How to tell if a CT filter is not working correctly or wearing out?
Turn your extractor upside down then gently remove the filter and see if there is any dust sitting on the housing behind the filter.
If the filter is due for a replacement, fit the appropriate new filter into the extractor and ensure the AutoClean extractors install the AC type filter.
If the filter is due for a replacement, fit the appropriate new filter into the extractor and ensure the AutoClean extractors install the AC type filter.