Do your appliances have many features, but you're not sure what they all do? Owners' manuals for major appliances are filled with valuable information for day-to-day operation and preventive maintenance. They contain troubleshooting tips, too. But what if you've lost your operating manual or never got one because you bought used? Call the manufacturer, and customer service will help find what you need, either for a small charge (it's certainly worth it) or for free. Some companies have them on their Web sites, too. For more tips, visit our Web site at onthehouse.com. And that's the On The House tip for today.