HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Have an a/c unit model Rheem RGRM-07EYBGS, when the blower…

Customer Question
Have an a/c unit model...
Have an a/c unit model Rheem RGRM-07EYBGS, when the blower starts it makes a noise as if is trying to start making a woosh noise then it kiks in. I asked the a/c person that install it He said it was normal because it is a 95 %. It does not sound normal
to me. Also, I would like to change the outside unit model 14AJM30A01 to a two stage unit. My reasoning, I want to have the a/c runing in 1st stage a lower blower speed. The noise right now is drivig me crazy. But the unit calls for a minimum of 1000 CFM.
Any suggestions. By the way is an upright hallway unit next to my bedroom.
Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 5 minutes by:
6/24/2015
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,024
Experience: Furnace, A/C and heat pump specialist.
Verified
The noise you are experiencing with these units is normal.Often the motor will even have a "rocking' sound on start up or shut down. The motor is what is known as an ECM motor. It does not have speeds as such, but rather the rpms is determined by DIP switch settings on the control board that control the motor though low voltage or DC voltage depending on the motor.
The control board will automatically determine cfms motor needs to move based on these DIP switch settings.
Ask Your Own HVAC Question
Customer reply replied 2 years ago
So, what is the solution?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
Unfortunately you can not replace the ECM in these furnaces with a normal PSC motor. I know this is not the answer you hoped for, but I can only provide accurate information.
I am not trying to be a wise guy or be rude, but the options are to try to get used to the different noise this unit makes or replace it with a lower efficient furnace that uses a PSC motor.
Ask Your Own HVAC Question
Customer reply replied 2 years ago
That is the problem, is eather off or full speed, how can I convert the a/c part to a two stage to get the blower to work at 50 to 60% of what he is working now.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
Have you tried adjusting or has installer tried adjusting the dIP switches?
Ask Your Own HVAC Question
Customer reply replied 2 years ago
well I did move the 5 & 6 dip, but what I was advised last someone in your organization was not to lower it to much because the unit requires a certain amount of cfm otherwise it may ice/freeze
Customer reply replied 2 years ago
are you still there?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
THis is true. I believe on this furnace you can change 7 and 8 to adjust a small amount like 10% up or down. You might experimenet with those.
Ask Your Own HVAC Question
Customer reply replied 2 years ago
About changing the outside unit to a two stage with a communicating board
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
That might help with the operating noise at the times when temp is not very warm outside and only first stage is required, but on days where temp is say 85 or higher and second stage is needed, we still have to maintain the 1000cfms.
However, you will still experience some of the rocking and swooshing on start up as that is just characteristic of the motor
Ask Your Own HVAC Question
Was this answer helpful?
Ask airheatman Your Own Question
airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,024
9,024 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

airheatman 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
If an original furnace in the home is vented thru the roof,
If an original furnace in the home is vented thru the roof, can the existing venting system be used for a replacement furnace in Ontario Canada?… read more
Wvfan79
Wvfan79
Mecanical Designer & Estimator
High School or GED
775 satisfied customers
I have a 90% furnace with a VR8205S2890 Honeywell gas valve
I have a 90% furnace with a VR8205S2890 Honeywell gas valve which has too much of a heat rise. Even a slightly dirty filter will trip the high limit and put the unit in lock out. The temp at the regis… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
How do you properly install a vent/flue and combustion air
How do you properly install a vent/flue and combustion air piping on a direct vent warm air furnace ?… read more
jrodhvachelp
jrodhvachelp
19 satisfied customers
We had a Trane efficiency furnace/and a/c installed in
We had a Trane Hi efficiency furnace/and a/c installed in Illinois on 8/29/2017. It had lots of condensation. Model S9V2B0U3PSAA. Please help. … read more
Bill
Bill
Service Mgr
100 satisfied customers
My High efficiency furnace is making a loud humming sound. I
My Bryant High efficiency furnace is making a loud humming sound. I turned the furnace off about 20 minutes ago but the sound has not abated. It may be the blower as it sounds like a fan OR the thermo… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,796 satisfied customers
I have an amana distincion high efficiency furnace. The
I have an amana distincion high efficiency furnace. The blower is running but no flame. The diagnostic light is flashing 4 times red which the chart says is open limit switch.. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have an amana high efficiency furnace, I have a floor
I have an amana high efficiency furnace, I have a floor drain that is clogged and have been cleaning up the CLEAN water, now sewage until I can get it snaked. My furnace condensation drains into this … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a luxaire high efficiency furnace. The blower is
I have a luxaire high efficiency furnace. The blower is working but no heat. The thermistat (a new one) also said it lost connection. There is an indicater light on the furnace circuit board that is b… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
If light on a Rheem 90 high efficiency furnace is blinking
If green light on a Rheem 90 high efficiency furnace is blinking twice, how do you know if the high pressure or low pressure switch is faulty? … read more
airheatman
airheatman
HVAC Technician
9,024 satisfied customers
I have a question about Carrier High Efficiency furnace,
I have a question about Carrier High Efficiency furnace, this thing is driving me crazy. The problem with it is it will stop working in the night. This is a Furnace/AC and Dehumidifer all in one model… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
My high efficiency furnace has stopped working normally. I
My high efficiency furnace has stopped working normally. I have discovered that the main burner will only ignite and burn when the pvc vent from the outside is lifted from its seat so that the combust… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a Lennox G60UHV-60C-110-02 mid efficiency furnace
hello, I have a Lennox G60UHV-60C-110-02 mid efficiency furnace that is vented up a 5 inch metal sleeve in a 20 foot high brick and motor chimney. THE PROBLEM IS THAT THE MOISTURE CONDENSES AND WATER … read more
Rick the plumber
Rick the plumber
Owner
9,857 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 the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a 96% efficient furnace. It was properly installed
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 f… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
does lennex have an off brand called aries
does lennex have an off brand called aries?… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I just installed a brand new Armstrong 93% efficient furnace.
I just installed a brand new Armstrong 93% efficient furnace. It will not fire up. Code flashes 3 tiomes. Owners manual says: Three Flashes, Low-fire pressure, rollout, drain pressure, or Aux. limit o… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
Does the Bryant 310AAV/JAV Gas Furnace qualify as an energy
Does the Bryant 310AAV/JAV Gas Furnace qualify as an energy efficient unit?… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
hi, I got a lennox gf3-110 from 1962. The input BTU is 110,000
hi, I got a lennox gf3-110 from 1962. The input BTU is 110,000 and the ouput listed is 88,000 BTU. If you use the efficency formula INPUT BTU x EFFICENCY = OUTPUT BTU, You will find that this would be… read more
Rick the plumber
Rick the plumber
Owner
9,857 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