HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

My furnace is blowing cool air. Reset dozens of times.

Customer Question
My furnace is blowing...

My furnace is blowing cool air. Reset dozens of times. Occasionally will work (mostly during day) but not so much at night

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

Filter is new. Thermostat has been reset and new batteries

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

Nope. Have a service call in, but r they can’t come out til next wednesday

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

Nope. I can’t figure it out

Submitted: 6 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 3 minutes by:
1/4/2018
HVAC Technician: Phil, Mechanical Engineer replied 6 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello,

If you are handy and have a multi meter

Take close up, exceedingly well focused photo's of the wiring diagram glued inside the furnace/air handler door, and the printed circuit board mounted on the blower, , that shows where the thermostat wires connect, and I will mark them up with trouble shooting instructions.

Use the 'add files' link next to your send button to get the photo(s) to me.

.

We can go from there with training, coaching and diagnosis.... without a time limit, In depth with as much detail as needed .

.

When we finally get the situation solved, please select the 'finish and rate your expert link' near the top of your page and click on it.

.
My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
It’s a trane xv90 furnace. Can’t get a good pic as its dark. Gas dryer is working fine. Any other thoughts.
HVAC Technician: Phil, Mechanical Engineer replied 6 months ago

Attach the picture in the morning, we can go from there. It could be many things, not related to the gas supply, from a dirty flame sensor rod to a bad printed circuit board etc.

See you in the AM

Ask Your Own HVAC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
7,426 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

7,426 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

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,019 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

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 have a blank Honeywell smart thermostat and no heat and I
I have a blank Honeywell smart thermostat and no heat and I took it off the wall. It has no batteries. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
1 year old house in Dallas Texas. Temp outside is 15 which
1 year old house in Dallas Texas. Temp outside is 15 which is abnormally cold. Ecobee thermostats upstairs and down. Both set at 74 and can't seem to get them above 66 this morning. Dropped from 68 la… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
We just replaced the batteries in our thermostat and the low
We just replaced the batteries in our thermostat and the low battery icon still flashes. What can we do about that? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have an alert from my new furnace. If I can. It is a rheem
I have an alert from my new furnace JA: Did you check the furnace's filters? Customer: yes JA: Do you plan on doing the work yourself? Customer: if I can JA: Anything else we should know to help you b… read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
We have a Comfortmaker furnace Model G9MXE0801716A installed
We have a Comfortmaker furnace Model G9MXE0801716A installed new in May 2015. The furnace keeps shutting off intermittently (mostly during the night when the temperature drops) with Error codes 4 and … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Just installed a RTH2410/2510 on furnace in double wide
Just installed a RTH2410/2510 on coleman furnace in double wide coach. it does not control anything. I have 4 wire R,B,G,W … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Rheem 400 series thermostat at cottage. Came up today, and
Rheem 400 series thermostat at cottage. Came up today, and the thermostat is just flashing a whole bunch of numbers. Power is on....pulled unit off of wall, one of the batteries had corroded. Replaced… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
White Rodgers thermostat not heating even after changing battery.
I have a 1F81-51 White Rodgers thermostat. It's been flashing low battery for a while. This morning, the house felt very cold and the heat was not functioning. Set on 69, but house was 61. I replaced … read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
I have a thermostat that's flashing the present temperature
I have a White Rogers thermostat that's flashing the present temperature and my AC is no longer cooling. Any idea what this signal means. Thermostat came with house so I have no manual … read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
My Honeywell thermostat chronotherm iv plus display stopped working last night. We have re
My Honeywell thermostat chronotherm iv plus display stopped working last night. We have replaced the batteries, cycled the disconnect, etc. Does the condenser or fan coil or what control the unit? The… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I moved the y wire on my thermostat and put it under the r
i moved the y wire on my thermostat and put it under the r terminal with the red wire to bypass the thermostat. My AC has come on and is blowing cold air. In original wiring, it comes on and blows hot… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
The batteries in my Noma 2 thermostat went dead last night and the furnace stopped. After
The batteries in my Noma 2 thermostat went dead last night and the furnace stopped. After changing the batteries in it the fan will work if set to ON, but will not blow hot air (even if Heat is set to… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a honeywell thermostat CT3200A0307PF1B, cant find manual
I have a honeywell thermostat CT3200A0307PF1B, can't find manual not online. I replaced the batteries without turning system off. Put on my glasses and saw I should have done that. So i did it again w… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
We have a programmable thermostat. Its set now on cool for
We have a programmable thermostat. It's set now on cool for summer and has been working fine until recently. It's set for 78 (cool) during the day and to go to 76 at night. When the temp in the house … read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have a Coleman Evcon furnace with an installed air conditioner
I have a Coleman Evcon furnace with an installed air conditioner that isn't working correctly. The thermostat calls for the compressor and blower to come on but the air isn't blowing out cold. The lin… read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
we have a trane furnace with a taystat 340,350 thermostat.
we have a trane furnace with a taystat 340,350 thermostat. lost power this morning for a few hours and now thermostat just shows eights and has all days and times lit up and we can't figure out how to… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
my thermostat says battery so I changed the batteries but
my thermostat says "battery" so I changed the batteries but it still says "battery" and the heater won't come on… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
My home is not heating. The temp does not raise over 62 degrees
My home is not heating. The temp does not raise over 62 degrees and is set at 72 degrees. I already tried changing the batteries, what else can I try?… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 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