I am having a similar problem with one of these machines except that it runs for 2 or 3 minutes before cutting out. If you then press the start button the machine runs for as long as you hold the button but the relay does not switch. If you leave it for a little while and then try again the relay switches and latches again for 2 or 3 minutes before dropping out. I did suspect this relay before reading the other post on the subject. Have any of you had similar experiences to this and do you feel that the relay itself is the culprit.