how to fix hotpoint fdw60?

the eco light flashes, i have turned it all of at the mains and tryed again it runs a programme for about 15-20 secs then stops and eco light flashes again but there is still a sound like the pump workin i am guessing this is what the noise is. i did have 4 powercuts during the day time and when i returned to my machine after turning it on i found water all over the floor it was still running at this point so i stopped it and cleaned up the water but machine has'nt worked since. i also found later that the kitchen sink was slightly blocked. i have cleaned everything but still cant find the fault please help.