Rheem Serial Number Date Codes

[Adele Maione]

This style begins with 4 letters followed by a space and then a letter, either an F, M, G, or N, which indicates the plant where the unit was made. The letter is followed by 4 numbers which represent the manufacture date. The last 4 numbers are the manufacturing sequence.

Rheem Serial Number Date Codes
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In this style, the date code is located in the middle of the serial number. The number will start with 2 letters and 3 numbers followed by a space. The first letter after the space refers to the factory. The next 4 numbers indicate the date and the last 5 numbers represent the manufacturing sequence.

This style is similar to style # 3 but does not include any spaces within the number. In style # 7, the first 4 characters will be numbers followed by a letter. The four numbers following the letter are the date code.

In order to determine your RHEEM furnace age, all you need is the serial number. On some models, the year of the manucture is simply listed as manufacture date on the data plate. Most often Rheem uses some codes in their serial numbers to identify the furnace age and other pieces of information.

The RHEEM furnace age is encoded into the serial number. The company accomplish this in different ways and changed the way perform it over the years. Most new Rheem furnace systems use two serial number styles to determine the manufacture date.



Starts with a letter followed by numbers. The date of manufacture is coded in the 4 numbers following the letter in serial number. This 4 numbers represent the week and year of production. The letter represent the factory location.

Follows the letter in the middle of the serial number. The date of manufacture is coded in the 4 numbers following the letter in middle of serial number. This 4 number represent the week and year of production.

Thats all information about how to identify your RHEEM furnace age by serial number. If you have any issues with finding Rheem serial number nomenclature or how to decode it, contact the HVAC professionals. They would be pleased to help you get the information you need and make sure you get the right advise for your HVAC system.

This New Zealand Rheem water heater was manufactured 14/05/2007 and sports a serial number of 0723.

On Rheem tankless water heaters the serial number is located inside of the heater body on the right side.

On Rheem heat pump water heaters the serial number is located on a label on the upper left side of the unit.

Rheem current 10-digit serial number code: MMYYP12345 where

P is the plant code and 12345 a consecutive unique ID and of course MM YY are month and year of production.

This serial number may be prefixed by R, RN, RNG, RHNG or other letter combinations.

Rheem 8-digit serial number: 1234WWYY ?

Uncertain, possibly WWYY are week number and two-digit year number for older Rheem water heaters like the Rheemglas glass lined water heater


Rheem 9 digit serial number code with alphabetic prefix: ABCDMMYY2345

MM and YY are the month and year of production.

ABCD in this serial number format may be 1 to 4 alphabetic characters in length: R, RN, RNG, RHNG, RHUNM or other letters. The MMYY are the first numeric characters in the code.

Example: RN 1292A29282 - 12 92 or December 1992

Alternative Rheem 9 digit serial number code using week number, with initial character: ZWWYY12345

WW is the consecutive week number (1-52) and YY is the two digit year code

Rheem 10 digit serial number code without plant code: MMYY123456

MM YY are month and year of production.

This serial number may be prefixed by R, RN, RNG, RHNG or other letter combinations.

Alternative Rheem 10-character serial number code without plant code: MM.YY-123456
MM.YY are month and year of production.

This serial number format is used on some Rheem tankless water heaters.

Rheem 11-character serial number code with plant code: MMYYP123456

MM YY are month and year of manufacture, P is a plant code.

This serial number is used on certain Rheem tankless water heaters.

Rheem 12-character serial number code: B950-3138 RCY-5

This serial number was provided by reader Nick 2018-08-27 and has not been precisely de-coded.

Nick adds that the heater was made on or before 1978 and he speculates tht the B950 could refer to B-Baltimore and 950 to 9 - September and 50 - 1950.

However Rheem does not have and appears not to have had a manufacturing facility in Baltimore, Maryland.


Sid

If that's a Rheem serial number, it doesn't exactly match the 9 Rheem water heater age decoder formats given above, but a reasonable guess is

CNYYMM or less likely CNMMYY so that's Dec 2007 - (my second example)

You can do a sanity-check on a water heater decoded age by sharing (with us) some basic data such as

The country and city where the water heater is installed

The age of the building

and for more detailed guidance please check out

DATA TAG DECODING ADVICE for NON-STANDARD DATE CODES - general procedure


Mod - approximately 1961 Plant City, FL only other picture is of a cover plate. Any serial number tag may be hidden on the backside of unit under cabinet. Thanks for the interest.
On 2020-04-26 - by (mod) - Age of Frigidaire Part No. 3429120 water heater made by Rheem

Thanks for the puzzle, Adam.

Indeed Rheem WATER HEATER model PGW-120B sporting serial number SN. A68CN3X doesn't quite fit the known serial number decoding patterns for Rheem.

There are other ways to make a reasonable guess at the age of an older water heater (that you referred to as a boiler)

How old is the building where the heater is installed ? - this is close to the oldest the water heater (calorifier, geyser, hot water cylinder are synonyms) might be, more or less

Is this the original water heater or a replacement ? making it newer than the building.

Are there any manuals around? Those will have publication dates and often as well a hand-written installation date.

Are there service or data tags or notes on or close to the boiler itself? Those can set a likely installation or first-service date.

Post a photo of your boiler and using a second comment post a photo of its data tag and I'll research further.

More help at figuring out the age of a water heater when the serial number or data tag is missing, incomplete, or confusing is at

WATER HEATER AGE GUESSER


Jane

Indeed you give one of the two key data for finding the age of a water heater - for most cases: it's serial number

The other key datum needed is the brand - since serial number decoding is generally brand dependent.

If we had a mystery guest water heater who refused to give her name but would give her serial number I would venture a wild guess and say she was born (made) in February 1996.


Nick

Typically on a Rheem water heater thte age is encoded in a 10-digit serial number as MMYYa12345

Your heater's serial No. is B95-3138 RCY-5 which of course doesn't fit the schema of newer Rheem units.


You will need your product name and model number as well as serial number to look up the exact information for your unit. For example, the HPWH has a 10-year tank leak warranty and a 10-year parts warranty and a first year in-home labor warranty is included as well.

Serial number formats vary by manufacturer, with the installationdate placed differently in each case. Check the brand name on your water heaterand then use the following guide to determine the age of your unit:

On older models, you can determine the age of your unit by decoding the water heater serial number. Some manufacturers, including Rheem, made it easy by incorporating the month and year built into the first 4 digits of the serial number. For instance, the picture below shows that this Rheem water heater was manufactured in December of 1991 (1291). Other manufacturers use different formats, but in a similar fashion.

The Bradford White rating plate is the most difficult to decode. To find the age of a Bradford White tank, you have to understand their coding. The year of manufacture is noted by the first letter of the serial number, the month is the second letter. The decoding is based on the following format:
Year Decoder: G = 1990; H = 1991; J = 1992; K = 1993; L= 1994; M= 1995; N= 1996; P= 1997; S= 1998; T= 1999; W= 2000; X= 2001; Y= 2002; Z=2003; A= 2004; B=2005; C=2006; D=2007
Month Decoder: A= JAN; B=FEB; C=MAR; D= APR; E=MAY; F= JUNE; G=JULY; H= AUG; J= SEPT; K=OCT; L= NOV; M= DEC.

The most popular furnaces that have many years in the field include Carrier, Bryant, Lennox, Rheem and Goodman/Amana. Each of these brands have their own methods of identifying system age from serial numbers.

Your warranty is based on the date of manufacture and the warranty code listed in the model number. To verify if your water heater is in warranty you can call 1-800-621-5622 and listen for the prompt to take you to warranty.

Should you have a problem with your system, Rheem has developed the following guidelines to assure that your problem receives proper attention.



To better assist your independent HVAC contractor, please furnish the model and serial numbers on each piece of your equipment and the date of installation. First, determine the type of equipment from the two categories shown below. The photos and diagrams will help you locate the model and serial numbers of your equipment, if they are not found on your original warranty or sales invoice.
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