I don't know if you have any where you live, but sometimes you can find local appliance repair shops that might sell parts. Even if they don't have a new element hanging around they may have an old usable one to sell you. I used to work at one and we kept ahold of discontinued parts to use for repairs or sale.
Yay keeps a cache of packages to help building go a bit faster. Sometimes it can cause issues if things have changed that the cached build system can't detect. Clean build removes the cached files and re-downloads everything to install. None means don't clean build, all means all listed packages that need upgrading. don't know about installed vs installed I never used those flags. The numbers correspond to the number by the package if you want to only select specific ones.
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.
Yes , and usually has a picture of a pistol pointing at the observer. Frequency of use varies from place to place.
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