bwm129 led lights keep flashin?

i have a hotpoint bwm129 the led lights were flashing so i checked fluff filter at front which did have some objects in it, when i replaced it about 3 secs in it started to flash again, after chgecking hoses for blockages i got advised to change filter pump, which i have, but the same thing happens... and ideas anyone as i think something else may of been the problem in the first place.....