Push start and water starts pouring into washer. It will stop suddenly and the green indicator light goes off. You can keep pushing start, and it may work after several tries. Seems to happen more on warm/regular setting. Yesterday it stopped during the wash cycle and would not work in that mode at all. Had to do quick rinse and spin which worked fine. It worked today on cold/easy care cycle. Has been doing this on and off for a few weeks but is getting worse. What do I need to check first?