HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a Honeywell digital programable thermostat

Customer Question
I have a Honeywell...

I have a Honeywell digital programable thermostat TH4210D1005 that is blinking I suppose needs a new battery. I am 88 ears old, the house is cold! How do you open this up to replace the battery? The directions are not comprehensible-print too small.

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

I think it needs a new battery

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

If its just a matter of changing a battery I do, but if its complicated, no

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

Maybe a pair of new eyes

Submitted: 6 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 48 minutes by:
11/29/2017
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,238
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

To get to the batteries you need to pull the front cover off. You do this by pulling the bottom of the thermostat away from the wall. You'll see the batteries at the top of the back plate once you have it off. Note how the batteries go in before you remove them becasue you'll lose the time and date (and have to reset it) if it takes more than a minute to swap them out. Usually a minute is plenty of time. Then hook the thermostat onto the back plate at the top and push it back into place. If it's aligned properly it will snap into place easily.

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: 7,426
7,426 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

7,426 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

1,019 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
How do I turn off adaptive intelligent recovery on a
Hi - how do I turn off adaptive intelligent recovery on a honeywell 9000? I want it to change the temperature setting when I set it to, not when it "thinks" it needs to start to reach that temp at the… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I am an architect and working on acoustic credit on LEED v4.
I am an architect and working on acoustic credit on LEED v4. I want to know the background noise of the HVAC system. They are the Trane 4TVD0048C100N. … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,892 satisfied customers
A hollow conduit from the outside comes into the house. i
a hollow conduit from the outside comes into the house. i put the edge of a piece of toilet paper near the opening while inside the house and a/c running. all doors and windows closed. there are no ce… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Re: Air conditioner not cooling enough. Outside temp at 90.
Re: Air conditioner not cooling enough. Outside temp at 90. Set at 72 on cool. 3 ton York. Upstairs. What should air temp be at exit of vent and at entrance of return or the difference?… read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
I keep my ac at 74 during the day and turn it to 72 in the
I keep my ac at 74 during the day and turn it to 72 in the evening when I get home. This evening I noticed it reached 72 but kept running. I turned it to 73 and the unit did not switch off...I waited … read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
I have a Takagi T-KJr instantaneous hot water heater and
Hi I have a Takagi T-KJr instantaneous hot water heater and it's not working properly … read more
canuck the pro
canuck the pro
257 satisfied customers
I have the strange xr12 condenser. It runs & runs but no
I have the strange xr12 condenser. It runs & runs but no cool air at all. Is there a reset switch? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I NEED A BEAUTY PLATE FOR YOUR THERMOSTAT MODEL RTH7560E.
Second opinion] I NEED A BEAUTY PLATE FOR YOUR THERMOSTAT MODEL RTH7560E. CAN YOU SUPPLY / … read more
David Bowden
David Bowden
Owner
1,030 satisfied customers
I have a trane ac unit that has the code 114. All checked
I have a trane ac unit that has the code 114 JA: Did you double-check the thermostat? And what about the unit's filters? Customer: All checked and good JA: Do you plan on doing the work yourself? Cust… read more
Phil
Phil
Mechanical Engineer
7,426 satisfied customers
What is the standard rotation of a Baldor cl3514 electric
What is the standard rotation of a Baldor cl3514 electric motor? If it is clockwise, is that clockwise as viewed from which end of the motor? The face, shaft side or the rear, the winding side? … read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,019 satisfied customers
Ac unit cycles on and off every few seconds. When I unplug
ac unit cycles on and off every few seconds. When I unplug the compressor, the fan will turn and remain on, but obviously no cool air. … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Took the top off of the ac unit and cleaned it out (Light
Took the top off of the ac unit and cleaned it out (Light spray). Put top back on and the fan will run for a couple of seconds and then kicks out. Unit will run as long as I hold the contactor in. Wha… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,892 satisfied customers
Where is the reset button on a Honeywell GS640ybrt 300water
Where is the reset button on a Honeywell GS640ybrt 300water heater? … read more
Rick
Rick
HVAC Supervisor
24,238 satisfied customers
Wish to replace my 15 years old reverse cycle air
Wish to replace my 15 years old reverse cycle air conditioner. Is it possible to leave the ceiling ducting intact ,even if I buy a different brand of air con. ?… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a trane xe1200 it is not currently working. Switch
I have a trane xe1200 it is not currently working. Switch pulls in and I here humming but fan does not kick on or compressor. I replaced both capacitors. … read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,019 satisfied customers
Need help wiring a Nest Gen3 with a Weather unit and a
Need help wiring a Nest Gen3 with a Weather King unit and a control board made by UT ELECTRONIC CONTROLS #1012-925 … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
What compressor would a American Standard hp model
What compressor would a American Standard hp model 6h2036a100a3 take? I am thinking of ordering one … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I had a man put a new chimney liner in today. But now my new
I had a man put a new chimney liner in today. But now my new AO Smith hot water heater will not turn on - can you help me? … read more
canuck the pro
canuck the pro
257 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