First, ensure your Airdog is plugged into the power source (wall outlet, etc.). Also, ensure the power cord is not broken/damaged (i.e., your puppy chewing on it, etc.). Next, ensure that the back plastic cover is completely closed and the catalyst filter is fully inserted. Suppose either of these 2 parts is partially inserted. In that case, the power toggle switches connected to them will not allow Airdog to power on. This is a quick and easy check to do. ( For X8 models, check these 2 parts as well as the 3 additional parts that also have toggle switches needing to be fully engaged. Those are the two side covers and the top plastic cover. Make sure all 5 pieces are "snapped shut in place" fully.) If lights are turning on, but the fan is not blowing air, the most likely cause is that it needs a new fan motor replaced. If lights are not turning on, the most likely cause is that it requires a new electronic control board replaced. For either of these reasons, contact your local Airdog Customer Service to get the unit serviced and repaired.  

t is silica which is built up from air pollutants. It's normal to have some white deposits on the wires. You may use a sponge to remove it. Without creating any contact between water and the wire frame.

Notes：
1. Don't tie the wire. 
2.Tighten the wire when winding.
3.The screws at both ends of the wire need moderate strength, and the wire is easy to break if it is too tight.

Replace sensor. Here is the video: https://youtu.be/TTCz7

Check whether the connecting belt of the transfer plate has come off  (The far left connecting belt). Here is the video: https://youtu.be/1n-wzaA