Another Furnace Age ?

[Richard W. Washington]

These three furnaces were from a 1988 build 5800 sq ft home. Any idea on age?

M-THP120A960A1
S-CO8302646

M-THP050A936A
S-CO8301741

M-THP120A960A1
S-CO8302645

Around here the furnace is only used 6 weeks a year so if it is originial it would not be surprising.

[Richard W. Washington]

The Furnaces were Trane.

[Jae Williams]

Trane used alpha codes in their serial numbers to determine year of manufacture. They started this in 1987 with the letter B and skipped the letters I, O, Q, U, Z
In 2002 they started their serial numbers with the year it was built.
The first letter of the serial number gives the year of manufacture as follows:


9=2009 8=2008 7=2007 6=2006 5=2005 4=2004 3=2003 2=2002
Z=2001 R=2000 P=1999 N=1998 M=97 L=96 K=95 J=94
H=93 G=92 F=91 E=90 D=89 C=88 B=87 S=86 Y=85 X=84 W=83
U=82(seventh digit) T=81(seventh digit) O, A=80(seventh digit)

Looks like 1988 on all three.

[Richard W. Washington]

Jae,

Thanks a bunch for your help. I had a stinkin suspicion that were 88 but did not want to guess. Thanks for the Trane info. Will save it for later. Take care.