my Google Home mini turns on all the things in the room when I ask you to turn on the lights. The same thing happens whenever i ask it to turn the fan on. Basically when i ask it to turn the light on it turns the fan on too and vice versa.
This is not the experience we want you to have, let me help you. A few things: which Nest speakers are we working with? When did your issue begin? Were there any recent changes made?
It would help a lot if you could do a sequential reboot first:
Once done, see the guide provided above by listairee. You can review the devices in each room and if you can, you can edit them.
Tell me how it goes.