Upon arrival performed maintenance on package unit. Found system to be dirty in and out of cabinet. Evap coil was dirty, performed a clean and sanitization. Blower wheel was pulled apart and cleaned and sanitized. Adding a phenomenal air purification system. Indoor motor is in very good condtion. Heating cabinet was very dusty inside of burners and components, made sure to clean. Amperages throughout system good. Circuit board has a burnt spot near terminals, did not have surge protector to install. Advised client next visit we can bring one out at a discounted add on price. Filter was washed off. Systemmis in operational mode.\ - Dirty blower wheel / cleaned - dirty evaporator coil / cleaned - added whole home purification system. - dusted off all electrical components System was reset tested and fully functional upon departure.