HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

My ac unit is running and the fan is als running. My

Customer Question
Hi, my ac unit...

Hi, my ac unit is running and the fan is als running. My thermostat is set on cool and auto

Contractor's Assistant: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?

I don't know. I live in Florida and when the power came back on just the fan was running. Then the ac came back hours later. I trie turning the fan circuit breaker off and the ac won't come on. It only is on when the fan is running too?

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

No, my ac vender doesn't work on weekens

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

Is it harmful that the fan runs with the ac?

Submitted: 10 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 4 minutes by:
9/24/2017
HVAC Technician: Phil, Mechanical Engineer replied 10 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,794
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, it is never harmful if the fan runs with the AC on or if the AC is off. If you are not getting cooling it is because the compressor in the outside unit is not running in most cases.

We can go from there without a time limit, In depth with as much detail as needed , after you rate this answer:

Select the 'finish and rate your expert link' near the top of your page and click on it.

.

OPENING STATEMENTS

Important note about RATING my work:

I am a retired mechanical engineer and HVAC/electrical/ refrigeration and boiler contractor ... with 56 years in this business. The last 20 of those years consulting for major firms nationally.. and with over 8,000 questions answered here since 2009, with a 98.5% satisfaction rating.

.

All I ask is please respect me and my input by selecting the***RATING LINK***at the top of your page, that is the only way I am credited through the site. Rating does not affect your charges nor ability to refund if not satisfied.

.

If you need to be coached through a full diagnosis/repair,and wiring etc. for up to two days, and wish to be trained to use test instruments...... that goes well beyond' Just a simple Answer' of course, and goes beyond what most other experts here offer.....rate my answer so far positively.. . and I will deliver that training and coaching to you All on the same dime so to speak.

.

Lacking a positive rating I can spend days helping a person at my own expense and loose my shirt, shorts and socks on the deal.

.

Attach a close up photo of the wiring diagram glued to the inside of the blower access door and I will mark it up with trouble shooting instructions then follow up with step by step training and coaching until you have a solution.

.

Photo must be exceedingly well focused. Use the 'add files' link next to your send button to get the photo to me.

.

Phone call offers:

If you wish to accept the companies $25 phone call offer, if indeed they send you one, this will go a *lot faster, but it IS 100% optional... or we can continue here in this dialog box at no additional charge.

.

Tell me a little about your technical background and instruments on hand so that I can coach you most effectively. We can go from here.

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: 9,794
9,794 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

9,794 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

1,024 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
My compressor for my window AC unit will not stay on during
My compressor for my window AC unit will not stay on during the heat of the day long enough to cool a room, noi matter the size … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
9,794 satisfied customers
Air is only coming out of my vents intermittently while the
Air is only coming out of my vents intermittently while the outside unit continues to run. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Hvac- my AC is not kicking on. Rodgers brand thermostat. Set
Hvac- my AC is not kicking on. White Rodgers brand thermostat. Set on cool with fan on auto. Inside it's 80 and the thermostat is set on 73. I've been away a week and came home to no AC. What can I do… read more
HvacmanSean
HvacmanSean
Owner
HVAC
233 satisfied customers
I live in Florida. I have a Rheem AC about 5 years old. I
I live in Florida. I have a Rheem AC about 5 years old. I keep AC at 72. When I go to work I set thermostat to 77 or 78 and drop it to 72 when I come home. House cools off in 15 to 30 minutes. For the… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Hi..I recently installed a Pioneer brand mini split HVAC 18k
Hi..I recently installed a Pioneer brand mini split HVAC 18k btu system with heat pump...It works great, heats good, cools good, however in the cool mode the fan never stops running, even after it get… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
9,794 satisfied customers
My Trane XE1000 heatpump turns on auxiliary heat when on Auto Cool.
My Trane XE1000 heatpump turns on auxiliary heat while set to AUTO COOL. I turned the mode switch to off and the fan kept running for hours.… read more
ComfortZone
ComfortZone
Associate Degree
485 satisfied customers
I noticed today that the house wasnt as cool as normal. I
I noticed today that the house wasn't as cool as normal. I noticed fan was on "ON" rather than "AUTO". I moved to "AUTO" and adjusted thermostat down a few degrees. A few hours later it was 4 degrees … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Our air handler is not coming on-line with the compressor.
Our air handler is not coming on-line with the compressor. It started yesterday evening. The thermostat kicks on the compressor but the internal air handler was not running at all. After trying to pow… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a Lennox Diplomat 80mgf, went to turn on the A/C yesterday,
I have a Lennox Diplomat 80mgf, went to turn on the A/C yesterday, the outside unit came right o and I could feel cold air coming into the HVAC unit but the blower never came on. When I switch it back… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
We live in Florida, and when we go north for the summer were
We live in Florida, and when we go north for the summer were told to set the dehumidistat at 60* and the thermostat at auto, cool and 70 degrees. If it is set at higher than 70 we may have mildew. My … read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
on monday night we smelled something burning or overheating.
on monday night we smelled something burning or overheating. we decided it came from the central a/c. when we turned it off at the thermostat the fan kept running, but sounded like it was running slow… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,010 satisfied customers
What could be the problems if my furnace works, but when I
What could be the problems if my furnace works, but when I switch the airconditioner on it doesn't come on?… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
What is the most efficient temperature to set a Honeywell thermostat a
What should I set my Honeywell thermostat and my Honeywell humidity control to prevent mold and mildew problems, and save on electricity costs for the period may through December, in Florida?… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
9,794 satisfied customers
On my Honeywell thermostat what does the CIRC fan feature do?
I have a programmable Honeywell thermostat installed by BGE. When I turn the system to OFF the fan indicates Auto and does not operate. After a few hours the fan also goes to ON and begins to blow eve… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
we recently moved in and dont know how old the system is
we recently moved in and don't know how old the system is we are in florida and have a humidstat conneceted to the thermostat the ac doesn't shut off even when it is not calling for the ac to be on wh… read more
Bart Jay
Bart Jay
Vocational, Technical or Trade Scho
596 satisfied customers
I live in a condo w/ central AC and Heat. After a couple years,
I live in a condo w/ central AC and Heat. After a couple years, I noticed HVAC not moving any air, and called a HVAC contractor. Turns out there is an airfilter in the AC unit in my ceiling I had neve… read more
Patrick
Patrick
Bachelor's Degree
1,269 satisfied customers
ac blower does not respond to fan control on tstat. It runs
ac blower does not respond to fan control on tstat. It runs constantly even when compressor if off. I cut power to unit and then the fan would not come on at all (compresser does) and remained off for… read more
Kenton Guidry
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
I ran the A/C for a few minutes last night and then switched
I ran the A/C for a few minutes last night and then switched back to heat. When I woke up this morning, the house was too cool and I can't get either the heat or A/C to work. I can't even get the fan … read more
coolman1973
coolman1973
AC/Heat Tech
Vocational, Technical or Trade Scho
162 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