HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I had a honeywell t stats go out. bought a new wifi stat.

Customer Question
I had a honeywell...

I had a honeywell t stats go out. bought a new wifi stat. honeywell also. the equiment i have is as follows: trane compressor XR15, Trane furnace heatpump with gas backup XB80 model tue080a948l3. the furnace has five wires to connect to, so i also have a honeywell interface module thm5421c, i guess this is to make the connections work for older furnace unit? the new stat is rth8580wf1007. i need to know if they are compatible, if so i need to know how to wire the stat, the module and the furnace

Contractor's Assistant: Thanks. Can you give me any more details about your issue?

Well like what?? that was pretty comprehensive

Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 1 hour by:
3/9/2016
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago
HvacmanSean
HvacmanSean, HVAC Technician
Category: HVAC
Satisfied Customers: 238
Experience: Owner HVAC company
Verified
Ill check into this and see if I can help
Ask Your Own HVAC Question
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

I looked into this, What is full model number THM5421C1008/U ??? is that it?

IF it is, The thermostat you purchased will not work and you will need to get the thermostat that matches that equipment which is TH9421 VisionPRO IAQ Thermostat

How many wires do you have at that the thermostat now?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
the module just shows thm5421c, i have 5 wires there now, the heat works but only the gas, NOT the heatpump (compressor not coming on)so the module is to connect the newer xr15 compressor to the older furnace i guess. so is there another option besides the module, can it b e bypassed? if not then i guess i have to spend the big bucks on the correct stat. if that is the only option, do you know the wriing diagram then for the module?
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago
Im out for a little while as soon as I get home ill dig into this and we will figure out a solution. It may require some pictures to send to me if you can.
Ask Your Own HVAC Question
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

would you like to work on this?

Ask Your Own HVAC Question
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
I called Honeywell, bypassed the module, dont need it, programmed stat, 5 wires ok, air came on. But fan in auto mode stayed on. Need more programming, honeywell has a case number, ill chk more today
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

Alright ill hold tight if you have any questions ill help ya.

If you wanna try and fix it we can ?

Ask Your Own HVAC Question
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

Just wanna touch base with you and see if Honeywell got ya squared away or if you have any questions.

IF you completely changed thermostats i would recommend Sensi if its not too late. Great easy thermostat!

Ask Your Own HVAC Question
HVAC Technician: HvacmanSean, HVAC Technician replied 2 years ago

If you can rate our conversation so we can close this out unless you need more help. Rating our conversation is the only way that we get paid for our time otherwise we make nothing for our time.

Ask Your Own HVAC Question
Was this answer helpful?
Ask HvacmanSean Your Own Question
HvacmanSean
HvacmanSean
HvacmanSean, HVAC Technician
Category: HVAC
Satisfied Customers: 238
238 Satisfied Customers
Experience: Owner HVAC company

HvacmanSean 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
Hi, Regarding that rheem high pressure switch Can I just cut
Hi, Regarding that rheem high pressure switch? Can I just cut the wires behind the switch and connect them to make it run?… read more
Tom
Tom
HVAC Technician
Vocational, Technical or Trade Scho
770 satisfied customers
hi, I have a mobile home coleman electric furnace, model 3115B750
hi, I have a mobile home coleman electric furnace, model 3115B750 with manual thermostat p/n 3110-377. It has been working good but last night I had nothing... no fan/blower and no heat. The thermosta… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Goodman TSTATG 1100 thermostat and I can not get it
I have a Goodman TSTATG 1100 thermostat and I can not get it to cool and even when I put it on fan it does not come on help! It was just installed Friday! How can I program it. I do not have any direc… read more
Tom
Tom
HVAC Technician
Vocational, Technical or Trade Scho
770 satisfied customers
I have a Rheem model 13Ajn24A01 outside condenser. Last
I have a Rheem model 13Ajn24A01 outside condenser. Last night I noticed the thermostat room temperate was 74 and the thermostat was set on Cool 72. I removed filter on inside furnace unit and saw fros… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Have a Carrier 48 GS,GX outside side by side furnace unit.
Have a Carrier 48 GS,GX outside side by side furnace unit. Model # 48ESA3006030. When furnace comes on not much air power from vents. Heat is warm sometimes gets room too hot, heat is never comfortabl… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My furnace unit is blowing cold air. I tuned off the unit
My furnace unit is blowing cold air. I tuned off the unit and checked all connections and restarted unit. The pilot light turned on and the unit ignited, it only stayed on for a few minutes and then t… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Honeywell Chronotherm III thermostat reads “Hold – AC”. Not
Honeywell Chronotherm III thermostat reads “Hold – AC”. … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a Heil furnace unit. Furnace running fine but blower
I have a Heil furnace unit. Furnace running fine but blower not working. Motor makes noise but doesn't spin blades. Blades move freely when no power to unit but stiff when motor is making noise. Tried… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Have a Nordyne gas furnace- unit mod#M1MB 077A AW - fails on
Have a Nordyne gas furnace- unit mod#M1MB 077A AW - fails on flame failure. Igniter glows,main flame comes on,goes into failure. When reset it will run for days and again have same problem. Could ther… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
My Ruud furnace unit shut off while I was unscrewing the
My Ruud furnace unit shut off while I was unscrewing the cover for the blower. I did not shut the system off before I started unscrewing the cover. I did hit the shut off switch after the unit shut do… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
How do I determine my new Goodmn furnace unit blowing
how do I determine my new Goodmn furnace unit blowing capacity so I can match with the correct filter … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a Carrier furnace unit and I want to know what size
I have a Carrier furnace unit and I want to know what size filter to use in it. I have been using the wrong size. … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
i have a coleman evcon heatpump/ central air handler
i have a coleman evcon heatpump/ central air handler, handler model: AH16-0 heat pump model: FRHS0421CA Have had problems over the last several years had the compressor replaced and that helped for a … read more
HVAC DOCTOR
HVAC DOCTOR
President
Vocational, Technical or Trade Scho
74 satisfied customers
We have a Lennox Elite Series Furnace, MN: EL296UH070XV36B-05.
We have a Lennox Elite Series Furnace, MN: EL296UH070XV36B-05. In the last couple of days it was not heating the home, falling to 58-59F tho it was set for 65F. I have gotten it to work twice now, by … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a trane HVAC system that has developed a sound like
I have a trane HVAC system that has developed a sound like an air raid siren (low) when it starts up. It does it briefly two or three times, about 30 sec. to one minute apart, while it sounds like it … read more
Mike
Mike
High School or GED
14 satisfied customers
i live in a condo. i have a mueller climatrol furnace/ac unit
i live in a condo. i have a mueller climatrol furnace/ac unit in my house. its a combo unit. model #750-1-201-07 serial #CH 51645. a man came and put stop leak in my system and filled it with freon. t… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
Our Heater stopped working. The unit is a ComfortMaker Model
Our Heater stopped working. The unit is a ComfortMaker Model #NBF050B12G1. I figured it was the Ignitor so I pulled it and cleaned it with 400grit. Put it all back together and the Thermostat is blank… read more
tinman
tinman
n/a
Vocational, Technical or Trade Scho
171 satisfied customers
I have a Lennox 80MGF(X)-7 that was installed in 1998 (12 years
I have a Lennox 80MGF(X)-7 that was installed in 1998 (12 years again). Started the furnace for the 1st time this season in chilly Southern California (I know, I know...) and furnace is making clickin… read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 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