You might find this format similar to the first style, but the letters after the four numbers upfront are for the ID code. The manufacturer’s serial number consists of numbers only, whereas Units serial number has letters imbued with the numbers. The manufacturer’s serial number is different from the unit’s serial number so you might get confused between the two. The fourth one on our list consists of a plant line code followed by the month, year, and factory coding. Instead of the month, the week number of the year is used at the first two digits of the serial number, while the third and fourth determines the end year number. You can refer to the plant code on Ruud Water Heater Age. The third style begins with a plant code, followed by the week number, then the year. The third style that we have is different from styles 1 and 2. However, a serial number with a prefix of RHLN on the tag has a manufacturing date printed on the label as MFG. The difference is that the second style doesn’t have the Plant line code, unlike the first style. The first two numbers correspond to the number order of the month, while the 3 rd and 4 th numbers correspond to the end year. The second style that we have is similar to the first style on our list. After the four digits, you will see a letter corresponding to the plant line code. The first style has the order of Month, Year, and plant line code. MMYY/plant line code/consecutive serial number So how will you be able to know which Ruud water heater serial number is the correct one as your reference in telling the age of the water heater? Here are the different styles of serial assignment in the RUUD water heater. Since the company is already building for over a century ago, it is understandable that they’ll have different formats of serial number assignments, which is a little confusing for those who do not know. Since then, RUUD has been one of the leading manufacturers of cooling and heating products in the whole state of America. Do you want to share the secret? Then, get your place and read until the end of this article.ĭid you know that the first one that invented the water heater that we enjoy today was the primary owner of the Ruud Company that still exists today? For more than a century from today, Edwin Ruud invented the hot and cold water heater, which we enjoy until today. Well, I was in the same situation as you are, but after a series of scrolling through the web and researching for a way to know the age, I have found the easiest way to do it. Have you recently purchased a new or used Ruud water heater? Knowing the unit’s age is proven to help you determine whether the appliance will last long or not, especially if it is second-hand bought from a thrift store.
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