I had a thermostat go out on me and went down to Home Depot bought a new one and installed it exactly as the instructions said. It started blowing cool air so I left and came back 3 hours later to my house that was 94 degrees! It was hard to breath it was so hot! I was out in touch with Glen and he walked me through installation and was super patient. The wiring was super weird but he had me send pics of it all and he had me try something else with the wiring and now I am sitting in a 72 degree home. They are very knowledgable and helpful and saved me 100 bucks at least! Don't hesitate to hire these guys