HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Code4 on a mobile home furnace. fan turns backwards. yes…

Customer Question
Code4 on a mobile...

Code4 on a mobile home furnace. fan turns backwards.

Contractor's Assistant: Did you check the furnace's filters?

Yes brand new

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

Yes

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

Replaced the limit control switch

Submitted: 2 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 1 hour by:
3/30/2018
HVAC Technician: Phil, Mechanical Engineer replied 2 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, I need the brand and model number of the furnace, its on a sticker in the same compartment as the gas valve in most cases.

.

we can go from there

.

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 2 months ago
coleman dgaa070bdtb
HVAC Technician: Phil, Mechanical Engineer replied 2 months ago

thanks, I am parking the wiring diagram here

I am parking the manual here

for future reference

,

Those motors are not reversible, so that if it is actually running in reverse, its a bad motor, OR its not actually running in reverse, tell me in detail how you know its running in reverse?

,

IF air is sucking into your registers and blowing out of your return duct then it the furnace is installed backwards, OR its an updraft furnace when you need a down draft.... that would not be a problem with the fan running in reverse but the wrong furnace or furnace installed backwards

,

Use the add files link to send me some photos in that case, its next to your send button

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: 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 Rheem gas furnace air handler will run for 1-2 mi. then
My Rheem gas furnace air handler will run for 1-2 mi. then stop. … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
I have an old RUUD UHQA-1310s. It doesn't blow cold air. Can
I have an old RUUD UHQA-1310s. It doesn't blow cold air. Can I recharge it with freon? … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
Can I get the circuit board for a Kelvinator 2.7kw reverse
Can I get the circuit board for a Kelvinator 2.7kw reverse cycle window unit? … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
My AC unit is not turning on. It has been super hot ant it
My AC unit is not turning on. It has been super hot ant it failed lsat nite … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
I have an American Standard Condensing Unit 4TTB3018-060. I
I have an American Standard Condensing Unit 4TTB3018-060. I have never messed with this unit before but I cannot afford someone to clean it this year. So I went out removed all the screws pulled off o… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,862 satisfied customers
MY WHIRLPOOL WATER HEATER MODEL# IS L40S62-403 PURCHED 7/13
MY WHIRLPOOL WATER HEATER MODEL# ***** ***** PURCHED 7/13 WILL NOT LICHT. I HAVE DONE WHAT THE BOOK SAYS DO AND GET NO SPARK FROM THE IGNITER. I TRIED LIGHTING THE PILOT ( HOLDING THE PILOT BUTTON) WI… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a bathroom faucet #0749746. The hot water will not
I have a bathroom faucet #0749746. The hot water will not turn off. I have taken it apart and can't see any problem, nothing broken. I have to keep the water turned off under the sink. Please help! … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
An elderly neighbor asked me to replace her Thermalstat
An elderly neighbor asked me to replace her Thermalstat because it was so complicated she could not use it. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Billy. You were a great help a couple of months ago with my
Hi Billy.You were a great help a couple of months ago with my thermostat install. I am a newfie owner too!Installing another thermo that needs a common wire. It's a gas heat/ac combo commercial unit. … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a blank screen. Less than 12 hours. Haha. Anything
Haha. Anything more than being told to push a button or 2 would be way out of my class. … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
I have an A.O. PN? F48T03A50 Bar code 17491 blower motor
I have an A.O. Smith PN? F48T03A50 Bar code 17491 blower motor that's bad in a York HVAC unit. The label states a 10MFD cap 3/4 HP, RPM: 1110/4spd, 115VAC, 60HZ @ 8.6A, 1 PH, FR 48Y. … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a Frigidaire FAS256R2A Air Conditioner, The
I have a Frigidaire FAS256R2A Air Conditioner, The electronic control panel stopped working, stuck in fan only mode. When I turn on it only blows warm air and the touch controls don't respond and the … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,862 satisfied customers
How do you get the ac off the schedule mode? Couple of days.
I continue to turn the air down like right now it is at 55 degrees and it has not moved off of 71 degrees for the last three hours … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
What does the message 1+2 mean, when the air conditioner
What does the message 1+2 mean , when the air conditioner won't run, … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
The blower fan runs 24 hrs without stop how can I fix it. I
the blower fan runs 24 hrs without stop how can I fix it. I changed main board. … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
The switch by my air unit was on tripped this
the switch by my air unit was on tripped this morning--should it be on reset? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
HVAC: making and installing an outdoor air conditioner
HVAC: making and installing an outdoor air conditioner condenser WATER MISTING SYSTEM to keep my outdoor ac unit running cooler an more efficient.I do NOT have hard water and also put a calcium filter… read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
My son changed out my thermostat WITHOUT turning the power
My son changed out my thermostat WITHOUT turning the power off at the breaker now nothing furnace/air conditioning won't run. I even changed back to the old thermostat (I turned the power off) just in… 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