Rheem water heaters are constructed to provide many years of operation. With most models your first step should be to press the TCO thermal reset button which is located on the front of the combustion door. Hard water (leading to mineral build-up), corrosion, excessive demand, and improper installation can all cause problems with on-demand water heaters. Tankless Water Heater Troubleshooting Tips . Changes in water quality Check online or call your local water plant to see if there have been any recent changes in water quality. So is the case with Rheem tankless water heaters. Most of the problems with a Rheem gas water heater will be related to the FVIR lockout. in Water Heaters Even the best tankless water heaters sooner or later may stop working or be affected by other kinds of problems. Even indoor units are prone to freezing, especially if they are located in a basement or a garage. The small tank water heater provides you with hot water while your tankless unit’s heat exchanger warms up. If you find yourself faced with any of these tankless water heater problems, continue reading for troubleshooting tips. They come in a wide range of sizes and capacities, are designed to deliver hot water quickly and are very energy efficient. Here are the best ways to address these issues. Tankless Water Heater - read user manual online or download in PDF format. Tankless. Rheem is highly recognized for providing top quality residential and commercial water heaters. Mineral Build-Up. Common problems with a Rheem water heater include a lack of hot water and incorrect water temperature. The next step should be to clean the intake of the water heater. Fixing tankless water heater problems No hot water. RTG2-42 water heater pdf manual download. The purpose of this manual is twofold: it serves as a training tool as well as a troubleshooting manual for qualified installers and service technicians. Problems and solutions vary based on the type of water heater. A high-quality tankless water heater should last 20 years, but it must be properly maintained. Technical Support (800)-432-8373 www.rheem.com Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the Air-Conditioning, Heating, & Refrigeration Institute. Make sure that the shut-off valve, is not closed. No hot water is one of the most common problems in water heating systems. Pages in total: 36. The first things you should check are the correct supply of electricity, water, and gas to the water heater. 1. 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