Question about Honeywell Programmable Thermostat Heater

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Can't Program Clock for Honeywell RTH230B Thermostat

I just installed new batteries and went to program the clock by holding in the clk button but the hour, minutes and day all blink and I cannot change them. Help!!

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  • zitogp Oct 06, 2008

    I have the same problem. Installed new batteries and now clock readout continuously blinks and I can't stop it or change it.

  • samf56 Oct 09, 2008

    Same problem! It seems none can fix it?!

  • gregarious1 Jan 31, 2009

    I have two of these and encountered teh same problem on both - on one of the units I finally managed to get it into "set" mode, but have no idea how I did it as by that time I had been pressing various combinations of buttons and switches for 20 minutes. Honeywell's support site was worthless in resolving this....

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After you set the hr, min, and day, press the mode button.

Posted on Dec 21, 2009

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How can I disable the programmable function and just use as a conventional thermostat


5. Temperature Adjustment
Extended Hold (Vacation) Mode
1. Press the HOLD button to bypass the program schedule. The current set point temperature will be held either permanently or for 24 hours, depending on the setting selection made in section 4.

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2. Press the
HOLD button again to return the thermostat to the normal program operation.
3. The hold period will last until the hold is released as in step number 2 above, or is limited to 24 ours if the default was changed in the User Options Settings (see section 4).

4.Programming User Settings

Setting the Extended Hold Time (see also section 6)
The default setting is Long (indefinite) Hold. If the HOLD feature is activated, the current set point will be held until HOLD is released.
1. In normal operating mode, press and hold the
RETURN button for 4 seconds. Press RETURN again to skip past differential setting. The display will show "HOLD LG", where LG is indefinite hold.

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2. Press the or button to change the Extended Hold time from indefinite (LG) to 24 hours (SH).
3. Press the
RETURN button again to set the Filter Check Monitor or wait 30 seconds for the thermostat to return to the normal mode.

6.Additional Operation Features
Resetting the Thermostat
The Reset feature allows the user to completely reset the thermostat to register new manual switch settings.
1. To erase all entered programs, current time of day, day of week and other user settings, gently press the
RESET button using a paper clip or a small pencil tip.
2. This will return all thermostat settings to their default values and register all new manual switch settings for proper operation (incl.
Extended Hold = Indefinite).


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Dec 28, 2014 | Proselect PSTS21P52 Programmable 2 Stage...

1 Answer

My Honeywell T8001C doesn't allow me to change the indefinite temperature hold for some reason


It sounds like the thermostat is malfunctioning; the Set should not be flashing at all, only the Hld should show after pushing the hold button.
Do you have a new battery in the unit? Is it set to Heat or Cool? Is it already programmed for current Time/Date and does it have a schedule programmed in already? If you've lost the user manual it's here: https://customer.honeywell.com/resources/Techlit/TechLitDocuments/69-0000s/69-1431.pdf

Jul 06, 2014 | Honeywell Programmable Thermostat Heater

1 Answer

Thermostat says Heat On, but furnace is not running


Hi Juliegeee. I am Roger. I am going to download you a programming sequence I put together that will probably help. To test and see if it is the thermostat before reading all that I wrote hear, Jump or touch the two wires together on the thermostat and see if your furnace starts and stays running. If it does, this post I made will help you to get it going. There are many manufacturers making many different digital thermostats. With residential thermostats, the variations of types, methods of operation and how to program them has gone far past the market need to just plain crazy. The only reliable place (?) to get specific operations and program manuals for your particular product, would be from "customer support" at the "manufacturers" web site or phone number. The "Model", "Serial" and "Product" numbers of your particular thermostat are usually printed on a small piece of paper pasted in its cover somewhere. In most cases, Just the Name and model on the outside cover will be enough for identification when asking a question or ordering an owners manual. That said, here are a couple things that seem to be fairly standard. This is the best way I found to program over the years. Remove the thermostat from its base plate. Be careful pulling on it. They don't all come off the same way and we don't want to break it. Before starting the programming process, it's best to erase whatever may be in your thermostat already. 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 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. Here are some common terms used in programming a thermostat. If the names I am using for these procedures is different in your thermostat, change them when writing this all down. One "SCHEDULE" covers a 24 hour block of time. Each block of time from a start time to a stop time is a "PERIOD" in the "SCHEDULE". Again, these are the most common terms and may very in your thermostat. Here is an example of how to program one complete "SCHEDULE" ----- Get a large piece of paper and write down EXACTLY what you want your thermostat to do in ONE, 24 hour day. Here is an example of one "SCHEDULE" having 4 time "PERIODS". > ----- 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 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 out 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. That will put your 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. When you have gone all the way through, and have all the functions set where you want them, 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 "PERIOD" of each "SCHEDULE". That can keep your system running all the time or maybe even not 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. Write it down before starting and be extra careful of overlapping in the time "PERIODS" and you should be OK. Good Luck, and let me know if you need more help. Roger

Feb 05, 2014 | Honeywell prgrammable thermostat RTH2300B

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 | Thermostats

1 Answer

How to end programmed heat settings on thermostat


Without knowing your model #, you can remove the batteries which will reset the clock and the programmed settings. You should be able to set the temp where you want and hit the HOLD button and it should keep it at that temperature until you hit hold again.

Dec 03, 2013 | Thermostats

1 Answer

My rth230b temperature up and down control buttons are now not operable, ie they do not move any function up or down. whether it is a clock reset, or changing the temperature.


Verify your battery is good. Make sure it is in manual and not program by using the mode select button. Verify its set to heat. The first push will show the set temp. Push twice or more to change the temp. With that all said if it is still locked out you might have a short. If its been less than a year you can call the support number on your installer sheet and check for warranty info. I didn't see one in the instructions but to be safe make sure there is not a lock out feature too.

Feb 26, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

Ac unit continues to run for as long as up to 45 minutes after it reaches set point. why? thermostat functions properly periodicaly. thermostat is about 15 months old. was installed at same as new heat...


this can be caused by several issues (1) Configuration program, this is not the program that you the end user set up for time of day programing. Nor set point. but how the T-stat is set up to operate for your particular system, A dead band change my be necessary.in most programable T-stats the system must get temp 1 degree below set point before the system will shut down (2) A relay can be sticking in the condenser unit keeping the compressor on when there is not a call for cooling. for this a good working knoledge of electricity is a must although the t-stat opeates on 24 volts there is high voltage in close proxcimity of control relays ranging from 120 too 240 volts (3) dust on the temp sensor can also be an issue dust act as an insulator not allowing the sensor too sense the Temp properly. (4) or that T-stat can and possibly has failed Electronic T-stat are suseptable too power surges although this is not a frequent occurance it is possible. I would reccomend having your local HVAC contractor check into this. depending on you Mechanical skill

Sep 16, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Backup for control in powercuts not working have to reset every time


Most Honeywell Thermostats have battery back up to maintian program during power outages, so replace the batteries.
Some thermostats have a button type battery hidden just behind the front cover, you have to take the whole thing apart to get to it, these usually last a long time, unless the thermostat was installed and then removed and sat without power hooked to it,
The final type uses a capacitor to store power, it will usually hold program, for 7 days with no power, if the capacitor is bad, it is time to replace the whole thing.
Hope this helps, good luck.
Paul

Mar 22, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Blinking symbol


Look for a reset selection on the thermostat. The Filter warning is probably programmed to come up on 90 day intervals.

Oct 20, 2008 | Honeywell Programmable Thermostat Heater

5 Answers

Honeywell thermostat RTH230B


Sound like you need new one... take a look on amazon ecobee3 Smarter Wi Fi Thermostat Remote Sensor. It's not worth repairing it..

Jan 06, 2008 | Honeywell Programmable Thermostat Heater

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