How old is my Roper unit?

Roper is part of Whirlpool Corp. 3 serial formats sourced across refrigerator, range, dishwasher, washer, dryer, microwave.

• Roper refrigerator serial numbers in the 1990 to present format encode the year as position 2 via table (table below) and the week as digits 3-4 (source: building-center.org).
• Example: serial MX040676 decodes to week 4 of 1990 or 2020.
• The 1990 to present format is ambiguous: Year code REUSES letters: 2020-2032 repeat the 1990-2002 letters (X..L), and 2011-2019 are digits, so a 1990s letter and a 2020s letter are indistinguishable without model era. 1970-1989 used a single digit (0-9 twice). Note: the building-center chart shows W=2019 which is almost certainly a typo for W=2009 (9=2019 on the same chart) - flag for verification against a second source. Maytag pre-2006 and Amana pre-2002 used their own formats (ESTIMATE, not fetched).
• Roper refrigerator serial numbers in the 1990 to present format encode the year as single character after the plant letter(s); cycles every 30 years (1990-2019 = X,A-J,K-Y then digits 0-9 for 2010-2019; X,A.. again from 2020) and the week as the two digits after the year character (01-53) (source: building-center.org).
• Example: serial MX06404786 decodes to week 6 of 1990 or 2020.
• The 1990 to present format is ambiguous: TABLE CONFLICT for 1999-2010: building-center (the table already in formats.json) says I=1999 J=2000 K=2001 L=2002 M=2003 P=2004 R=2005 S=2006 T=2007 U=2008 W=2009 Y=2010; appliancedates says J=1999 K=2000 L=2001 M=2002 P=2003 R=2004 S=2005 T=2006 U=2007 W=2008 Y=2009 0=2010; Sears PartsDirect (official Sears, current) says J=1999 K=2000 L=2001 M=2002 N=2003 P=2004 R=2005 T=2006 U=2007 W=2008 Y=2009 0=2010. Two of three sources put K=2000, Y=2009 and 0=2010 (the building-center chart has no 0 and uses I, which Whirlpool otherwise skips) so treat the building-center table as off-by-one for 1999-2010 until a Whirlpool document settles it. All three agree X=1990..H=1998 and 1-9=2011-2019, X=2020, A=2021.. Letters repeat every 30 years, so model era is needed to pick 1991 vs 2021. Worked examples: MX06404786 = 2020 wk 6 (appliancedates, Maytag dryer MED7230HW0); MB1402320 = 1992 wk 14 (appliancedates Kenmore); RA01xxxx = wk 1 of 1991 or 2021, FM644xxxx = wk 44 of 1986 or 2016 (Sears).

Decoder pages by product

Format eras

• 1990 to present VERIFIED
  AA######Refrigerator, Range, Dishwasher, Microwave, Washer, Dryer
• 1990 to present VERIFIED
  AA########Refrigerator, Range, Dishwasher, Microwave, Washer, Dryer
• 1970 to 1989 PARTIAL
  no date in serialRefrigerator, Range, Dishwasher, Microwave, Washer, Dryer

What we could not confirm

• Roper is treated as sharing Whirlpool's format because the source lists it in that family; the corporate relationship itself is an estimate.
• The 1970 to 1989 format is only partially confirmed (PARTIAL).
• The 1970 to 1989 format is documented but not decodable here: no example serial.
• No official online lookup URL was verified for Roper.
• Building-center (note the misspelled slug 'roper-applinaces') = Whirlpool style 1 charts. Kenmore prefixes 103/278/647/835/911/917 = Roper. No Roper website (roper-appliances.com dead).

Sources

• https://www.building-center.org/whirlpool-appliances/
• img: whirlpool-1990-present-1.jpg + whirlpool-1970-to-1989.jpg (transcribed)
• https://appliancedates.com/MajorAppliances/WhirlpoolDateCodes.htmlofficial
• https://www.searspartsdirect.com/diy/article/how-to-find-the-age-of-your-kenmore-washer-or-dryerofficial
• https://www.searspartsdirect.com/diy/article/how-to-find-the-age-of-your-kenmore-refrigeratorofficial
• https://www.building-center.org/roper-applinaces/

Roper refrigerator Roper range Roper dishwasher Roper washer Roper dryer Roper microwave Whirlpool Corporation family Guides