The first place to start would be with the fact fact that your tech was here for 50 minutes and charged me for 2 hours. Are you kidding me. Then to top things off he couldn"t even fill the unit with refrigerant so it would cool properly. Needless to say the next day i had to call out another A/C company to do the jod correctly so i could have A/C in my showroom. Very unprofesional!!!