We had geothermal installed in our original house by Complete Comfort Heating and Cooling. Since then, we moved to a new place where geothermal was already installed but not working very well. So, I asked Complete Comfort to come out and take a look. They took good care of us in our new place. Complete Comfort obviously knew a lot more about geothermal than the installers did. The service person, Michael, figured out the problem and fixed it for me. Complete Comfort Heating and Cooling was referred to me by my neighbor who works in the industry. We are very happy to use their service and will continue to do so. Absolutely five stars! You bet we would recommend them!