If your indoor or outdoor thermometer isn’t working, there are a few things you can do to try and fix the problem. First, check to see if the thermometer is plugged in and working. If it’s not, try replacing the battery. If that doesn’t work, you can reset the thermometer by following these steps:

  1. Remove the cover from the thermometer.
  2. Locate and press in on the reset button located on top of the unit. The button will light up when pressed.
  3. Replace the cover and wait 10 seconds for the thermometer to restart. ..