The third contractor was the charm. I had an AC that was blowing warm air and the first contractor estimated a complete replacement at a cost of $5,000. The second contractor showed up without a ladder and refused to look at the unit because it was a rooftop unit. Finally, Tobin H&C was scheduled and the techs troubleshot the unit and determined in 20 minutes that the thermostat was faulty and saved me $4,750. I can’t say enough about this company from the admin assistant to the techs…the customer servicer, professionalism, skills, and price was top notch. I would definitely recommend them and use them again.