Instructions
Keep your console in an open, well-vented space. Overheating may be one explanation for red ring errors. If using your Xbox 360 in a gaming cabinet, keep the doors open while the console is turned on, and keep the area around the system free of clutter.
Check your Xbox 360 periodically by simply touching the case, particularly during long gaming or movie-watching sessions. If the console seems hot, turn it off for a few hours.
Check all connections periodically. Test all power cables, as well as the wall outlet. Some red ring errors come from the system not getting the required amount of power.