Question about Honeywell Heat/Cool Thermostat

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I don't know what the hold temp means on my honeywell thermostat

I have lowered the temperature to 24 but it is holding at 30 and I can't get it do cool down.

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1. You didn't indicate what model of thermostat you have.
2. Hold function on a thermostat with scheduling would mean to hold it at the manual setpoint indefinitely, in other words not following the schedule. 3. I assume the temps you're trying to achieve are C If you have a heat-off-cool switch, I assume it is on the cool position. Most of the honneywell thermostats with a digital display, will indicate a little flame icon when the thermostat is calling for heat, and a littel asterik (snowflake) when calling for cooling. If you don't see the asterik, then you may have a thermostat problem. Have you checked to see if your furnace (air handler) is running? Have you checked to see if your condensing unit outside is running? If they are running, then you have a refrigeration issue.

Posted on Jul 07, 2010

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1 Answer

My Honeywell goes to 85 degress when I am trying to lower to 78. Tried hitting run then set temp them hold. Still jumps back to 85 or more. Changed batteries..no help


Run means you are running the program. Hold means you want to hold the set temp and not run the program. Change the temp, press hold. Hold should be displayed on the screen when not running the program.

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Need to change thermostat from Celsius to Fahrenheit


The first link is operators manual.

The second is installation and contains the procedure to set many functions including the display temperature.

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2577ES.pdf

See page 15 function set 14. This sets F or C temperature
https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2578ES.pdf

hope this helps?
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I believe what your experiencing is the 75 degrees is the hold temp position...the display then reverts back to the actual room temperature...it doesn't mean the set temperature changed back to 65 degrees. Try to reprogram the thermostat schedules, and try not to use the hold function...just the temporary hold. (which is bumping the programmed temperature up or down until the next programmed period)

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My Honeywell thermostat won't set the heat above 75 degrees


ok fist thing is to press and hold the middle lower button and the arrow up at the same time and hold until the screen changes to a number. keep hitting next until you see 75 appear then arrow up to the temp you want and press done. That easy!

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Sounds like you have a programable thermostat. the temporary setting is when you change the temp setting to a different temp and it will stay at that setting until the next programed change. The hold setting is to hold the temp setting you have chosen for an indefinate time. It overrides your programed settings.

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We have a honeywell cm921 and we cant set the therm astat to come on in the mornijng and then go off then come on again in the afternoon on timer please can you help


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.

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1 Answer

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Try pressing the hold button till it says permanent hold. Then adjust the temperature to the desired setting. Depending on the model of it, you might have the option of a vacation hold, then you can set the temperature to the desired setting for a specific number of days.

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Cannot set heat setting by using "hold" feature


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Heya this is a manufacturing fault from honeywell them selves when it comes up -24 basically it needs to be replaced there is no way around in if you get in touch with honeywell they are generally good about it also if you provide them with the date code and model code they will be greatfull as it seems they have sent out a "bad batch". you locate this by:

A) Move the slide in to the off position
B) Press and hold i for 5 seconds
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D) Press and hold the i button and the + and ¿ button together
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I hope this helps

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