Daikin Serial Number Lookup

Posted by: Mas Broto

Daikin serial number come in various styles, each with a distinct flavor. Whether it’s the new style with a straightforward year and month code or the old, more complex variety, every style has a rhythm and reason. Understanding each style of Daikin serial numbers is crucial for accurate information and how to decipher.

Throughout this article, I’ll guide you through the different styles of Daikin serial numbers. We’ll break down each variation so you can identify and interpret your unit’s background with ease.

Locating the Serial Number

Alright, let’s break it down by system type because not all heroes wear capes—some come with service manuals and a knack for finding serial numbers.

For Central Air Conditioner: Head outside to the condenser unit—yep, that big box that hums like it’s meditating on a hot day. The serial number should be on a data tag, typically on the side or near the electrical connections. It’s usually a metal plate or a sticker that’s playing it cool in the shade of the unit’s housing.

Daikin Serial Number Location

For Furnace: Look for the service tag on the furnace’s exterior casing. It’s usually around the burner compartment or near the electrical controls. If it’s playing a mean game of hide and seek, you might have to remove the front door panel.

How to Read the Daikin Serial Number

To decode a Daikin serial number generally, you’ll need to look for patterns that can reveal the unit’s manufacturing date, production line, and other identifying information. While there may be variations depending on the specific model and the year it was made, here’s a general breakdown that can often be used:

  1. Year of Manufacture: The year is typically represented by the first two digits after any letters at the beginning of the serial number.
  2. Month of Manufacture: Following the year, the next two digits are often the month. In a 12-month calendar, numbers from 01 to 12 correspond to January through December.
  3. Sequential Production Number: After the date code, the remaining digits are usually a sequential number that indicates the specific unit’s production run order.

For example, in the serial number sequence:


FB might refer to the type of unit or series.
OU could potentially be a factory code.
09 suggests the manufacturing year 2009.
05 suggests the manufacturing month, May.
048200 is likely the unique production number.

To decode a serial number for any Daikin HVAC unit, you would apply these general rules, looking at the specified position of the digits within the serial number to ascertain the manufacturing date. Remember that these interpretations can vary, and it is best to consult with Daikin or a professional HVAC technician for the most accurate dating.

For the most accurate information on decoding a Daikin serial number, refer to the documentation provided with your unit or contact the company directly. They may also offer resources or customer support services for serial number interpretation.

How do we identify the Daikin HVAC Age from the Serial Number?

To identify the age of a Daikin HVAC unit from its serial number, you typically need to decode the part of the serial number that represents the date of manufacture. Most often, this information is contained in the first few digits following any initial letter or letter. Here is a general method you can use:

Look for the MFG Date Code

This serial number format explicitly states the manufacturing date alongside the serial number. The date code usually consists of the year of manufacture.

For example, in the serial number sequence:

A000123 with MFG. DATE 2011-1

A could be an identifier for the type of unit or series.
000123 is the unique production number for the unit.
MFG. DATE 2008-1 tells us the unit was manufactured in January 2011.

Interpret the Numbers (or Letters)

Depending on Daikin’s format, interpret the numbers (or letters) according to their guideline.

If the serial number starts with L0112…, it could mean that L is a plant code, 01 represents the year (2001), and 12 represents the month (December).

For a serial number like 2017M123456, 2017 might directly indicate the year of manufacture. M (the 13th letter) could stand for December if the company uses a letter system.

For example, in the Daikin serial number sequence:


In this example, the date of manufacture is coded in the first six digits of the serial number, representing the year and week of manufacture.

The first two digits, 22, represent the year, which is 2022.

The next four digits, 4445, could be interpreted as the 44th week and 45th week, respectively, suggesting the unit was manufactured during the late October to early November timeframe of 2022.

Daikin, like many manufacturers, may change its serial number format over time. This means that the exact method for determining the manufacture date may vary between different models and years of production. If you’re looking at a newer model, the year could be represented by four digits, allowing for easy recognition. For older models, they might have used two digits, making it a bit trickier, especially considering the rollover of decades.

Important Note: Always refer to unit’s specific documentation or contact Daikin customer support for the most accurate information. They can provide detailed instructions on how to read the serial numbers for their products, as decoding methods may vary significantly across different units and manufacturing dates.

Daikin’s acquisition of Goodman and Amana did result in some crossover in manufacturing processes and perhaps even in the standardization of certain procedures. However, when it comes to serial number formats, each brand typically maintains its own system that reflects its manufacturing record-keeping and product identification methods. While there might be similarities, the serial number formats for Goodman and Amana may differ from those of Daikin-branded products.

Why You Need a Serial Number

First off, it’s the fountain of youth for your unit. Knowing the age of your Daikin HVAC is essential, especially when assessing its performance, planning for replacements, or scheduling maintenance. The serial number tells you when your unit was manufactured—information that’s invaluable whether you’re troubleshooting with tech or bragging about your unit’s longevity.

And it doesn’t stop there. When it’s time to register your product—because, let’s face it, you want that extra warranty coverage—the serial number is your passport. It’s the all-access pass to securing extended service agreements and benefits that only registered users can boast about.

And let’s not forget authenticity. In a world brimming with imitations, your serial number is the hallmark of a true Daikin unit. It reassures you that you have a genuine product, not a faux that’s tiptoed into your space under the guise of the real deal.

So there you have it. The serial number is more than just a jumble of characters. It’s a key to unlocking peace of mind, a cornerstone of your unit’s identity, and a non-negotiable part of responsible homeownership. Keep it safe, and it will pave the way to a smoother, more efficient HVAC experience.


In conclusion, understanding how to read a Daikin serial number is a valuable skill for any HVAC professional or homeowner looking to keep their system in tip-top shape. While serial numbers may seem like a cryptic mix of digits at first glance, each number tells a detailed story about the unit’s origin, age, and manufacturing details.

This knowledge allows for more accurate service schedules, troubleshooting, and, when necessary, validating warranty claims. It’s important to remember that company may update its serial number formats over time, so it’s always wise to double-check with the latest company guidelines or consult with a Daikin representative to ensure accurate information.

With the correct approach to serial number lookup, you can ensure that you have all the information at your fingertips to make informed decisions about maintenance, repairs, or replacements of your Daikin HVAC unit, ensuring it continues to operate efficiently for years to come.

Find trusted HVAC pros in your area and receive FREE, no-commitment quotes for your project.
Find Pros
Photo of author
Mas Broto
Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.