Furnace Age Help Comfortmaker

[Rick K. Kie]

Comfortmaker With an RPJ Heat Exchanger

Model G-U 400100-12M-P
Serial # 0000211401-L26-009

[Bob Elliott]

Originally Posted by rkie

Comfortmaker With an RPJ Heat Exchanger

Model G-U 400100-12M-P
Serial # 0000211401-L26-009

This is what I have.
I think Tallen posted it.

Comfortmaker (International Comfort) uses the first letter for the month
(skipping I) and the first two digits are the year.

So could be 2000

[Rick K. Kie]

It says to use the first letter followed by 9 numbers. I see no letters
There is excessive rusting for it to be a 2000 I think

[Bob Elliott]

Originally Posted by rkie

It says to use the first letter followed by 9 numbers. I see no letters
There is excessive rusting for it to be a 2000 I think

Thats all I have, and figured the first 0 might have been a letter.

You could try the site called furnace compare

[Rick K. Kie]

I'll Try that thank you

[Bob Elliott]

http://www.furnacecompare.com/manufa...fortmaker.html

[Russel Ray]

Originally Posted by rkie

Comfortmaker With an RPJ Heat Exchanger

Model G-U 400100-12M-P
Serial # 0000211401-L26-009

Your serial number appears to be backwards. Perhaps a newbie serial number stamper at the plant who didn't know better. Wouldn't be the first time I've found that.

If I reverse the serial number to 009-L26-0000211401, then it matches the Comfortmaker serial numbers I have in my file, seeming to indicate a November 1992 or November 2002 unit. It wouldn't be 1962, 1972, or 1982 because they used a different serial number system in those years.

Combine that with construction date of the house or manufacture date of other appliances and see if you can match it up.

[Rick K. Kie]

Thanks for your input Russel.
The house was built in 1950 there are moisture issues in the basement and there is 3/8 of an inch of rust right outside burner tubes with 1/4" layer inside the tubes.
The report has been sent I had to write unable to termine the age.
Clearly its time for a new heat exchanger at least if not a new furnace.