my indesit washer dryer WIDL 126S doesnt dry ?

when i put my indesit washer dryer on the dry programme it does not dry fully and sometimes my washing comes out wetter than it went in. Friends have said i need to clear the dryer filter. i cannot find it - there is nothing on the back. it does have a kick plate at the front which i know houses the pump - is the pump and filter the same thing???