I was given a faulty dishwasher for free. I thought it may be worth fixing to use. It is an LG, sorry not sure what model. They told me Has been working great, however has recently been playing up. Turns on and off, changes functions, however won’t start when you press play⁄start. Only starts every now and then, sometimes we press start 10 times until starts, sometimes it will start first try, and sometimes it just won't start. Would this be a relatively easy fix?