Indesit w93 washing machine fills with water but doesn't start washing

Hi there. I have an old model, the indesit WM12. Never counted the flashing light (yours was 10) but my dial started clicking constantly at the drain part. I called Idesit and they told me it was a blockage in the filter.
The filter they speak of it located, on mine, at the front of the machine at the very bottom on the right. It is a black dial about 3 - 4 inches in diameter. Unscrew that anti-clockwise (a real pain because so much water comes out. My wife and I unscrewed it, filled a baking tray with water, screwed it back up, emptied / substituted tray then same all over again - until empty. Though putting it on drain again and again helped at same time). When I pulled out the filter found a 'colour catcher' sheet in it. We used them first time ever the other day. Removed that, gave filter a wee clean and, hey presto, all is working again. Hope that helps. Jim