Technician was courteous and professional. He called to give 30-minute advance notice of arrival which in turn was within the 4-hour window of time scheduled for this system check/tune-up of our 6-year old Carrier two-zone HVAC system.
He explained what he would do, how long it would take and what the results were (all systems were operating to specifications).
He also reviewed routine maintenance (filter changes) required by owners before completing the call.
Carrier systems are excellent for residential systems. Our 30-year old home is enjoying a comfortable year-round climate at affordable costs.