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Most water heaters upon initial start-up can take several hours to heat the tank water to the setting on the thermostat. Also, if the setting is not at the hottest temperature and it is a large tank 12 hours isn't unreasonable. You should also be aware that if the entire tank of hot water is consumed for say a long shower it will take the incoming water ...


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Sadly not much. 100W would not effectively heat a 40 gallon water heater, let alone an 80 gallon. Also, remember that the panel likely won't really put off 100W unless your element has the exact right resistance for your specific panel. You can do some simple calculations if you're curious how much heat that will produce... If you use 100 Watts for 4 ...


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Another possible culprit beyond what JPhi1618 mentioned is that electric water heaters often have two heating elements. One at the top, one at the bottom. If the bottom one fails, the top one only heats a portion of the water, giving a short run time. Wikipedia has a nice description: https://en.wikipedia.org/wiki/Storage_water_heater A few searches in ...


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TL; DR: When the temperature is colder outside, your cold water is colder so you have to use more hot water for the same shower temperature. Facts: A shower head puts out 2.5 gallons per minute (GPM) (or close to it). To get the temperature you want, you have to mix hot and cold water. In the summer, the "cold" water temp is much warmer than it is in the ...


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Check all the supply valves to ensure they are open. It is not uncommon for old valves (particularly gate valves) to break whilst operating, leaving you with a low or no-flow situation (sometimes called a "dropped wedge"). This would require you to replace the suspect valve. If you did a DIY install, were any of the valves particularly corroded or hard to ...


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Not enough pressure in the system to guide the flow of hot water . Raise the water pressure using the flow control valve to 24 pounds and see if this corrects the issue.



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