How to Adjust the Time on a Programmable Thermostat

Quck answer

To change the time on a programmable thermostat, follow these steps:

1. Locate the “Set” or “Menu” button on your thermostat. Press it to enter the settings menu.

2. Look for the option to adjust the time. This may be labeled as “Time,” “Clock,” or something similar.

3. Use the up and down arrows or the “+” and “-” buttons to change the hours and minutes.

4. If your thermostat has an AM/PM setting, make sure to select the correct one.

5. Once you have set the desired time, press “Save” or “Done” to confirm the changes.

6. Your thermostat should now display the updated time.

Remember to adjust the time as needed to account for daylight saving time or any other time changes.


A programmable thermostat allows you to set specific times for your heating or cooling system to turn on and reach your desired temperature. Some models even allow you to program up to four different time periods throughout the day. These can be set for when you wake up, leave for work or school, come back home in the evening, and go to bed.

In order for these features to work accurately, the thermostat needs to know the current time. Wi-Fi and smart thermostats automatically connect to the internet to obtain the correct time. However, for non-Wi-Fi digital thermostats, the process of setting the time may vary depending on the model. Nonetheless, most manufacturers follow a similar procedure.

How to Locate the Time-Setting Procedure

The owner’s manual or quick start-up guide that comes with your digital thermostat provides all the necessary programming instructions. If you have misplaced these documents, don’t worry. You can usually find a copy online on the manufacturer’s website. Simply search for the make and model of your thermostat along with the keyword “manual.” Some manufacturers even print the instructions on the inside cover of the thermostat, so be sure to check there first.

How to Adjust the Time

Although this procedure is specifically for Honeywell thermostats, it may work on other models as well. You may need to adjust the time if your thermostat is new or if the batteries have died. Before starting, make sure to replace the batteries with fresh ones.

  1. Toggle the system setting switch to the middle position to turn it OFF.
  2. Press the SET button. This will cause the clock setting to flash.
  3. Use the “up” arrow key to move the time forward and the “down” arrow key to move it backward. Keep pressing the arrow until the clock displays the correct time.
  4. Press the SET button again to set the time. The day of the week will then start flashing below the time. Use the button to scroll to the correct day and press SET once more.

How to Program Time and Temperature

Once you have adjusted the time and day, you can proceed to program the thermostat for up to four different temperature settings at different times throughout the day. These time periods are labeled as WAKE, LEAVE, RETURN, and SLEEP.

After pressing the SET button to set the day, the first programmable time period, WAKE, will start flashing. Toggle the system switch from OFF to either HEAT or COOL, depending on your preference, and then press SET again. The time will flash, so use the arrow keys to select your desired time, press SET again, and the temperature will start flashing. Choose the desired temperature for that time and press SET once more to move on to the LEAVE period. Repeat this process for the RETURN and SLEEP periods, setting the desired time and temperature for each.

There are thermostats that have the capability to be programmed specifically for the weekend. In the event that you possess one of these thermostats, the words “SATURDAY” and “SUNDAY” will blink at the upper part of the screen once you have finished configuring the schedule for each day. Once you have successfully set the daily schedule for all the days, the word “END” will appear on the screen, indicating that the programming process has been finalized.

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