F 7 appeared on screen and it is beeping and won't turn off

Try this first! The control panel has a flat ribbon cable that plugs into the relay module. The ribbon is actually two ribbons pressed together. The plastic insulation has a defect, and the leads between the two ribbons cross. You can seperate them easily by lifting them apart. Place a piece of paper between them to act as an insulator. This should solve your problem. If that does not work, repalce the defective parts yourself. You can do it for about 30% of what a repair company would charge. it's either got to be 1. A fuse 2. Control panel 3. Relay panel. Good luck!!!