WE HAVE A HONEYWELL CM921 WIRELESS TEMPERATURE CONTROLLERAND WE SET THE TIMES BETWEEN 6 AM AND 8 AM THEN 4 PM AND 6 PM THEN 8PM AND 9 PM HEATING STAYS ON LONGER THAN TIME SET AND WHEN ON TIMES IT DOES GO OFF THE THERMOSAT SHOWS A FLAME TO INDECATE BURNNER ON BUT NO HEAT ANYONE ANY IDEAS

The Honeywell RTH230B indicates that the system is running the overnight (sleep) program with the 4 inside the house symbol. When the house flashes, the desired temperature has been changed from that programmed temperature (bypass mode). The bypass mode should only run for 2 hours.

The default programming starts the sleep period at 10 P.M. and ends at 6 A.M. On the original program in the thermostat, the temperature target was set to 62 during the heating season and 82 for the air conditioning season.

Since the thermostat was set to bypass, you should check who in your house pressed the Up/Down buttons on the thermostat to change the house temperature. Beyond that, check the start and end times and the programmed temperatures for each scheduled period. Honeywell has the manual for the RTH230B here: https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1800.pdf .

I hope this helps

Cindy Wells
(On my own programmable thermostat, we recently found that one period in the week had been left at the default setting. Thus the thermostat was programmed to maintain 60 degrees when we wanted 65 during the day.)

Try switching the tstat to "man", then change temp. Sounds like a programming issue

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Probably not. There are replacement models available.
The T6661B programmable room thermostat is also known as CM61.
CM61 1 day wireless programmable thermostat is replaced by CM921.
CM61 1 day wired programmable thermostat is replaced by CM901.

I believe it means (I assume winter weather in my example):
1. Wake - This is the time you wake up and you would set the temperature at the time you want it then. So, your temperature throughout the night might have been set at 63, and if your "wake" time on the thermostat is set to 6:00 am and 68 degrees, then your system will automatically adjust the temperature setting to 68 degrees at 6:00 am.
2. Leave - This is the time that you would typically leave your house for work. You probably don't need to heat or cool your house that much during this time especially if no one will be there. So, let's say you leave for work at 8:00 am. You would set this time for 8:00 am and 60 degrees.
3. Return - This is the time you get off work. Let's say you get off at 5:00 pm. You would set this time for 5:00 pm and 65 degrees. Then the system will start warming up at 5:00 pm and will be warmer by the time you get home.
4 - Sleep - This is for when you go to bed. Following the example, let's say that you set your temperature while sleeping to 63 degrees at 10:00 pm. Then, the system adjusts at that time and will adjust again as soon as then next parameter is met, which at this point would be the wake time.

This is usually for a Mon - Fri schedule and then a separate one for the weekend.

Centigrade?

Your CM921 has 6 built in temperature settings based on time of day:

1 - 6:30 AM
2 - 8:00 AM
3 - 12:00 PM
4 - 2:00 PM
5 - 4:00 PM
6 - 10:30 PM

meaning that at 6:30 AM the themostat will change its temperature setting to setting 1, at 8:00 AM it will change the temperature setting to setting 2, and so on. To schedule temperature settings which best fit you, determine which time periods you would like more or less heat.

For instance, to fit what you requested in your question you could program a temperature you would like to maintain in the morning and afternoon times when you would like it to be on, and in the time periods in between set a lower temperature as follows:

1 - 20C
2 - 16C
3 - 16C
4 - 20C
5 - 20C
6 - 16C

With this example your thermostat would turn on at 6:30 AM as long as the temperature was below 20C and maintain that temperature until 8:00 AM. At 8 it would change its setting to 16C allowing temperature to drop from 8 AM to 2 PM to a lower setting to conserve energy until afternoon time when the setting would change back to 20C from 2 PM to 10:30 and then change back to 16C to save energy throughout the night. The actual temperatures would be at your discretion based on your individual comfort level.

Pages 5 and 6 of the following link will guide you in setting each of the 6 temperature settings.

http://www.wolseleysbc.co.uk/_STEPData/Assets/Honeywell%20CM921%20Room%20Thermostat.pdf

I hope this helps. Let me know if you have any additional questions.

One possibilty is the therm has a antisipator setting, meaning Ex; at 7:00 you want 72*f,but the house is 62*f at 6:15 the therm will bring on the heat early so the house will be at 72*f@7:00.There should be a short lag if it is comming on at 4:00 it is something else.

Complicated because I need more info....but in General a Boiler should not be on a Programmable Thermostat as it takes too long to heat etc...do you have Radiators in your house???Or ductwork for heat???It will make a difference...if you put the boiler on a program it may come on anyway as some boilers maintain there own internal temperature regardless of the thermostat.....if you want to run it on a program adjust the temperatures so there is only about a 2 degree swing....70...down to 68....back to 70.....etc...there should also be a switch in the thermostat to set for Boiler...or Electric heat...make sure that switch is on...otherwise its difficult to give you a more conclusive answer

if you have a programable tstat you need to go through the settings for each day and time. usually the buttton will say prgm or program sometimes it will be set try to get into the settings menue and then you can adjust times

Remember the is a time and temperature controller if you want to use as an ON/OFF controller please ensure you OFF times are set to LOW temperatures for example at 8:00am I want the boiler firing to 21°C at 10:00 I want the boiler to go OFF at 5°C so ensure all so called OFF times are set to LOW temperatures.