Technician came to the house and was told by the homeowner that the clean out had been overflowing, and he attempted to snake it himself however he could not clear the line. Technician was given authorization and snake the line clear. However cause of blockage was not pulled back on snake. When attempting to test the line with the toilet, toilet began to back up. Tech augured toilet clear And managed to get line clear and flowing from toilet to septic tank. Customer has been advised that due to the age and condition of the toilet it is recommended it be replaced for it has a poor flush which in turn can affect transportation of waste from toilet to septic tank.