Our dishwasher worked fine yesterday and this evening when I went to start it there was a little snowflake icon blinking on it. I looked it up and some people said it had to do with the rinse aid. I checked and the rinse aid wasn't empty but I put some more in anyway and the problem persists. The snowflake icon will blink for a few minutes, then the whole thing shuts off. Any help would be great. Thanks.