When lights are flashing count the number of beeps. If lights flash rapidly & 15 beeps then it thinks the tub is out of balance. If lights flash slowly & 4 beeps then it thinks lid is open. May be out of balance switch or lid switch is faulty & will have to be replaced.
Mk
January 2011
I can answer this question...
Simpson eziset 450 lights flashing on cold warm and hot?