Bought a home (5/2014) with a new ac/heat (11/2010) unit still under warranty and serviced every six months by previous owners. Extended the warranty myself for over $500 for 3 years. Have had issues with the ac unit since then. Was told last year when the unit stopped working, after paying a few hundred dollars for service "not covered by warranty" and multiple following appointments scheduled in which no one showed up for, I would be refunded since I had to hire another company to fix, not only what they couldn't and told me they did, but also to fix more damages they caused while "fixing" my unit. This year, still no refund yet. I had the whole unit reviewed this year by the other company I used last year, and have found out the unit was never installed correctly or up to code, and now have to have major construction done to my house because the original installation wasn't correct.