I just got the unit ac-14100h. I hooked everything up read the instructions and waited several hours and powered the unit on. It seemed pretty powerful and cool for about 5 minutes and then it shut off. The light started to blink and the number LED started to blink as well. To make a long story short. There seems to be a problem with the unit. I called customer service and they seemed to know what could be wrong the unit so they said the were going to ship out a new unit for exchange. So far newair customer service is excellent. So iam hoping that the new unit will be good.