Coolray installed two complete systems in my home ...

Coolray installed two complete systems in my home a few years back. One of the systems was a multi-zone that provided service to the middle and lower levels of my home. Recently I was having a problem with my lower level over cooling and Coolray sent a tech out to diagnose an ongoing problem. It turned out that one of the vents was wired to the wrong zone and was the cause. Coolray repaired the problem at no charge even though the system was out of warranty. Pretty amazing stuff nowadays! They do stand behind their work and have some great employees.