T.O. ADC CAME OUT FOR AN ESTIMATE ON AIR DUCT CLEANING. THERE WAS A UV BUYBACK. EARNED SERVICE AGREEMENT. SYSTEM WAS INSTALLED CORRECTLY AND MADE SURE WORK AREA WAS LEFT CLEAN WHEN JOB WAS FINISHED. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, AND ELECTRICAL CONNECTIONS. EVERYTHING IS RUNNING GOOD.