I've a front-loading Constructa washing machine. Its model number is CWF14W42IL. It keeps giving me an "E18" error message. I can't find my manual, nor an online manual for this model, nor online information on this Constructa error code (though I see meanings for the code when it's issued by other manufacturers' machines — various meanings, depending on the manufacturer). Can anyone tell me what this error code means for my machine, please?