If it's any consolation, our machine (exactly the same model) has the same fault. Machine about seven years old. I suspect that the heaters (if there are more than one) aren't working properly as the window seems to struggle to get warm to the touch, even when 60 degree cycle is running. So the machine is waiting for heat OK signal before proceeding with the rinse & spin but never getting it. So I'm going to run a meter over the heater terminals to look for open circuits. If there aren't any problem can only be with controller, in which case I'll cut my losses and go for a new machine. I fancy one of these new ones with a brushless motor, should be nice and quiet compared with this noisy beast!
Nigel, April 2012