A customer can find a contractor to repair a Ruud gas furnace by visiting the company's website. In addition to providing online links to local contractors, Ruud has a customer service number to answer any questions about available contractors.
There are also online search engines that can find information about local contractors. These websites are typically free of charge, require no obligation and are easy to use. The search results provide a directory of screened contractors, and most include helpful customer reviews. A customer may also wish to contact the company that installed the furnace. A common practice when installing a furnace is for the company to attach their contact information to the furnace itself, usually with a sticker. If they can't repair it, they can recommend someone who can.