We needed to get our furnace inspected as it was not done since we moved in and decided to call Coretemp after reading plenty of good reviews. The gentleman came over as promised on time and was very knowledgeable. He explained that there was some miswiring done that was causing our furnace to come on when our A/C was on, wasting energy. He quickly fixed the wiring and fully inspected everything with us present. Great job and great price! Keep up the good work Coretemp!