I just bought this LG washer, and the first three loads i did were fine. Now, the past two loads have quit in the middle of the wash cycle. The machine gives a continuous ding-dong doorbell-like alarm and displays three blinking dashes on the display. It keeps doing this for about 15 minutes until it must time itself out, at which point it shuts down and you can try again. Since its not giving an actual error code, its difficult to ascertain what the actual problem is. Any suggestions?