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How old is my Janitrol unit?

Janitrol is part of Goodman (legacy). 2 serial formats sourced across central air conditioner, heat pump, furnace.

Serial number decoder for Janitrol

Serial no.

Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.

Format example: 9704011000

Janitrol air conditioner serial numbers in the era not stated format encode the year as digits 1-2 (YY) and the month as digits 3-4 (source: building-center.org).
Example: serial 9704011000 decodes to April 1997.
Janitrol air conditioner serial numbers in the before 1985 format encode the year as digits 3-4 (YY = 1959) and the month as digits 1-2 (07 = July) (source: building-center.org).
Example: serial 0759F5616 decodes to July 1959.
Janitrol's official lookup at warranty.goodmanmfg.com returns warranty / registration lookup.

Decoder pages by product

before 1985 VERIFIED
####A####Furnace, Central Air Conditioner, Heat Pump
era not stated PARTIAL
##########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit

Official lookup: the authority

Open the official Janitrol lookup takes serial number; returns warranty / registration lookup; URL verified live

This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.

The era not stated format is only partially confirmed (VERIFIED-partial).
Janitrol is treated as sharing Goodman's format because the source lists it in that family; the corporate relationship itself is an estimate.
Goodman acquired Janitrol c.1982 and dropped the name in 1992. Style 1 9704011000 (mid-1980s on) = Goodman rule; style 2 0759F5616 (pre-mid-1980s Surface Combustion era) added. Any Janitrol unit still in service is 30+ years old.