What action should be taken when checking seals in an RV?

When checking seals in an RV, it's essential to observe that they are visible. This visibility indicates that the seals are properly installed and have not been dislodged or damaged. Well-maintained seals should be evident and intact, ensuring that they perform their function of preventing leaks and protecting the interior of the RV from moisture and dirt.

Regarding the other options, while it's important to replace damaged seals and sometimes apply lubricant for maintenance, these actions should be based on the condition of the seals as observed. If the seals are not visible or show signs of wear, it could indicate a need for replacement or lubricant application. However, the primary step in this process is to first ensure that seals are in place and clearly visible, which is fundamental to the RV's integrity and functionality.