Question about Honeywell Programmable Thermostat Heater

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I have a honeywell round thermostat.The top sais 75 (thats what I have it on) but the bottom only reads 62! And dropping.If I manually turn it off.Then turn it back on slowly..it kicks on.Otherwise it just sits and gets colder and colder in here.This just happened today.If its not dead,why is it not kicking on like it usually does? Like its supposed to.? its usually right on exact.If the top is on 70 then the bottom sais 70.Its awlays been exact.But now...when it kicks on my furnace...the furnace runs so HOT that you cant even lay your hands on the vents because it will burn your hand.Im a single mom home alone. I dont know what to do.

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Is it an old mercury type that is out of level?

Posted on Feb 28, 2009

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I bought a Honeywell RTH8500 thermostat and I can't get the temperature to go down past 75 degrees


You will need the installation book that came with the thermostat. There is a way to enter into the programming of the thermostat from the home screen. From there, you will need to find what code is the temperature settings in the manual, they are usually all 3 digit numbers. Once you find the code for the setting your looking for which is the lowest temp for the thermostat, it will have a 75 to the right of it which you can set a lower number. Sorry I do not have the manual right now to just tell you exactly how, but hope this still helps!

May 28, 2012 | Honeywell Rth8500d 7-day Touchscreen...

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We have a fairly new furnace. I have the temp set at 65 the furnace only runs for 3 min at a time and comes on every 5 min. This sounds extreme to me?


It depends on the differential that you have programmed into the thermostat. In most of them you can set the temperature you want the thermostat to activate, and then you set the run differential such as three degrees below 65. In other words, the thermostat will activate at 62, and drive the temperature up to 65, cut off and wait for the temperature to drop to 62, where it cuts on again. see:

http://yourhome.honeywell.com/home/Products/Thermostats/

Check http://homeappliance.manualsonline.com/manuals/mfg/honeywell/8000.html to see if you can find the manual if you have lost yours.

Dec 07, 2010 | Honeywell Heat/Cool Thermostat

1 Answer

Honeywell Thermostat Lock Cover


Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.

May 31, 2010 | Honeywell Electronic Programmable...

1 Answer

How to use a round circular honeywell thermostat? I turned round casing to mark heat , no heat on??


If you turned the ring and the pointer moved, then you are using the thermostat correctly. Turn the thermostat up above room temperature (the temp on the bottom of the thermostat) Make sure all your switches are on, and that the fuse or circuit breaker is also on. If you still do not have heat after verifing all these things, then it is most likely a problem with the heating appliance.
Also, if it is a heating and cooling thermostat, make sure your lever is in the heating mode. Hope this helps

Sep 17, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

How to program HONEYWELL T8095A1002 Mechanical Programmable Thermostat


Go to honeywell.com
under welcome sign
bottom red box
type in t'stat model#
click on arrow to the right
click PDF file with owners manual

Aug 07, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

My Honeywell TH4210D1005 Thermostat will not respond


well with 62 outside temp and then maybe a little solar gain and body heat you very well could be 5 degrees warmer then outside

Apr 06, 2009 | Honeywell TH4210D1005 Heater

1 Answer

Have gas furnace and this winter,began having


The Thermostat Wizard is an interactive tool that will guide you through wiring and troubleshooting your thermostat, as well as programming it to the most comfortable settings for you and your family. Simply answer the questions from the Thermostat Wizard to correctly connect, troubleshoot and/or program your Honeywell Thermostat. You can even print the instructions and bring them right to the thermostat to help make things easier.
Go to: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Support/Thermostat+Wizard/

However - the problem is probably not with your thermostat but with your furnace. It is most likely a dirty flame sensor - a maintenance issue. If you have not had your furnace serviced recently (more than 1 year) that is where you should start. Modern furnaces require regular maintenance.


Please rate my answer!

Feb 28, 2009 | Honeywell Electronic Programmable...

1 Answer

Why can't i get my thermostat to work


HONEYWELL WEBSITE:
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions

Oct 22, 2008 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

Honeywell round mercury thermostat - heat not coming on


If you tip the mercury switch so that it makes contact and the furnace doesn't start, it isn't the t-stat. Check the connections, then start checking the furnace.
In any case, ditch the mercury t-stat (recycle it properly) and get a new programmable one if at all posible. It will pay for itself many times over by turning your heat down in the middle of the night and back up by morning.

Feb 09, 2008 | Honeywell CT87B ROUND HEATING&COOLING...

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