Question about Honeywell Programmable Thermostat Heater

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Honeywell CT200A thermostat battery will not recharge.

Original battery holder and rechargable AAA battery replaced. New rechargable batteries used. Clock will operate but ONLY until battery runs down. The themostat is not recharging the battery.

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  • Honeywell Master
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Yes the battery charge circuit is burned out, you might as well replace the thermostat, parts will not be made to fix it unless it is still under warranty.

Posted on Nov 29, 2016

4 Suggested Answers

Therinnaiguy
  • 1420 Answers

SOURCE: locked themostat

go to this link, www.honeywell.com. In the search box, type in the model number.

Posted on Aug 07, 2008

  • 19 Answers

SOURCE: I want to install honeywell RTH 221 thermostat.Thr

If your old stat operated on high voltage ( anything over 24 volts) then the answer is no. However by adding some relays and a transformer you can use that stat.

Posted on Jan 15, 2010

dorothyslaug
  • 5 Answers

SOURCE: The middle of the touchscreen of my Honeywell

it not a touch screen, its manual old style honeywell, square box, not round, not rectanglur.

Posted on Nov 03, 2013

Testimonial: "It is a touchscreen. I have seen references to the battery being round and lithium CR2450; however, not sure if this is accurate. Does anyone know?"

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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1 Answer

My chronotherm III repeated flashes replace batteries after I've replaced them


Did you make sure the batteries are brand new? Batteries that has been sitting around and then used may not be powerful enough. They lose power over time. Get fresh batteries and try again and make sure that you have put the batteries in the right direction as listed in or around the battery holders. Good Luck! (note: it just might be possible that if you put the batteries in the wrong way, it messes it up. But this is rare to happen.) Check your manual if you have it.

Aug 30, 2014 | Heating & Cooling

1 Answer

Honeywell cm61 wireless programmer switches heat on before set time


Overlapping time periods can cause a lot of trouble. Removing the battery's will erase any programming that may have been done before now. The factory program is just for basic operation and they don't normally have any schedules or operational customer programs in them. The factory program will not be affected by removing the battery's. It's also much easier to do all this while sitting at a table and not hunched over at the wall. Remove the old battery's and replace them with new ones. The battery's are used to store your programming so be sure to put good battery's back in before starting. I will change this to use the word "Program" in place of the word "PERIOD" that I am most familiar with. Its a little complicated, but I think it will solve your problem. --------->One "SCHEDULE" covers a 24 hour block of time or One Day. Each block of time in the schedule from a "start time" to a "stop or temperature change time" is one "PROGRAM" in the "SCHEDULE". Here is an example of how to program one complete "SCHEDULE", (One day of 24 hours) Containing 4 Programs . ----- Get a large piece of paper and write down EXACTLY what you want your thermostat to do in ONE, 24 hour day. THE EXAMPLE> ----- You want your furnace to start at 5:00 AM and warm the house to 72 degrees by 5;30 when you get up. Write down "72 degrees from 5;00 AM to 6;30 AM", or when you expect to leave the house. Then write down "62 degrees from 6;30 AM to 4;00 PM" or 30 minutes before you expect to be home. Then write down "72 degrees from 4;00 PM to 10;30 PM" or when you expect to go to bed. Then write "62 degrees from 10;30 PM to 5;00 AM" or 30 minutes before you expect to get up.-----< You have just covered a 24 hour period of time using 4 Programs and created ONE "SCHEDULE". Each day of the week needs a schedule. Various thermostats are different in how they handle schedules. You will need to read your "Owners Manual" to find how your thermostat arranges its schedules. To get started, look for a "SET" button or touch sensitive area on the display screen. If there is no SET button you can see, check your manual for the button to press to put the thermostat in its programming mode. With some thermostats, the display will blink or change color to let you know you are programming. While in this mode, use the temperature set point arrows ( up and down) to scroll through all the different things that can be set ( Programmed ). When you hit one you are looking for, press the left and right arrows or buttons to set that function or time where you want it. Press the up and down arrows to get to the next adjustment, use the left and right arrows or buttons as before to set that function. Keep doing this until you have gone through all the various functions and set points for one 24 hour day. DOUBLE CHECK all your times and temperature changes against the desired operation you wrote down. Be extra careful none of your start and stop times for the temperature resets overlap each other. If you programmed in Holidays or special events you may have, be sure the TIME and DATE are correct. Press the "RUN" or "START" button to lock it all in and start your programs running. Again, be careful of overlapping the times in each "PROGRAM" of each daily "SCHEDULE". Overlapping times can keep your system running all the time, starting and stopping or changing temperatures, or maybe even not run at all. I hope all this will help you to better understand these complicated devices called thermostats. Thermostats are a deep subject and specific factory information in your owners manual may be needed to get you through. I hope this helps though. At least a little. The main trick to getting them right is to write it down before starting and make sure it covers a 24 hour day. Again, be extra careful of overlapping times from program to program and you should be OK. Good Luck. Roger.

Jan 26, 2014 | Heating & Cooling

1 Answer

White Rogers digital thermostat displayed "lo".


Thank you for your interest with Emerson White Rodgers. My Name is Joselito Laxamana from technical department. After replacing the battery you need to do the reset operation. If you need further assistance please contact us at 1800-284-2925.

Sep 24, 2012 | Heating & Cooling

1 Answer

The screen said to replace the batteries. When I put new ones in, the screen did not come back on.


One or both of the batteries may be facing the wrong direction. Remove the batteries and check the battery holder for installing in the proper direction. Also, check the batteries you installed to make sure they are at full power.

Jul 28, 2011 | Honeywell Programmable Thermostat Heater

2 Answers

Everytime i replace the battery in my thermostat it says low battery


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.

Sep 22, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

I want to install honeywell RTH 221 thermostat.Thr thermostat operate 2 AAA batteries. the thermostat remote the heating system selonoid valfs. They works with 220 volts.My question is can I connect the...


If your old stat operated on high voltage ( anything over 24 volts) then the answer is no. However by adding some relays and a transformer you can use that stat.

Jan 15, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Batt Lo Displayed. I replaced with new batteries. The display still reads Batt Lo and I cannot changed temperature, etc.


sometimes you can bend out the battery holders to allow more tention on the batteries but thats only a temporary repair. a new thermostat is needed

Oct 28, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

I have a Honeywell ST499A/ST699B "Central Heating Microelectronic Time Controller" managing the operation of my house boiler. The time controls are set properly. PROBLEM: If I want either hot water or...


I have an old Honeywell ST499A/ST699B thermostat. It still works OK but when we have a power cut I have to re-programme everything. Presumably this is because the battery needs replacing. I cannot find a way of opening the control box to get into the unit to replace the battery and in any case I’m not sure if the battery is renewable?

Oct 12, 2009 | Honeywell Programmable Thermostat Heater

2 Answers

Flashing battery symbol


I had this same problem today.  I called Honeywell and they said the flashing broken battery symbol may mean low batteries, or it may mean the battery type is incorrect.  They recommend only non-rechargeable alkaline batteries.  I was using rechargeable NiMH batteries.  Even though they were fully charged, I had the flashing battery symbol and the thermostat relay would not work.  I replaced with alkaline, the flashing battery indicator went out, the thermostat works again.
Odd that it worked for 3 months on the rechargeables after first install. I did notice the broken battery symbol came on after the first few days, but I checked the battery charges and they were good, so I disregarded the symbol until the thermostat stopped working today.  Apparently there is something about the NiMH performance characteristic that the thermostat doesn't like.

Jan 31, 2009 | Honeywell Programmable Thermostat Heater

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