_:n856f4b6f89974add947baf1df77e17aexb12
<http://schema.org/text>
"First, try restarting your air purifier. Next, check the filter lights to make sure your filter does not need to be changed. Also, make sure it’s correctly installed. If this does not work or you know you’ve just installed a new air filter, next try restarting the filter lights by folding down the Filter button for 5 seconds while the unit is running."
<https://airconditionerlab.com/alen-air-purifier-review/>