iRobot Roomba Error Code 33: How to Fix It

Q: Why does my Roomba keep showing Error 33 even after I empty the bin?

The most common cause is a clogged or worn filter that restricts airflow even with an empty bin. Clean the filter by tapping it against a trash can, and if the error persists, replace it with a new one. Also check that the bin sensor contacts inside the robot and on the bin are free of dust, as dirty sensors can falsely report a full bin.

Q: How often should I empty my Roomba bin to prevent Error 33?

iRobot recommends emptying the dustbin after every cleaning run, or more frequently if you have pets or heavy debris. If you have a Roomba with a Clean Base automatic dirt disposal dock, the dock empties the bin automatically, but you should still check and clean the bin and filter at least once a month.

Q: Can I wash my Roomba filter with water?

Only if your specific filter is labeled as washable. Most standard pleated filters included with Roomba models should only be tapped clean — not washed. Washing a non-washable filter will damage it and reduce suction. If your filter is washable, rinse it with cold water only and allow it to air dry for a full 24 hours before reinserting it.

Q: How do I reset Roomba Error 33?

After clearing the clog and cleaning the bin and filter, press and hold the Clean button for about 10 seconds until you hear a tone. This performs a soft reset and clears the error. If the bin is properly cleaned and reinserted, the robot should resume normal operation after the reset.

Q: How long do Roomba filters last before they need replacing?

iRobot recommends replacing Roomba filters every 2 months under average use. If you run your Roomba daily, have pets, or live in a dusty environment, you may need to replace the filter monthly. Signs that a filter needs replacing include persistent low suction, Error 33 appearing even after cleaning, and visible holes or tears in the filter material.

Abstract

Roomba Error Code 33 means your robot vacuum has detected that the dustbin is clogged, full, or airflow is severely restricted. This typically happens when the bin is overdue for emptying, the filter is dirty and blocking airflow, or debris has become lodged in the bin inlet or suction path. The good news is that Error 33 is almost always fixable at home in just a few minutes with no special tools required.