If you find that your grill isn't heating properly, chances are the control is on the fritz! The controls should only be used for an hour to an hour and half tops. Extended use at such high temperatures will cause the control to fail. If you are planning on an all day lefse cooking marathon, it's a good idea to have a second control. After an hour, just exchange controls and keep on cooking! (Please be careful and use a hot pad to exchange the controls, that grill is Hot!).