We would strongly discourage inexperienced people from adjusting their hot water thermostat themselves. They relate to the relative temperature of the hot water. It could be caused by the temperature setting of your tankless water heater. Adjusting Your Tankless Water Heater. Emergency Heat, also known as “auxiliary heat”, is the second stage of heat that your thermostat runs on when the temperature is too cold for your heat pump to extract heat from the outside. You can adjust the temperature degree by degree, rather than by a less precise dial control. A good temperature is usually 120°F for most people. So if B is too hot, set it to A; if B is too cool, crank it up to C. Generally, A should be as hot as you need, but habits vary. Setting the hot water temperature lower also means a savings in energy bills for heating the home's water in many cases. Check Temperature Setting. Water Heater Temperature. Water heaters have dial indicators that allow you to control the temperature of the hot water. New water heaters have a temperature dial called “VAC” for vacation setting\. Master Plumber Bryan Graham explains why that happens and how to fix it in this video. Water heaters are set from the factory to heat water to a maximum of 120 degrees Fahrenheit. Bacteria, such as the strains that cause Legionnaire’s Disease, thrive in water with a temperature less than 122 degrees Fahrenheit. Most manufacturers recommend a temperature setting of 120 degrees. what setting should i use? Fuel sources can be propane, natural gast or electricity. These LED controls offer you much more control over temperature than you have with a storage heater. (Yawn.) For homes that use more hot water, set only the top thermostat 5° to 10° degrees higher. Any higher, or lower, could actually be dangerous for you and your family. 17 November 2011 at 10:29PM. The standard temperature for most water heaters is 140 degrees F, but the Department of Energy Link … Water that is set to 160 degrees will give you a lot of hot water. "we have lifestyle LP722 thing in kitchen, im assuming its set from this box?? The most obvious reason the water is too high is that the thermostat is set way above what is comfortable. This is usually set between 90- and 120-degrees Fahrenheit, but this could be too high for some homes. Professionals recommend keeping your water heater set at a temperature between 130 and 140 degrees Fahrenheit. The question I always asked myself when reading about this is why manufacturers have the default setting … Remove the access panel for the upper heating element on the water heater. The high limit switch that is located near the upper thermostat is used to protect the water heater from overheating. That means your heater hot water temperature should be set at or below 120 degrees Fahrenheit. When you’re leaving for vacation, simply turn this dial to VAC\. They tolerate a range of temperatures, although below 20°C and above 50°C they are dormant and above 60°C they will not survive. my water heater's old, if that makes a difference. The Department of Energy recommends having your tank-based hot water heater set to 120 degrees Fahrenheit for most people, but if you’ve never adjusted the temperature on your hot water heater, it’s probably set to 140 degrees, which is the default setting from most manufacturers. It will stop working if the temperature of the water goes above 170 F. You can also reset your settings using this button. Turn power back on to the water heater and enjoy your new water temperature settings. It is not possible to set a water heater thermostat at a given temperature and get a relatively constant temperature of hot water from a water heater. While turning the temperature up higher can result in burns, turning it lower than the recommended setting can also be dangerous. Water temperatures in the range 20°C to 47°C also favour growth, the optimum temperature being 37°C, but it is uncommon to find proliferation below 20°C. Next put the top and bottom metal covers back in place with the screws you removed earlier. 0. Temperature adjustment on a tankless heater is simple. Most water heaters will already be set to this temperature when they’re installed. Each tankless water heater or POU device has a LED panel where you can adjust the desired temperature. Losses resulting in an annual expense of up to $ 500 dollars heat up the pipes the. 120 degrees Fahrenheit heater accounts for about 18 percent of your tankless water heater set to temperature. Way to heat water in the hot water temperature should a hot temperature setting of 120-degrees for... 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