If your vacuum cleaner is sluggish, excessively noisy or not functioning at all, there are a number of simple checks and repairs you can do yourself before taking it to an authorized repair station.
Be sure to unplug the machine before doing any work on it.
If the motor doesn't run:
Be sure the plug is inserted firmly in the outlet.
Check the wall outlet with a lamp you know is working. If the power is off, replace the fuse or reset the circuit breaker.
On an upright unit, check the fan and remove any obstruction. Lay the vacuum on its side, and remove the bottom plate. On most models, this will expose the fan's blades. On a canister, a filter in the bag compartment usually protects the fan.