I purchased this dryer about 18 months ago and now the “clean filter” light remains on. I have cleaned the filter etc etc but this makes no difference.
I have serched the WWW and it looks like this has been discussed in some of the trade only pages part of this site.
The fault will likely mean that the element or thermostat are at fault. You will need to contact an expert to check it out for you. A few are listed on this site if you look in “Directories” on the navigation bar.