I have a Beko DL1243 dishwasher. It's been working well until yesterday. As soon as I turn it on; before pressing start to start the washing; it's making a humming noise like the wash has already started and there is a very slight burning smell. I have followed all of the troubleshooting guides by cleaning filters and using the reset button - including turning the dishwasher off at the mains but the problem persists. Any ideas? Thanks