HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a condensing furnace, MN G51MP- 48C- 090 -06 this…

Customer Question
Hi , i have...

Hi , i have a condensing furnace, MN G51MP- 48C- 090 -06 this furnace gives trouble every year at some point. flash code says condensation is backed up or not enough combustion air or pressure switch is stuck open . I've cleaned out heat exchanger also changed pressure switch have not piped combustion air to outside but it seem's to be enough in the crawl space. any answer's

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Yes filter is clean , thermostat is calling

Contractor's Assistant: Do you plan on doing the work yourself?

Yes I'm a service tech.

Contractor's Assistant: Anything else we should know to help you best?

No its baffling

Submitted: 7 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 3 minutes by:
11/18/2017
HVAC Technician: Rick, HVAC Supervisor replied 7 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,193
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. First I’ll need some more info so I have a more complete picture of your situation.

What are the dimensions of the space the furnace is in?

Ask Your Own HVAC Question
Customer reply replied 7 months ago
Approx. 1500 square ft. Crawl space well ventilated
HVAC Technician: Rick, HVAC Supervisor replied 7 months ago

what's the LED flash sequence?

Ask Your Own HVAC Question
Customer reply replied 7 months ago
Red light was off green slow heart beat
HVAC Technician: Rick, HVAC Supervisor replied 7 months ago

Did you clean out the condensate trap and drains?

Ask Your Own HVAC Question
Customer reply replied 7 months ago
all drains & heat exchanger
HVAC Technician: Rick, HVAC Supervisor replied 7 months ago

That's all I got. I'm going to open this up to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.

Ask Your Own HVAC Question
Was this answer helpful?
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
I CANT FIND THE RESET RED BUTTON ON MY AMANA AIR COMMAND
I CAN'T FIND THE RESET RED BUTTON ON MY AMANA AIR COMMAND 80 SSE II… read more
tadowhere
tadowhere
Maintenance Supervisor
Vocational, Technical or Trade Scho
90 satisfied customers
i have a amana air command 80 sse, blows cold air, cleaned
i have a amana air command 80 sse, blows cold air, cleaned flame sensor, nothing? thanks Jim… read more
Bart Jay
Bart Jay
Vocational, Technical or Trade Scho
596 satisfied customers
Where's my furnace reset button? Furnace fan not working.
Where's the reset button on my furnace?… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
How to clean heat exchanger coils, filters have been clean
filters have been clean recently and I am getting an airflow alarm on the thermostat … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,862 satisfied customers
The high temp wire that is wrapped around the heat exchanger
the high temp wire that is wrapped around the heat exchanger is showing no continuity, I get A2 error code … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My heat exchangers do not function any where near the rated
My heat exchangers do not function any where near the rated BTU output. They were installed three years ago by a professional electrician. The units operate, but you can only tell by putting your hand… read more
F. Naz
F. Naz
CA Finalist & Completed B.com
278 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
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
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
24,193 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
6,938 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
24,193 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
my rheem classic 90 gas heater keeps shutting down after about
my rheem classic 90 gas heater keeps shutting down after about 5. min any sugestions… read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
I have a Bryant Plus 90i furnace (355mav). Got a LED code 33.
I have a Bryant Plus 90i furnace (355mav). Got a LED code 33. (Limit Switch Fault) -Indicates the limit, rollout switch or ausiliary limit switch is open or the unit is operating in high hear only mod… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
I have a RPJ Heat Exchanger Comfortmaker hone furnace. The
I have a RPJ Heat Exchanger Comfortmaker hone furnace. The furnace will not go on. Checking the furnace moude I see a red light blinking once, that is saying system lock out. What does that mean, and … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
Furnace pressure switch open with inducer on. Help!
Furnace diagnostics indicate "pressure switch open with inducer on." What could be the problem? I recently had my natural gas turned on after being off for a few months. Furnace (Nordyne model KG6RC-0… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
1985 Rheem Imperial 80 plus gas furnace mod # RGDC 07EC1GS
1985 Rheem Imperial 80 plus gas furnace mod # XXXXX 07EC1GS starts and runs correctly for 20-30 minutes and then the main burner shuts down. The inducer motor,pilot flame and main blower continue to o… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
The furnace knob to turn to "on" and "pilot" wont depress
The furnace knob to turn to "on" and "pilot" won't depress.… 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