Re: Hotpoint SDW60 lights 1 (Prewash) and 6 (drying) flashin
1 + 6 does not appear to be a recognised error code.
Common faults on these machines are water ingress into base which can be caused by using 3 in 1 or 4 in 1 tablets, as well as being caused by internal leaks. Drag the machine out, unplug and tilt it to one side after you have placed a couple of towels on the floor. If you get water leaking out then your base was flooded. If the machine then works but the fault returns then you need to find the source of the leak.
Jim.