Technician performed one full system heating maintenance which includes indoor furnace. Technician checked all electrical components for amp draw, mfd, and all high and low voltage connections. Technician checked blower wheel and exhaust fan. All pressure and safety switches were checked and tested. Filter was changed and dated for home owner. Technician removed and cleaned burner track and sanded ignition stick. Heat exchangers were surveyed and no cracks were found. Over all condition of furnace is in manufacturing specifications and safety codes. Replaced armor flex on entire line set inside.