The drain motor (UCL13N04B1UZ12) controls the drain valve on the new JURA fully automatic coffee machines. If the motor is faulty, the brew unit also stops moving. If your JURA automatic coffee machine shows "Error 8", in addition to the brewing unit, drive or electronics, it can also be related to a faulty drain motor. The JURA automatic coffee machine washes the brewing unit before turning it off. If the coffee machine starts to buzz and does not turn off, then this spare part is defective.