So Far no Issues. They work great ! I bought  a total of 3 of these inverter A/C's.  2-10k btu and 1-12K btu to keep all 3 of my bedrooms cool. What really impressed me the most is how quiet they perform. they are by far the quietest i've ever owned. I sleep well at night without being woken up when a/c cycles. WiFi is also a great feature.