HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a carrier thermostadt, 97-4904 or T8600C1188-HH641-101,

Customer Question
and right now it says...
I have a carrier thermostadt, 97-4904 or T8600C1188-HH641-101, and right now it says "-AC" where it should say the degrees. Everything else is correct. This is the first time this year that I was going to run the A/C and I switched the thermostadt to cool before I flipped the circut breaker for the A/C on. I was wondering how to get the message off the screen. It doesn't change even if I switch the thermostadt to heat instead of cool.
Submitted: 8 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 1 minute by:
6/26/2010
HVAC Technician: Mark Henley, Journeyman Technician replied 8 years ago
Mark Henley
Mark Henley, Journeyman Technician
Category: HVAC
Satisfied Customers: 3,217
Experience: UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential
Verified
Chat Conversation Started
Mark Henley :

Hi, the -AC means you have lost 24 volt power, either you have lost 24 volt power or the thermostat is defective, when you put the fan on does it come on ? Does anything run ?

Customer:

no, nothing happens when I put the fan on. Nothing changes on the display and no air comes out of the register.

Mark Henley :

Hi, ok you lost 24 volt power mroe than likely, there should be a circuit board in the furnace with a small blade type fuse usually purple 3 amps, you need to get to that and check it. This could also mean that you just do not have power on at the furnace also, so check the breaker and or fuses for it, there may also be a switch to power the furnace on, near the furnace usually on the side of it.

Customer:

I got the fuse out, looks like is blown, will replace, hopefully it works!

Mark Henley :

Good, it should, though there is a reaon that it blows, it could have been a one time thing but if it blows when you restart it you are going to be looking for a short in your wiring, you may need a tech to resolve that if it comes about.

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 Mark Henley Your Own Question
Mark Henley
Mark Henley
Mark Henley, Journeyman Technician
Category: HVAC
Satisfied Customers: 3,217
3,217 Satisfied Customers
Experience: UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential

Mark Henley 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

7,634 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
The Up and Down buttons on my thermostat are not changing. Help!
I have a LUX thermostat. The up/down buttons are not changing when I press either one of them. I'm stuck at 82.… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
I have a Carrier Infinity system and it is 76 degrees
I have a Carrier Infinity system and it is 76 degrees outside and the thermostat says 82-thermal lockout 4 hours... How do I correct this as it is not cooling the home?… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
It's the weekend and 110 degrees heat index. My HVAC system
Hi Tom. It's the weekend and 110 degrees heat index. My HVAC system is 10 years old and my A/c tech bypassed the high pressure switch in order to give us some relief until supply stores open on Monday… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I tried replacing my Honeywell thermostat with a wifi one.
I tried replacing my Honeywell thermostat with a wifi one. Could not get the wires to fit. Put original back on wires in the same place and cooling won't come on. I can turn fan on but other system wo… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
I have a honeywell th6220d1002 that is hard wired. It lost
I have a honeywell th6220d1002 that is hard wired. It lost power and now will not work even with batteries. The honeywell lady said it was something in the wiring and not the thermostat. I tried the "… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
i am trying to connect a honeywell thermostat to goodman furnace...
i am trying to connect a honeywell thermostat to goodman furnace... looking for C wire connection from therm to other end.... i connected the blue wire to the C connection on the thermostat and at the… read more
theplumber717
theplumber717
Plumber
Vocational, Technical or Trade Scho
791 satisfied customers
my carrier 58PAV furnace wont cool when outside temp is lower
my carrier 58PAV furnace won't cool when outside temp is lower than inside. I think furnace is trying to run on heat pump instead of AC and runs al night to cool house when we have warm day cool night… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
We ordered two carrier systems (AC & Gas furnaces) online with
We ordered two carrier systems (AC & Gas furnaces) online with a TP-PRH01 edge thermostat & controller. My brother-in-law works for a HVAC company, but they mainly do large installations... i.e.: WalM… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
my "cool on" temp is stuck at 82 and I cannot change it. My
my "cool on" temp is stuck at 82 and I cannot change it. My house is hot. I've got the temperature set down to 70 and it still won't cool.… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a 2.5 ton Rheem criterion II. I recently replace the
I have a 2.5 ton Rheem criterion II. I recently replace the electrical board unit thing, because the indoor fan wouldn't turn off. Now it won't go on when I flip the on switch on my thermostadt. It on… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
I have a carrier a/c system with a honeywell thermostat. When
I have a carrier a/c system with a honeywell thermostat. When I was changing the filter, I turned off the system but the fan kept going. So, being impatient, I manually tripped the safe-t-switch. Now … read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,010 satisfied customers
I just purchased a house in Florida with a LENNOX High Efficeincy
I just purchased a house in Florida with a LENNOX High Efficeincy HVAC system. I assume this runs off electricity ? correct? Also I would like to know if the A/C side ecan be controlled with an humidi… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
If I turn on the AC - the unit outside clicks on as expected
If I turn on the AC - the unit outside clicks on as expected and the fan in the house kicks on as expected, but it does not cool. Changed the filter (sad to say it was long overdue) but to no avail. T… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
We have a goodman heat pump and it isnt coming on. The weather
We have a goodman heat pump and it isn't coming on. The weather is cold (low 20s and 30s) and I wonder if there is a rest button or something we can check without calling a service tech. Our house is … read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
Trying to replace my Carrier Digital Therm with the Honewell
Trying to replace my Carrier Digital Therm with the Honewell RTH7600 programable to my Carrier heat pump. Everything matched great except the old therm has both a W1 and a W2. Is there a conversion di… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Brand new house, moved in yesterday.. A/C worked great first
Brand new house, moved in yesterday.. A/C worked great first day.. won't turn on now. Burning up! Have also tried reseting circut breaker for A/C..still nothing. The screen shows "Recovery" "Leave" an… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I have a newer Carrier 90% plus system installed in 2007...
I have a newer Carrier 90% plus system installed in 2007... the system runs very long to get to the set pont. Technician was here about two weeks ago and reset one of the dip switches for the CFMs to … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
We have 2 zone heating/cooling and have a Carrier heat pump
We have 2 zone heating/cooling and have a Carrier heat pump for each zone. This weekend, the temps soared to ~90 degrees and we turned on the air for the first time this season. The upstairs unit cool… read more
Bart Jay
Bart Jay
Vocational, Technical or Trade Scho
596 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