Responded to furnace issues. Customer stated filter only lasted about 3 weeks before furnace overheats. Found multiple closed registers on every floor of home. Opened all registers for maximum airflow. Filter is white and full of while particle matter typically associated with isolated room humidifiers. Customer uses humidifiers upstairs with baby advised to be sure to use distilled water specifically cannot check at this time as baby is in room being attended to. Customer chose to sign up for maintenance customer requested we start with ac check. Cycled furnace. Found steady running state of 32 degree deltat. Pushing 108 degree supply air.