Comfort master came to my house twice for the same problem and didn't correct it. The third time they promised a free diagnosis and then replaced a warranty part on my air-conditioner on visit number four. Several weeks later i received another bill for the third visit which was supposed to be free. Instead of correcting the issue they hung up on me and turned me into a collection agency. In all i spent thousands extra on heating and cooling costs because they couldn't fix the problem right the first time. Beware of Leslie and get quotes in writing.