iRobot defines Roomba Error 26 as insufficient airflow. The official sequence starts with the bin filter: remove the bin, empty it, remove the filter and tap debris into a waste container. The filter must not be washed or exposed to liquid. The bin itself may be rinsed by hand with warm water, never in a dishwasher, and must be completely dry before the dry filter is refitted. If the error remains, reboot with the duration specified for the series—nine seconds on supported j Series and Combo 10 Max, twenty seconds on i Series. A returning Error 26 after a clean or replacement filter and reboot indicates that the cleaning-head module or a non-modular robot requires support rather than deeper unverified disassembly.
Models covered
Safety first
- Keep the filter and robot body dry, never dishwasher-clean the bin, remove no fixed covers and do not run the robot until the rinsed bin is completely dry.
What the symptom may indicate
Checks in the right order
- Remove and empty the bin
Pause the robot on a stable dry surface, remove the bin using its release and empty loose debris without opening the robot body.
- Tap-clean or replace the filter
Remove the filter by its edge and tap it against the waste container. Do not wash it. Replace a damaged, wet or persistently clogged filter with the correct model part.
- Rinse only the bin and dry fully
If needed, rinse the empty bin by hand with warm water—never in a dishwasher. Let every surface dry completely before reinstalling the dry filter and bin.
- Use the correct reboot once
After refitting, hold CLEAN for nine seconds on the specified j Series and Combo 10 Max, or twenty seconds on i Series. Let the reboot finish, then run one short test.
Stop and get qualified help when
- Stop and contact iRobot if Error 26 returns after the correct filter and one reboot, the vacuum motor sounds abnormal, liquid entered the robot, the filter is unavailable or the serial/model indicates a non-modular cleaning head.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose the least costly safe next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 safe checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Stop and get qualified help when : 1
Compare replacement appliances on AmazonPaid Amazon search. Results are suggestions, not a diagnosis or a recommendation to discard the appliance.Sources used
- iRobot — iRobot defines Error 26 as insufficient airflow, instructs owners to clean or replace the dry bin filter, hand-rinse and fully dry the bin, reboot by series and escalate a persistent fault.
Last checked: 29 August 2026