![]() ![]() Corrosion: Visible corrosion on your water heater is a worrying sign, and it means that it should be replaced as soon as possible.Older water heaters are less efficient, so your bills might increase over time. Elevated Electricity or Heating Bills: Almost 20% of your annual household energy bills cover the costs of heating your shower and other hot water.Less Hot Water: If there is less hot water available than there used to be when you are taking a shower, it might be a sign that your hot water heater is accumulating sediment or unable to provide enough heat for an average shower.Age of the Unit: Once the water heater is past the 10-15 year mark, it will be less energy efficient and need to be replaced.Some of the signs that you need to replace your water heater include: ![]() Water heaters are designed to be durable and last a long time with proper maintenance, but there are subtle signs that can indicate it’s time to replace sooner rather than later. Once you determine the age of your water heater, you should take steps to think about whether or not it’s time to replace it. When Should You Replace Your Water Heater? Newer models use letters to represent the month and year, but in older water heaters that were manufactured before 2010 they used exclusively numbers. Rinnai: Rinnai’s water heaters use two different serial number patterns.Much like other companies, they use the A-M system to signify the month and then use two digits after it to represent the year. The initial two numbers stand for the manufacturing year, and the second numbers stand for the week of the year. In the first format, the first two numbers are the year and the second set of numbers are the week. The serial number of a state water heater will start with four numbers. One uses only numbers and another uses a combination of letters and numbers. State Industries: This manufacturer has a confusing formula to determine the age of your water heater.Smith does, including the differences between models made between 1997-2008 and after 2008. ![]() Smith, so they use the same code that A.O.
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