With my kettle on the base securely, I turn it on to heat water. The light on the inside of the kettle comes on as though the water is heating. However, after about 10 seconds or less, the light goes off and I hear the "ding" suggesting that the kettle has turned off. The thing is, the on/off switch has not flipped to the "off" position. Is it still working? What do I need to do or replace to get it back in order again? Help! I love my kettle and depend on it to heat water for tea, soup, etc. and now that it's getting colder I really need it!