Hotpoint FDW 60 Eco & Prewash flashing?

My Hotpoint FDW 60 won't complete cycles that have a drying phase, the eco & prewash leds's flash. The machine drains ok and the fast and prewash cycles complete ok with no error codes. There is no blockage in the filter & drain hose, I have checked the drain pump and it seems ok. I wonder if anyone can help before I call Hotpoint out?