The appliance makes too much noise.
The dust bin is full of dust.
Empty the dust bin and clean the pre-filter and motor protection filter at the rear of the dust bin.
The hose sounds as if air cannot get through it.
The nozzle is blocked.
Clean the nozzle.
The extension pipe is blocked.
Remove the foreign object stuck in the extension pipe using a long stick.
The hose is blocked.
Block and unblock the hose entry with your palm several times. If the same problem persists, contact an LG Electronics Service Centre.