Roborock Robot Vacuum Error Code 27: How to Fix It

Q: What does Roborock Error Code 27 mean?

Error Code 27 on Roborock robot vacuums means the robot is detecting a stuck or persistent Virtual Wall signal. This causes the robot to think it is continuously being blocked by a barrier, preventing it from navigating or completing a cleaning cycle. The most common causes are a faulty or low-battery Virtual Wall accessory, dirty infrared sensors, or an incorrectly configured virtual wall in the app map.

Q: Can I use my Roborock without Virtual Wall accessories?

Yes. If you do not own any physical Virtual Wall accessories, you can still define restricted zones and no-go areas entirely through the Roborock app using digital virtual walls and no-go zone lines drawn on your saved map. Physical Virtual Wall units are optional add-on accessories and are not required for the robot to function.

Q: How often should I replace the batteries in my Roborock Virtual Wall?

Roborock recommends replacing the AA batteries in your Virtual Wall accessories approximately every 3 to 6 months under regular use. If the indicator light on the Virtual Wall unit flashes rapidly or the unit frequently loses connection, this is a sign the batteries need replacing. Using quality alkaline batteries will give you the best performance and lifespan.

Q: Will a factory reset fix Roborock Error 27?

A factory reset can fix Error 27 if the problem is caused by corrupted map data, a software glitch, or a misconfigured virtual wall setting stored in the robot's memory. However, if the error is caused by a physically defective Virtual Wall accessory or a damaged sensor on the robot itself, a factory reset alone will not resolve it. Always try the simpler steps first — cleaning sensors, replacing batteries, and removing Virtual Walls — before resorting to a factory reset.

Q: Why does my Roborock keep getting Error 27 even without any Virtual Walls nearby?

If you receive Error 27 without any physical Virtual Wall units present, the most likely causes are dirty or obstructed infrared sensors on the robot, a digital virtual wall or no-go zone incorrectly placed on the app map, interference from other infrared-emitting devices such as some TV remotes or security systems, or a firmware bug. Clean the sensors thoroughly, audit your in-app map for misplaced virtual walls, and update the robot's firmware to resolve this.

Abstract

Roborock Error Code 27 indicates that the robot vacuum is receiving a persistent or 'stuck' signal from a Virtual Wall barrier, causing it to believe it is perpetually blocked and preventing normal navigation. This typically happens when a Virtual Wall accessory is faulty, improperly placed, has dying batteries, or when the robot's infrared sensors are dirty or obstructed. Resolving this error usually requires inspecting your Virtual Wall accessories, cleaning the robot's sensors, and resetting related settings in the Roborock app.