If it's a Samsung then you got nothing to worry about, it wont last out a presidential term for over half their buyers. You will need to buy a new one before too long. They catch fire more than the rest of the industry also and have above average levels of faulty main boards (behind the section with all the buttons etc). They become this way because they dont seal the module sufficiently and it's particularly problematic if you are using hot water because of any steam and humidity condensating on the warm electronics.
