If you have a digital controller, it is designed to flash "FF" on the display to notify you that a problem may have occurred. Gradient controllers and warming throw controllers use a blinking indicator light for this purpose. Follow the instructions on the flag tag to reset the control or follow these steps: First, unplug the system from wall outlet. Then check that the controller is well connected to the module. Plug the power cord into the wall outlet. Set the controller to "on". If the system still does not operate, disconnect the power cord and contact Sunbeam® Customer Service.