ROOMBA·FAULT ERR 11 WARN

Roomba Error 11 — Insufficient airflow

Q: Roomba Error 11 — Insufficient airflow

Error 11 means the robot detects too little airflow through the vacuum path. On e, i and j series the fan inlet or exhaust is blocked; on s series the vacuum motor itself isn't running. Clear the airway first.

Severity: Warning — robot cleans without suction or stops the job eijs

Last verified: 2026-07-05 Tools: compressed air recommended Time: ~15 min Difficulty: moderate

DIRECT ANSWER

Error 11 means the robot detects too little airflow through the vacuum path. On e, i and j series the fan inlet or exhaust is blocked; on s series the vacuum motor itself isn't running. Clear the airway first.

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COMMON CAUSES · RANKED

Blocked fan inlet or exhaust MOST COMMON

Debris lodged in the scroll housing chokes airflow even with a clean filter.

Filter overdue for replacement

A saturated filter restricts air enough to trip the sensor.

Failing vacuum fan UNCOMMON

When the airway is clear and the error stays, the fan assembly itself is the fault.

HOW TO FIX IT

No battery or electrical work involved in this fix.

Do full bin and filter care

Empty the bin, tap out or replace the filter, and check the bin's airflow port for blockages.

Inspect the fan and scroll

Look into the vacuum inlet and exhaust for wedged debris. Blast both with compressed air.

Reboot and run a short job

Hold CLEAN to reboot, then test. A repeat error with a clear airway means the module needs replacement.

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COMPATIBLE PARTS

As an Amazon Associate, RoboFaults earns from qualifying purchases. Prices are shown on the retailer's site.

High-efficiency filter, 3-pack — e, i & j series

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iRobot recommends replacing the filter about every 2-3 months; tap it clean weekly, never rinse it.

Check price on Amazon ↗

High-efficiency filter, 3-pack — s series

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The s series filter is wider than the i series part; the two are not interchangeable.

Check price on Amazon ↗

Sources

Verification

OFFICIAL SOURCE

Last verified: 2026-07-05 · How we verify a fault code

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