iRobot Roomba Error Code 27: How to Fix It

Q: What does Error Code 27 mean on a Roomba?

Error Code 27 on an iRobot Roomba means the front bumper sensor is stuck or is not detecting movement correctly. The Roomba's bumper is designed to compress slightly when it contacts an obstacle and spring back when clear. If dirt, debris, or a mechanical issue prevents this movement, the Roomba reports Error Code 27 and stops to avoid damage.

Q: How do I fix Roomba Error 27 without taking it apart?

In most cases you can fix Roomba Error 27 without disassembly. Power off the Roomba, then use compressed air and a soft brush to clear debris from the bumper gap. Wipe the IR sensors on the bumper face with a microfiber cloth, then tap the bumper firmly against your palm to free any stuck internal debris. Power the Roomba back on and run a test cycle.

Q: Why does my Roomba keep getting Error Code 27?

Recurring Error Code 27 usually means debris keeps re-entering the bumper gap during cleaning cycles (common in homes with heavy pet hair or carpet fluff), a bumper spring is weakening or broken, or the bumper IR sensors are consistently getting dirty. Try cleaning the bumper after every few cleaning cycles as preventive maintenance. If the error keeps coming back despite regular cleaning, the bumper assembly likely needs to be replaced.

Q: Will a factory reset fix Roomba Error Code 27?

A factory reset can fix Error Code 27 if the error is caused by a firmware glitch rather than physical debris or damage. However, if the bumper is physically stuck due to dirt or a broken spring, a reset alone will not solve the problem. Always try the physical cleaning steps first before performing a reset, since a reset erases your saved maps and cleaning preferences.

Q: How much does it cost to fix Roomba Error Code 27?

If the fix only requires cleaning — compressed air, a brush, and isopropyl alcohol — the cost is essentially zero. If the bumper assembly needs to be replaced, generic compatible bumper assemblies typically cost between $15 and $40 depending on your Roomba series. Professional repair or replacement through iRobot Support may cost more, especially outside of warranty. Always check if your Roomba is still under iRobot's one-year limited warranty before paying for repairs.

Abstract

iRobot Roomba Error Code 27 means your robot's front bumper sensor is stuck or not registering movement correctly, preventing the Roomba from navigating safely around your home. This typically happens when dirt, debris, or a physical obstruction keeps the bumper from springing back to its neutral position. In most cases, a thorough cleaning of the bumper and its sensors is all it takes to get your Roomba back on track.