How to reset Honeywell thermostat rth221b1039?

Use the arrow keys to navigate to the “Reset” menu. Once the menu appears, press down on the up arrow key. Then press the “Reset” button. Both buttons will be depressed. The icon will remain blue until the thermostat resets. Once the reset is complete, the icon will return to its previous color.

How to reset Honeywell mercury thermostat rth?

The most common control board is the rth221b1039. This board is responsible for controlling the 4-stage heat and cooling. If your thermostat has a malfunction, there may be a problem with this board. You will need to replace the rth221b1039 board. We have extra parts, so you don’t need to replace the complete control board. Just replace the board with the new one and you will have a working thermostat.

How to reset

If you are unable to press the “reset” button, you can press the hardware reset button on the back of the thermostat. To do this, press and hold down the two buttons at the same time for about 10 seconds. This will restart the thermostat and set the temperature to a default. If you want to change this, press the “set” button and choose the temperature you want.

How to reset Honeywell thermostat rth?

Now press the reset button on the thermostat and it will restart itself. Connect it to your WiFi and you will see the new temperature displayed on your thermostat. To set the temperature you want, press and hold the Set button for a few seconds until the temperature changes. All the time you will have to press and hold the Set button, don’t release it until you change the temperature.

How to reset Honeywell thermostat rth

To reset the thermostat, press and hold the ‘Off’ button for 5 seconds. Now, click the ‘Reset’ button after the screen locks. You will hear a click sound when the new settings are set.