An arrangement for mounting a motor and fan unit to a support chassis within a vacuum cleaner housing includes a support structure defining an opening for receiving a first mounting portion on a back end of the motor and fan unit, a support member having a recessed portion for receiving a second mounting portion on a front end of the motor and fan unit and a flexible locking tab having an opening and being movable between engaging and disengaging positions relative to the motor and fan unit for receiving in the opening of the locking tab the second mounting portion on the front end of the motor and fan unit when the locking tab is in the engaging position. The mounting arrangement also includes a retaining structure which is movable between assembled and disassembled condition relative to the locking tab. The retaining structure includes a bracket which faces an outside face of the locking tab so as to block the movement of the locking tab from the engaging to the disengaging position when the retaining structure is in the assembled condition.