Hold the reset button (if present): Some non-programmable Honeywell Thermostats have a dedicated reset button, usually located near the display or behind a cover panel. If your model has one, hold it down for about 5-10 seconds while the power is off.
Most heating, ventilation and cooling (HVAC) system thermostats have more than just temperature control buttons. They often have a reset button as well.
For Latest Honeywell Scanners:
Use the single bar code 'DEFALT' command to reset the device. Note: This selection erases all settings and resets the scanner to the original factory defaults.
Once the safe door is open, locate and press the small reset button located on the inside edge of the door, the keypad will beep twice and the green LED will light up. 2. Enter a new 3-8 digit Primary user code followed by the # key, the green LED will again light up and the keypad will beep.
Below are the most common causes of blank screens: Tripped circuit breaker. Dead Batteries. Broken Thermostat Screen.
Find the breaker to your HVAC system, flipping it 'off'. Make sure the breaker is flipped all the way 'off,' then wait for 30-seconds. Turn the breaker back 'on. ' Return to the thermostat control panel and flip the thermostat back into the 'on' position.
If your thermostat is set to a temperature regulation mode or has an energy-saving program enabled, it might reset to conserve energy.
A bad thermostat can be detected when your AC or furnace is not turning on, your HVAC systems are not turning off, the thermostat not responding, your HVAC system is short-cycling, the room temperature not matching the temperature displayed on the thermostat, and the programmed setting resetting themselves.
Press and Hold: Using a small object, press and hold the reset button. The time you need to hold it can vary, but generally, 5-10 seconds should suffice. Wait and Observe: After releasing the reset button, wait for the thermostat to reboot. This might take a few minutes.
Restart Your Honeywell Thermostats
It might be helpful to set it to “off,” and then back to “on” again to trigger the restart. Depress and hold the Menu button down for 5 seconds. Count to five to ensure the unit has the proper time to recognize the command. Scroll though the digital menu and select “Reset.”
Troubleshooting a Programmable Honeywell Thermostat
Put in new batteries; Check the circuit breaker; Check the indoor unit to make sure all the panel doors are closed; Make sure the power is connected to the furnace or air conditioning unit by checking the switch near the indoor unit is up.
Using the “hold” function on your system means you can suspend the program if you'll be away from home for a while, such as while you're on vacation. This means you can tell your HVAC to stay put at a specific temperature to keep your pipes from freezing in winter but as warm as you want it to be for comfort.
Access the Menu: Once the thermostat is off, press and hold the center button on the device. This will bring up the main menu. Navigate to Reset Option: Use the arrow buttons to navigate to the “Settings” option, then select “Reset” from the list. Select Factory Reset: You will see a few reset options.
No power: If the thermostat isn't working at all, there could be a power issue. Try checking the circuit breaker box or replacing the batteries. Bad wiring: The thermostat may be unresponsive if the wiring has gone bad. Remove the cover and check inside for loose, detached, or corroded wires.
On average, a thermostat takes around 5 to 10 minutes to reset. However, the exact time may vary depending on the specific model and brand of the thermostat. During the reset process, the thermostat goes through a rebooting sequence, which includes shutting down and restarting.
Due to corrosion or aging, your car's thermostat can get stuck in a closed position. If this happens, the thermostat will not let the coolant reach the radiator, and, as mentioned above, the engine will overheat, causing severe damage.
Battery replacement: If your thermostat uses batteries and they need to be replaced, you might have to do a reset to ensure everything functions properly.
The most common reasons for a blank thermostat screen are dead batteries, a power outage, a tripped circuit breaker, faulty wiring, or a failed thermostat. The screen will be completely dark and unresponsive when there is an issue with power reaching the thermostat.
If you have a touchscreen, select "menu" then "clean screen". The screen will remain locked for 30 seconds. After 30 seconds press "Done" to resume normal operation. This prevents accidentally changing the mode, set-point, etc.