Clean bristles on roller

WD40

Look to see if the belt broke or belt slip off most of the time is something wrong with the belt. If you change the belt of fix the belt that is the time you clean the brush.

Try twisting the belt in the other direction then slipping it over the silver post. I have made the same mistake, when it's put on backwards it immediately slips off the motor. Good luck, I hope this helps, although I notice you asked the question quite a while ago.

Manuals

Unplug, cut hair on rollers and pull to clean. Remove dust bag and use a bent hanger to pull out the clog from the intake tube, most likely there is paper caught in the hair.

A common problem with roller/beaters is hair caught in the bearings on the ends of the roller. The roller is removable and requires regular cleaning or the belt will be destroyed.

OK- The plate needs brushing with a bristle brush to get the oxidized crystals and grime off it. If you don't, it will not create ozone. I never use water any more, it rusts the plate eventually. Rust also stops the process. I use rubbing alcohol. Cheap and safer than ammonia...MUCH safer. Blow dry. The only bulb is the radio wave ionization indicator bulb, attached to the round antenna-looking thing. You should wipe the ionizers off with alcohol every 6 months too. If they are gunked up they don't work nearly as well. Look up the Living Air Classic manual.

You might be able to fix them.
There a couple of things that can go wrong with these units, dirty plates, bad contacts, and bad reostat.

Dirty plates:

The ozone is generated by the purification plates. They should be cleaned once a month with a solution of one part amonia and one part tap water. Use a soft bristle brush like an old toothbrush and scrub the metal contacts on the plates with the amonia solution. Be sure to do both sides. Allow them to sit with the solution for 10 minutes, then rinse off with tap water and allow it to dry completely.

Bad Contacts:

There is a couple of metal strips that make contact with the purification plate. Check the contact strips and wires for corrosion. The metal strips can also be cleaned with the amonia solution as well.

Bad Reostat:

The reostat is the part that attaches to the control knob that sets the purification levels. Sometimes it can go bad. The easilest way to check them is to use a meter and verify that as the knob is turned that the resistance changes with the position of the knob.

Disconnect the power and give it a good cleaning with a SOFT BRISTLE PAINT BRUSH. Outside is best. Blow it out gently with canned air after you brush the dirt loose.

The blades come out of the top and can be cleaned gently with detergent for dishes and a soft bristled tooth brush.