My Hotpoint WMF540G washing machine does this, generally a few minutes from the end of a wash cycle, when it then constantly flashes "door" and beeps. The only way I am able to resolve this is to switch of the mains power for about 1min, switch the machine back on and then press the start/pause button, when it then continues to the end of the cycle. It doesn’t happen every wash and I have no idea what is causing the error
Andy
March 2010