The central vacuum cleaner does not stop – what could be wrong?

If the central vacuum cleaner starts by itself and does not stop, the most common cause is a fault in the low-voltage control system. Start by disconnecting the low-voltage cable at the back of the unit. If the unit stops, there is likely a short circuit in one of the wall inlets or in the low-voltage wiring. If the unit does not stop when the low-voltage cable is disconnected, the issue may be related to the quick connector on the unit or the control board inside the vacuum cleaner. This troubleshooting applies only to CV and older models. CVR models require different diagnostic procedures.