Be careful, DO NOT LEAVE THEM ALONE on your property !!!!I have an AHS warranty, the second time I have a problem with my pool equipment, and my warranty company is sending the same contractors a second time. SECOND time I have a problem with this terrible company with the same guy ... they destroyed my pool equipment so I had some extra work ....I guess ...Before they came, our equipment was working (not good enough, but it worked) everything stopped working when they left. ...