Daikin Serial Number Decoder

Decode your Daikin HVAC serial number to find manufacture year, week, and age. This decoder works for Daikin USA units manufactured at the Goodman facility in Houston, Texas.

Serial Number

Brand (optional — leave blank to auto-detect)

📍 Where to Find Your Daikin Serial Number

✓Outdoor unit: Data plate on the back or side of the condenser
✓Air handler: Side panel exterior sticker
✓Daikin units manufactured in Houston, TX use the same labeling as Goodman

🔤 Daikin Serial Number Format

Daikin North America (which owns Goodman) uses the same serial number format as Goodman for units manufactured in North America: the first 4 digits encode YYWW (year + week). Example: "1103ZZZZZZZ" = year 11 = 2011, week 03 = third week of January 2011. Note: Daikin units manufactured in Japan for the US market may use different formats.

1103ZZZZZZZ

First 4 digits "1103": Year 11 = 2011, Week 03 = 3rd week of January 2011.

1948XXXXXXX

First 4 digits "1948": Year 19 = 2019, Week 48 = late November 2019.

2215YYYYYYY

First 4 digits "2215": Year 22 = 2022, Week 15 = mid-April 2022.

How Daikin Serial Numbers Work

Daikin Industries, Ltd. is a Japanese multinational corporation and the world's largest HVAC manufacturer. In 2012, Daikin acquired Goodman Manufacturing, giving it a major foothold in the North American HVAC market. For units manufactured at Daikin/Goodman's North American facilities (primarily the massive Houston, Texas plant), the serial number format follows Goodman's YYWW convention: the first four digits are the two-digit year followed by the two-digit week of manufacture. Daikin also sells ductless mini-split and VRV commercial systems that may use different serial number formats from their Japanese manufacturing operations.

Why Decode Your Daikin Serial Number?

Daikin serial decoding helps with warranty claims, energy efficiency assessments, and planning refrigerant transitions. Daikin has been a leader in R-32 refrigerant adoption, which has lower global warming potential than R-410A.

💡 Pro Tips

Daikin and Goodman use identical serial formats for North American manufactured equipment. Amana HVAC is also the same. For Daikin ductless systems (mini-splits), the format may differ — contact Daikin support at 1-855-324-5461 for those units.

Frequently Asked Questions

Is Daikin the same as Goodman?

Daikin owns Goodman. North American Daikin units are manufactured in Goodman facilities and use the same serial format.

How long do Daikin HVAC units last?

Daikin units are known for excellent build quality. They typically last 15-20+ years, often outperforming the industry average.