Arrived at location on 9/19/22 - Removed top plate and found that drain is clogged. Removed back cover and it was filled to the top with greasy water. Removed water from the unit. Removed drain. Was extremely clogged. Used metal wire through to free open. Rinsed in the sink then reinstalled into unit. Water goes down to pan now with no issues and no more leak. Unit back in service and ready for use.