I bought a new unit for my condo over a year ago. On Memorial Day, I noticed it was not getting cool as it had been. I called Coolray that night. They offered to send someone that night but I decided to wait until the next day. The tech came out, ran a couple of tests, and figured out that one of the connectors had a leak. He replaced the part immediately and now it's running like new again. Coolray is a model for customer service.