Performed furnace maintenance on 2011 two system carrier heater. Upon arrival wife was home and husband is out running errands. Perform safety inspection and during the maintenance I did notice a point of concern that can lead to failure in the future on the downstairs system. 1. Indoor Blower motor Has lost a significant amount of oil from a bearing and can lead to a locking up or overheating very soon. This component is used for AC and heating which means that the motor is used to year-round. 2. Both flame sensors have oxidization although were cleaned at this time. 3. Both drainage systems coming off of the evaporator coil’s were not equipped with flood protection. 4. Both systems are not equipped with surge protection At this time both systems are operational and will be emailing over recommendations to John so that he may review them at this time informed his wife about findings and will be following up soon. Both systems are fully operational upon departure