Janitrol Serial Number: How Old Is My Janitrol Furnace or AC?
The first two digits of a Goodman, Amana or Janitrol serial number are the year and the next two are the month. Type the serial number below for the exact month and year.
About Janitrol
Goodman bought Janitrol in 1982. Janitrol units built since then use the Goodman code.
Where to find the serial number
Furnace: 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."
Air conditioner: On the outdoor unit (the condenser), look for the data plate on the side panel, often near the electrical box where the power cables go in. The indoor coil or air handler has its own plate with a different serial number.
How to read a Janitrol serial number
The first two digits of a Goodman, Amana or Janitrol serial number are the year and the next two are the month.
10 digits, all numbers
YY MM ######
- Digits 1 and 2 are the year: 16 means 2016.
- Digits 3 and 4 are the month: 09 means September.
Example: 1609123456
Older 9-digit serials
YY #######
- Digits 1 and 2 are the year. The month is not shown.
Example: 001112581
Packaged terminal units (hotel-style wall units) built for Goodman by Daikin use letters and are not decoded yet.
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.
Questions
How do I tell how old my Janitrol furnace is?
Find the serial number on the data plate and read it with the Janitrol code: The first two digits of a Goodman, Amana or Janitrol serial number are the year and the next two are the month. Or type it into the decoder on this page.
Is the manufacture date printed on the label?
Often, yes, especially on newer units and water heaters. Look for "Mfg. date", "MFD" or "Date of manufacture". If there is a printed date, it is more reliable than decoding the serial number.
Who makes Janitrol?
Janitrol is made by Goodman (Daikin). The same serial code is used by Goodman, Amana.
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
- Furnace air filter: Change it every 1 to 3 months. Check the size printed on the old filter.
- Carbon monoxide detector plug in: Any gas furnace, and especially an older one, should have a CO alarm nearby.
- Smart thermostat: Cuts run time on any system, old or new.