Serial Number Age

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How Old Is My Luxaire Furnace?

Since late 2004, digits 2 and 4 of a York, Luxaire or Coleman serial number make the year and letter 3 is the month; older serials use two letters. Type the serial number from your furnace's data plate below.

Luxaire furnace age decoder

Type it exactly as printed. Spaces and dashes don't matter.

Where the serial number is on a furnace

FURNACEMODEL NO.SERIAL NO.N0D6653823
Example Luxaire serial number on a furnace data plate.

Take off the front lower panel (turn the power off first). The data plate is a metal or foil sticker on the inside of the door or on the side of the cabinet, next to the blower. The serial number is usually labelled "Serial No.", "S/N" or "Ser. No."

How to read a Luxaire serial number

Since late 2004, digits 2 and 4 of a York, Luxaire or Coleman serial number make the year and letter 3 is the month; older serials use two letters.

Late 2004 to today

P Y M Y ######

  1. Character 1 is the factory.
  2. Characters 2 and 4 together are the year: W0D5… gives 0 and 5, so 2005.
  3. Character 3 is the month: A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, K = September, L = October, M = November, N = December (no I or J).

Example: N0D6653823

1971 to 2004: 4 letters, then 6 digits

P M Y L ######

  1. Letter 2 is the month (same letters as above).
  2. Letter 3 is the year: A = 1971 or 1992, B = 1972 or 1993, C = 1973 or 1994, D = 1974 or 1995, E = 1975 or 1996, F = 1976 or 1997, G = 1977 or 1998, H = 1978 or 1999, J = 1979 or 2000, K = 1980 or 2001, L = 1981 or 2002, M = 1982 or 2003, N = 1983 or 2004, P = 1984, R = 1985, S = 1986, T = 1987, V = 1988, W = 1989, X = 1990, Y = 1991.
  3. Ignore a letter in brackets at the start, such as (S).

Example: WFKM003055

When one serial fits two dates: Year letters A to N were used twice, 21 years apart. Look for the ANSI standard year on the label, the style of the unit, or the age of the house. A 1970s unit is now over 45 years old and rare.

How long does a furnace last?

Most furnaces last 15 to 20 years. Yearly servicing, the local climate and how hard it works all move it within that range. Past 15 years, it is worth getting a replacement price before the unit fails, so you aren't forced into a rushed decision.

Furnaces made before 1992 were built before the federal 78% efficiency minimum. If yours is that old, a new 95% furnace could cut your heating fuel use by a quarter or more.

Questions

How do I find the age of my Luxaire furnace?

Since late 2004, digits 2 and 4 of a York, Luxaire or Coleman serial number make the year and letter 3 is the month; older serials use two letters. You'll find the serial number on the data plate. Take off the front lower panel (turn the power off first). The data plate is a metal or foil sticker on the inside of the door or on the side of the cabinet, next to the blower. The serial number is usually labelled "Serial No.", "S/N" or "Ser. No."

How long does a Luxaire furnace last?

Like most furnaces, a Luxaire typically lasts 15 to 20 years with regular servicing.

Why does my serial number give two possible dates?

Year letters A to N were used twice, 21 years apart. Look for the ANSI standard year on the label, the style of the unit, or the age of the house. A 1970s unit is now over 45 years old and rare.

Related

How sure are these dates? Checked against official records (recall notices or data plates with printed dates). How we test the decoder.

Keeping an older furnace going