I had a Shop vac brand vac. While using it Friday it was behind me. All of a sudden it quitI looked behind me to see all the smoke in it was escaping.It burned up and kicked out the braker Now we all know it has a filter in the canister. But what they don't tell us is there are other foam filters inside the housing to filter the air cooling the motor. It was plugged up and the motor burned up. It would be a good idea to periodically flip the flip the top over remove the screws and clean those filters. I went to sears and bought a new Craftsmen 16 gallon shop vac. I believe the Craftsmen was made by Shop vac. The old one was 20+ years old.