RESSAC a/c technician arrived at a Thousand Oaks, CA, home goods store to investigate a water leak. Pinpointed the issue, condensate drain was plugged with debris. Cleaned and blew out line to resolve water leak. While onsite noted the #8 Trane air conditioner was making a loud humming noise. Found the blower motor failing, also will need to replace bearings and pulley. Will quote additional repairs to the customer.