You will also want to make sure the filter isn't clogged up. Most overheating is going to be an airflow issue. You can also look up online how to pull it apart and check components. You may also have a loose power connection somewhere. Make sure the vacuum is unplugged before you mess with it.
Stardew Valley is $15 USD. It's pretty laid back. Easy to set down and pick back up. I like to play it when my head is all over the place and want something soothing.