Upon arrival spoke with customer who’s informing me that thermostat keeps running even after temperature has been met. Inspected Nest thermostat settings. Customer had fan on / running continuously. Disengage fan settings. Ran and tested heat for both 1st/basement zone and 2nd/3rd floor zone. System is shutting down when temperatures are met. Both zones are normally operating @ this time. Ran and monitored x2 system, system is left operational. It was recommended by previous technician (William Dank) for customer to have duct cleaning and sanitizing done for 2nd floor system. Customer is looking for a follow up from office to schedule duct cleaning and sanitizing. View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-DA6ECE2823F745B0B0C8F28A40B34D48