Goodman is Daikin's value-focused American HVAC brand, popular for affordable furnaces, air conditioners and heat pumps with strong parts warranties. Goodman is owned by Daikin, the world's largest HVAC manufacturer, which acquired Goodman in 2012. Goodman, Amana-brand HVAC and Daikin's North American residential units share platforms and serial schemes.
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Goodman units use the Goodman serial scheme. Here is what each part of the serial number means, by production era:
| A | January |
| B | February |
| C | March |
| D | April |
| E | May |
| F | June |
| G | July |
| H | August |
| I | September |
| J | October |
| K | November |
| L | December |
A Goodman model number is usually built as [product series] · [cooling capacity in thousands of BTU] · [efficiency/SEER] · [voltage/phase] · [refrigerant/revision]. The capacity code is the most reliable part: divide it by 12 for the nominal tonnage — for example 036 = 3 tons, 048 = 4 tons. Enter your model number in the tool above to estimate the tonnage automatically.
Typical service life runs about 10–15 years for air conditioners and heat pumps and 15–20 years for furnaces. Most Goodman parts warranties run 5–10 years and often require registration within 60–90 days of installation. Decode the age above, then confirm exact coverage on the manufacturer's portal:
Open the official Goodman warranty portal →
Goodman is owned by Daikin, the world's largest HVAC manufacturer, which acquired Goodman in 2012. Goodman, Amana-brand HVAC and Daikin's North American residential units share platforms and serial schemes.
Visit the official Goodman website →
Brands that share the Goodman serial scheme:
Read the manufacture date from the serial number on the unit's data plate. Enter the Goodman serial number in the tool above and it decodes the year (and often the month or week) using Goodman's published serial scheme.
On the metal data/rating plate — usually on the side of the outdoor condenser, the side of the furnace, or inside the blower door. Look for “Serial”, “S/N” or “SER”.
Most manufacturer parts warranties run 5–10 years and often require registration within 60–90 days of install. Use the age from the tool as a guide, then confirm exact coverage on Goodman's official warranty portal (linked in the result).
The model number encodes the product series, the nominal cooling capacity (tonnage), and usually efficiency, voltage and refrigerant. Enter it above to estimate the tonnage; exact positions vary by product line.
Need a hand, a second opinion, or service on your Goodman unit in the Ottawa area? Cardinal HVAC can help.
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