There could be several reasons why your Roomba gets stuck under the couch:
Low clearance height: Roomba models have varying heights, and some older or less advanced models may not have enough clearance to pass under low-profile furniture like couches. If the couch has a low clearance from the floor, the Roomba might get stuck when attempting to go under it.
Obstacles or clutter: If there are objects or clutter around or under the couch, such as loose cables, toys, or other debris, the Roomba may encounter obstacles that prevent it from navigating properly.
Loose fabric or hanging edges: If the couch has loose fabric, fringes, or hanging edges, they might get tangled with the Roomba's brushes or wheels, causing it to get stuck.
Complex furniture design: Some couches have intricate designs or features, like low-hanging sides or deep crevices, which can confuse the Roomba's sensors and cause it to get trapped.
Sensor issues: Roombas use various sensors to navigate and avoid obstacles. If these sensors are dirty, blocked, or malfunctioning, the Roomba may not be able to detect the couch or navigate around it effectively.
Software or mapping limitations: Older Roomba models may have limited mapping capabilities, leading to less efficient navigation and an increased likelihood of getting stuck under furniture.
Battery or power issues: If the Roomba's battery is running low or there are issues with the power supply, it might not have enough energy to navigate out from under the couch after getting stuck.
To prevent your Roomba from getting stuck under the couch, you can try the following:
Raise the couch: If possible, raise the couch slightly by using risers or other furniture lifting tools to create more clearance.
Clear the area: Make sure the area around the couch is free from clutter or obstacles that might obstruct the Roomba's path.
Tie up loose fabric: If your couch has loose fabric or fringes, try securing them to prevent entanglement.
Check and clean sensors: Regularly clean the Roomba's sensors and ensure they are free from dust and debris.
Update the software: If your Roomba model allows for software updates, ensure it's up to date to benefit from any improvements in navigation algorithms.
Consider a different model: If your Roomba model consistently struggles with getting stuck, you might want to consider upgrading to a newer model with improved navigation capabilities.
Always refer to your Roomba's user manual or the manufacturer's website for specific guidance and troubleshooting tips tailored to your Roomba model.