Made call for cooling upon arrival. Unit cycled on without failure unit ran with 23 degree temperature drop. Unit is a 2020 comfortmaker system. Customer stated independent contractor installed unit… previously had similar situations go bad for him. Stated wife complained of rattle noise at ac unit. Wanted to get it checked out. During run time noises were common ac noises/ vibration unit was slightly low in front offered to chock up for customer to level unit. Customer wasn’t interested at this time. Unit looks to be a good install at this time. No concerns at this time unit already has hard start and surge protection installed