Smeg DWi 64. Home › Forums › General Trade Forum › Smeg DWi 64. This topic has 0 replies, 1 voice, and was last updated 13 years, 5 months ago by atech. Viewing 1 post (of 1 total) Author Posts November 1, 2012 at 6:37 am #72285 atechParticipant I’ve been to look at a Smeg DWi64. It’s showing an E7 fault code.It appeares to be intermittant. I belive this is a metering tank problem. Will the tank need to be replaced? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In