If your Taylor thermometer isn't working, there are a few things you can try to get it up and running again. First, check the batteries. If they're old or low, they may need to be replaced. Next, make sure the thermometer is clean - any dirt or debris on the sensor can interfere with its ability to take accurate readings. Finally, if the ambient temperature is very cold, try moving the thermometer to a warmer location; sometimes extreme cold can cause the sensor to malfunction.