MaFrieE2 years ago000Hello all. Is it possible to display how long the air filter has been in operation in total? LGShow in original language (German)Anonymous2 years ago000No The running time of the current filter is not displayed. The unit signals when the filter is to be changed. Here is more information https://www.philips.ch/c-p.... - My little-used unit is for sale.Show in original language (German)CommentWach182 years ago000No, unfortunately you can't.Show in original language (German)Commentralfdoller2 years ago000I'm just checking to see if I need to change it.Show in original language (German)Comment