HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

we are trying to hook up a honeywell auto thermostat RTH7500…

Customer Question
we are trying to hook...
we are trying to hook up a honeywell auto thermostat RTH7500 it is a second unit we have a split system with gas and electric heatpump. we have this same thermostat downstairs and we are trying to get this one upstairs installed. We have it wired but it will not come on. we talked to technical services but did not get anywhere do you have any help. We have codes set to 170-7, 270-9 , 330-2, 640-12. thanks
Submitted: 8 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 4 minutes by:
2/21/2010
HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,333
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified
When you say it will not come on. Will the fan run in the on position. Did you turn power off to unit when you installed thermostat. Rus
Ask Your Own HVAC Question
Customer reply replied 8 years ago
no the fan will not come on. nothing will run. It will click like it is going to tell it to come on but nothing happens. No the power was not turned off when installing. and we have flipped the breaker off and back on to make sure it was not the breaker.
HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
Go to what ever you are controlling with this thermostat. Sounds like you blew a fuse. It will be located in line on 24 volt transformer or on fan or igniter board. What Model is your unit. Rus
Ask Your Own HVAC Question
Customer reply replied 8 years ago
It is not the unit we are trying to fix we are trying get a new honeywell automatic thermostat installed. My husband is checking the fuse now but we don't think it is a fuse.
HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
I wanted to know model so I could tell you were fuse is located. Rus
Ask Your Own HVAC Question
Customer reply replied 8 years ago

 

 

It is a Frigidaire split system with gas and electric heatpump. the unit is about 8 years old. There is a large unit in the basement and a small unit in the attic one controls downstairs and one controls the upstairs.

HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
Thank you. How about the fuse. Do you have a voltmeter. I will pull manual. Rus
Ask Your Own HVAC Question
Customer reply replied 8 years ago
no I don't have a voltmeter (don't know what that is) Do you know where we need to look for the fuse?
HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
Just look inside blower door on furnace and check to see if lights are on. If not the fuse should be on fan board. Rus
Ask Your Own HVAC Question
Customer reply replied 8 years ago
okay I will check for the fuse. I think I may have to call the repair man tomorrow. thanks
HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
Your welcome.
Ask Your Own HVAC Question
Customer reply replied 8 years ago

I found the fuse. It is blown how do I keep from blowing it again

 

HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
You just touch the wrong wires together at thermostat. Replace it and everyhting should work. I will be here 4 more hours. Good Job
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,333
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified
gotoman for ac and 87 other HVAC Specialists are ready to help you
Ask your own question now
Customer reply replied 8 years ago

I am going to go and buy a fuse do you know about the thermostat does it sound like it was hooked up correctly?

HVAC Technician: gotoman for ac, HVAC Technician replied 8 years ago
Yes it does. I blow fuses all the time trying to hook up thermostat hot. Rus
Ask Your Own HVAC Question
Was this answer helpful?
Ask gotoman for ac Your Own Question
gotoman for ac
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,333
5,333 Satisfied Customers
Experience: 51 years of experience install design and repair of all makes and models of AC

gotoman for ac 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
Exhaust fan runs continuously. Furnace set to Auto,
Exhaust fan runs continuously. Furnace set to Auto, thermostat set to lower temp than ambient temp … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
58MSA-100 no display at thermostat. no heat. led status
58MSA-100 no display at thermostat. no heat. led status light is on solid, no flashing. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Climatemaster 12000 btu console WSHP whose
I have a Climatemaster 12000 btu console WSHP whose compressor kicks off after 2 minutes. Tried fixing 5x and just want to replace the unit. I've gotten quotes between $3800 (Iceair) to $4900 (Trane) … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Ac thermosts off, and ac is on and blowing. I'm not sure I
I'm not sure I haven't used eitheir the heat or ac in a few months. Due to the blower was not blowing. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I'm in touch with you regarding my Goodman GPC1336H21AB
Hello!My name is ***** ***** I'm in touch with you regarding my Goodman GPC1336H21AB Furnace & Air conditioner combo.I have attached a picture of the unit, and offer the following explanation as to wh… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Our thermostat ints not working, the whole night it was so
our thermostat ints not working JA: I'll do all I can to help. Tell me a bit more about what's going on so we can help you best. Customer: the whole night it was so cold JA: Is there anything else the… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
hello , druing the night my furnace quit,, and i have just
hello , druing the night my furnace quit,, and i have just installed a chromlox HAF320D ,,, it is used, it works ok but the motor will not shut off,,runs continuos ,i check the block where the thermos… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
My Infinity 96 in ac mode with fan selector in either high
My Infinity 96 in ac mode with fan selector in either high or auto will always run on med speed. When the home reaches it's cool and the ac compressor shuts off, the fan speed goes into high (if I hav… read more
Wvfan79
Wvfan79
Mecanical Designer & Estimator
High School or GED
775 satisfied customers
I have a White-Rodgers #1F78 5/2 Day programmable thermostat.
I have a White-Rodgers #1F78 5/2 Day programmable thermostat. Setting is currently on Cool - Auto. Thermostat reads 75 degrees. Temperature setting keeps defaulting to 85 even after lowering it to 74 … read more
gotoman for ac
gotoman for ac
HVAC Technician
5,333 satisfied customers
my hotel has a 5 wire,277v thermostat controling a 2 speed
my hotel has a 5 wire,277v thermostat controling a 2 speed fan coil 4 pipe system .we would like to switch to a 24 volt automatic thermostat with digital readout .a 6th wire is difficult to add.any id… read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
I have a 96 weather king that turns on fine outside manually
I have a '96 weather king that turns on fine outside manually when I push on the relay contactor but I cannot get it to communicate with the thermostat. I tried a Goodman and it worked with that for 4… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
I have a problem with a Skuttle humidifier, F60-2. The symptoms
I have a problem with a Skuttle humidifier, F60-2. The symptoms are one, the flushing timer isn't working - you turn the setting swithc on the timer (Skuttle 00S-HAFT-000) and it clicks but nothing ha… read more
Al-Moderator
Al-Moderator
High School or GED
We have an Amana Distinctions air conditioning unit and an
We have an Amana Distinctions air conditioning unit and an Amana Distinctions gas furnace (92.1 AFUE). Both are less then 3 years old. My questions concerns furnace blower speed when the AC is running… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Whirlpool Furnace, Model # NUGG075DF01 Just lit pilot light OK.
Whirlpool Furnace, Model # XXXXX Just lit pilot light=OK. Furnace fires=OK. Turn fan on thermostat to 'ON' fan works=OK. With all covers on and secure, furnace fires, but fan does not come on automati… read more
Kenton Guidry
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
Recently added an addition (Laundry Room and Powder room) to
Recently added an addition (Laundry Room and Powder room) to my house, however now that it is cold out, the addition stays about 6 or 7 degrees colder than the rest of the house. Both rooms have a hea… read more
The Home Smithy
The Home Smithy
Home Improvement Repair Consultant
1,890 satisfied customers
Carrier Furnace 58DXA acting just like previously answered question...
Furnace cuts off, has to be restarted manually, is unreliable. Carrier 58DXA installed January 1992.… read more
Ken Anderson III
Ken Anderson III
Vocational, Technical or Trade Scho
14 satisfied customers
my new maytag furnace will not warm my condo from 66 degrees
my new maytag furnace will not warm my condo from 66 degrees at night to 72 degrees in the morning within a three or four hour time period. The furnace fires up and then cycles down numerous times war… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
How do I avoid drain freezing from my attic gas furnace. I
How do I avoid drain freezing from my attic gas furnace. I have to run the drain 40 ft in a cold attic.… read more
Brian
Brian
Architect
Bachelor\u0027s Degree
2,905 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