*Onsite service is decided by technician and cause of concern; could require purchaser use of inside of system and multiple or prolonged periods. If difficulty is covered by warranty and not solved remotely, technician or element will be dispatched, normally within 1-2 small business days next completion of remote prognosis. https://sites.google.com/view/dienphucthinh/oc-siet-cap-chong-chay-no-dien-phuc-thinh