Rheem serial number lookup

Rheem serial numbers do not follow one rule. The date code depends on the product, so choose the equipment first.

Decode a Rheem serial number

Look for “Serial”, “Serial No.” or “S/N” on the rating plate. It is not the model number. What you type stays in your browser.

Rheem decoders by product

Rheem water heaters

The serial number is on the rating label on the heater. On a Rheem water heater built since 2012, the serial starts with a letter, then two digits for the week and two for the year. Older serials start with the month and the year.

2 formats on record: plant letter, then week and year (built since 2012); month and year, first four digits (built until 2012 or 2013).

Rheem furnaces, AC and heat pumps

The serial number is on a tag on the back of the outdoor unit or inside the front cover of the indoor unit. In a Rheem furnace or air conditioner serial, the two digits after the last letter are the week and the next two are the year.

One format on record: plant letter, then week and year (built since the early 1990s).

About Rheem

Rheem Manufacturing Company of Atlanta has been owned by Paloma of Japan since 1988. Rheem bought Ruud in 1960 and launched the Richmond water heater line in 1983. Rheem and Ruud share one serial code for water heaters and a different one for furnaces and air conditioners.

Related brands: Ruud, Richmond, GE.

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