HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Error code 91 on trance comforting ii

Customer Question
Error code 91 on trance comforting ii
Submitted: 2 years ago.Category: HVAC
Ask Your Own HVAC Question
Answered in 14 hours by:
2/4/2016
HVAC Technician: HVAC Guru, HVAC TECH replied 2 years ago
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 18,756
Experience: 20yrs in the HVAC industry with certificates and degrees.
Verified

Hello and thanks for using this service, if you have been waiting do not worry or get upset I am just one of the techs on here and I try to get to as many customers as I can and I just picked up your question now. Please give me time to respond sometimes I get your replies late so there may be a delay in my response.

That is a communication error on the unit. You should let it try to let it go for 30 minutes to reestablish communication. If it does not either the thermostat is bad or the board in the unit is bad. Normally this is a bad board in the unit that causes that issue if it does not get communication.

We are on the honor system for our time, all I ask is please rate my service using the STAR RATING SYSTEM on your page before you leave. If you are not happy with the service please let me know before leaving a negative rating. This is the only way I am paid or credited through the site for my time. This will also allow you to get directly back to me for FREE follow up questions and tips are greatly appreciated! Thanks

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 HVAC Guru Your Own Question
HVAC Guru
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 18,756
18,756 Satisfied Customers
Experience: 20yrs in the HVAC industry with certificates and degrees.

HVAC Guru 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
I have an American Standard Furnace and programmable
I have an American Standard Furnace and programmable thermostat controller in my house. My thermostat controller is indicating error code 91. Can you please let me know what this means and what my opt… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
TRANE CONTROLLER ON COMFORT LINK II HAS A RED LIGHT ON UPPER
TRANE CONTROLLER ON COMFORT LINK II HAS A RED LIGHT ON UPPER RIGHT SIDE AND FLASHES BETWEEN CORRECT SCREEN AND ERR 80. HAVE ANY IDEA WHAT IS HAPPENING … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have error code E1 on my comfort zone II thermostat. What
I have error code E1 on my comfort zone II thermostat. What does that mean? … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I have an error code 104 What does that mean, about 5 years
about 5 years old No message before, also has bright orange light on in upper right hand corner … read more
Daniel Plourde
Daniel Plourde
plumbing, hvac technichian
Vocational, Technical or Trade School
463 satisfied customers
My Trane comfortlink II thermostat is giving me an err 91
My Trane comfortlink II thermostat is giving me an err 91 message and the ac is not working. I live out in the country in Texas and it is over 100 degrees today. Anything I can do to get the AC workin… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I have a York split system with a Trane Comfort II XL 950 showing
I have a York split system with a Trane Comfort II XL 950 showing error code 126.00. If you have any information to provide regarding trouble shooting would be greatly appreciated. Respectfully, *****… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a trane comfort link II showing an error 79 with a red
I have a trane comfort link II showing an error 79 with a red snowflake on top right- could you please walk me thru it? Pam… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
i have error code 91 then error code 91 on programmable trane
i have error code 91 then error code 90 on programmable trane thermostat. what can i do? i removed the thermostat and could not find any loose wiring. i went if the attic and the air handler sounds as… read more
HVAC Guru
HVAC Guru
HVAC TECH
18,756 satisfied customers
Have a Trane comfort II thermostadt. Error code 126. Display
Have a Trane comfort II thermostadt. Error code 126. Display blinking, and red light blinking in upper right corner. What's going on? How to fix? Thank you. Rick… read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
Im getting error code 91 on my thermostat. Ive read that
I'm getting error code 91 on my thermostat. I've read that this means communication is lost between the controller and the unit and that it should reset itself within 30 minutes. It's been at least 10… read more
SWFLHVAC
SWFLHVAC
67 satisfied customers
I have an error 91 showing on my digital programable thermostat
I have an error 91 showing on my programable thermostat for a trane air conditioning XL20i. air conditioner stopped. The thermostat is a comfort link 11 (two)… read more
Wvfan79
Wvfan79
Mecanical Designer & Estimator
High School or GED
775 satisfied customers
What is Error Code 126 on Trane Comfort Link II thermostat?
What is error code 126 on Trane comfort link ii thermostat controlling xl20I heat pump? Optional Information: Make : trane Model : xl20i heat pump, comfort link ii thermostat error 126… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have an error 91 on my comfort link system, it is a Trane
I have an error 91 on my comfort link system, it is a Trane air-condition. My air-condition company says they can only look at it when the problem is occurring, but usually after a few hours it correc… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a Carrier comfort zone II ac unit with 3 zones. I have
I have a Carrier comfort zone II ac unit with 3 zones. I have always had an E5 error message on zone 2 & 3. My new problem is that zone 1 is working but I cannot adjust the temp on 2 and 3. The temp a… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,634 satisfied customers
I have a TCONT900AC43UA Communicating Programmable Comfort
I have a TCONT900AC43UA Communicating Programmable Comfort Control Thermostat - What is error code 91 and what should I do?… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
How do I fix error 126 on my trane comfort link II I believe
How do I fix error 126 on my trane comfort link II? I believe its a communication error. I have the xl20i unit.… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
i installed my first trane xl20i with a 4tee3c4a1000aa air
i installed my first trane xl20i with a 4tee3c4a1000aa air handler and a comfortlink ii control and the unit wouldnt fire up tstat read err 91 never a clear answer in the err adendum to help explain t… read more
Richard
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,416 satisfied customers
Getting error code 91 on acculink thermostat (same as trane
Getting error code 91 on acculink thermostat (same as trane comfortlink II). Heritage 20 compressor and 4TEE air handler. Fault LED is flashing three times and the comm LED is flashing fast. User Inte… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 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