Pools and Spas POSEIDON, to know everything about spa closing!
The importance of removing spa pumps when closing the spa
When you are closing your spa, it is not necessary to store the spa pumps if they were purged and the spa panels are well isolated. However, it can be better to store the spa pumps in a dry room. They won't get rusty by doing so.
In sum, if there is some water in the pump, they can freeze and be damaged. It is also important to cover and / or isolate them.