The mini-split I bought has been installed by an HVAC professional. This is the same person that installed the other 7 mini-splits that I own. This new one did not power on after installation and has never powered on even after a second HVAC technician checked it. I called the Pioneer store and waited on hold for several minutes before being disconnected. I called a second time and again had to wait an hour on hold to talk to one of their technicians only to be told that he could not help me unless my technician was there. I had my technician call a couple of days later. He had to wait a long time on hold but was finally able to speak with their technician. Pioneer had my technician check connections, breaker, and take pictures and send those so they could be reviewed. He told my guy that he would have another person review everything and then call back to let us know how to fix the problem. Pioneer's technician Never called back. I called again, got a manager who said he would check on the problem and call me back before the end of the day. It has been a week and no one has called back. I called again yesterday was transferred 3 times before being hung up on. I spent over $800 to get this thing. I should have gone to Lowes and bought a window unit.