Re: Smeg DWF64 No error codes
All 4 lights coming on is not a recognised fault code so points to the PCB being corrupted.
You may find that the mains suppressor has failed, or, as you have mentioned, the dispenser solenoid is playing up. Dampness and dodgy wiring can affect it.
The kicker is that you need to know that the dispenser or mains suppressor works correctly before addressing the PCB, so it can get rather pricey…….
Pro help? Click the link below for a UKW engineer in your area.
Power off if you intend to investigate this problem yourself.
Penguin45.