and the pilot keeps going out. It stays ignited for about 24 hours then goes out.… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,877 satisfied customers
58MVP080 model got the heat exchanger issue. I have tech
Hi Pearl,58MVP080 model got the heat exchanger issue … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a Ducane high efficiency furnace and the draft
Hi I have a Ducane high efficiency furnace and the draft inducer fan will not go on. It just hums. I also have no LED light blinking at all. … read more
Rick
Rick
HVAC Supervisor
22,580 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
Rick
HVAC Supervisor
22,580 satisfied customers
Need a heat exchanger for model GIN 80bu-1000 14B-3A; ser. #
need a heat exchanger for model GIN 80bu-1000 14B-3A; ser. # 1607K 03798 … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Have a weather maker infinity ultra high efficiency furnace
have a weather maker infinity ultra high efficiency furnace 1/2 hp electric motor kgmp 2001all fan seperated from shaft disk fan 9 inchs in diameter … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Is it unsafe to have a cracked heat exchange on your
Is it unsafe to have a cracked heat exchange on your furnace? … read more
Rick
Rick
HVAC Supervisor
22,580 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
Rick
HVAC Supervisor
22,580 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
Rick
HVAC Supervisor
22,580 satisfied customers
I have a lennox high efficiency furnace, it's not blowing
I have a lennox high efficiency furnace, it's not blowing hot air … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,877 satisfied customers
My high efficiency furnace is showing 3 flashes on the code
My coleman high efficiency furnace is showing 3 flashes on the code - says pressure switch stuck open - which switch is that? … read more
Rick
Rick
HVAC Supervisor
22,580 satisfied customers
I need a heat exchanger kit for a weil-mclain ultra 105, no
i need a heat exchanger kit for a weil-mclain ultra 105 … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,877 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
How do I check heat exchanger for blockage. Today. Sounds
how do I check heat exchanger for blockage JA: I'll do all I can to help. How long have you been dealing with this? Customer: today JA: Do you plan on doing the work yourself? Customer: yes JA: Anythi… read more
Rick
Rick
HVAC Supervisor
22,580 satisfied customers
When were stainless steel heat exchangers required for
When were stainless steel heat exchangers required for residential usage and/or what HVAC company was the first to provide them. And are they as effective as touted.… read more
D.E. Anderson
D.E. Anderson
Industrial Refrigeration Service Manager
200 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
Rick
HVAC Supervisor
22,580 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