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Style 1:

The Date of Manufacture is in the first four digits of the serial number and represent the week and year of production:


40 06 A17320

40 Week

06 Year


Style 2:

The first four digits of the serial number represent the year and month of production:


85 03 05091

85 Year

03 Month


Style 3:

The first two digits of the serial number represent the month and year of manufacture:


W 4 D14108

W (Month) September

4 (Year) 1984


M January                     T July

N February                    V August

P March                        W September

Q April                           X October

R May                            Y November   

S June                           Z December


0 1980

1 1981

2 1982

3 1983

4 1984


Style 4:

The first two digits of the serial number represent the month and year of manufacture:



A 1 67990

A (Month) January

1 (Year) 1971


A January                   G July

B February                  H August

C March                      I September

D April                         J October

E May                          K November

F June                         L December

0 1970                   5 1975     

1 1971                   6 1976     

2 1972                   7 1977

3 1973                   8 1978     

4 1974                   9 1979

Carrier is a leading name in the HVAC industry, renowned for its high-quality and innovative air conditioning systems. Here are some key points about Carrier air conditioning systems:

1. **History and Reputation**:
   - Carrier was founded by Willis Carrier, who invented modern air conditioning in 1902. The company has been a pioneer in the HVAC industry since its inception.
   - Known for its reliability and cutting-edge technology, Carrier is a globally recognized brand synonymous with high-performance HVAC solutions.

2. **Product Range**:
   - Carrier offers a diverse range of air conditioning systems, including central air conditioners, ductless mini-split systems, heat pumps, and packaged systems.
   - Their product line caters to residential, commercial, and industrial markets, providing solutions for a variety of cooling needs and building types.

3. **Energy Efficiency**:
   - Carrier is known for its energy-efficient air conditioning units, with many models achieving high Seasonal Energy Efficiency Ratio (SEER) ratings.
   - Some of their top-tier models, like those in the Infinity® series, offer SEER ratings up to 26, significantly reducing energy consumption and utility costs.

4. **Features and Technology**:
   - Carrier incorporates advanced technology in their air conditioning systems, such as Greenspeed® Intelligence, which allows for variable-speed operation, providing precise temperature control and high energy efficiency.
   - The Infinity® series features the Infinity Touch Control, a smart thermostat that offers remote access, detailed energy reports, and customization options for enhanced comfort and efficiency.
   - Carrier units are designed for quiet operation, with features like sound blankets and compressor sound reduction.

5. **Warranty**:
   - Carrier provides robust warranty programs, typically offering a 10-year limited warranty on parts for many of their air conditioning units.
   - Extended warranties and additional protection plans are available, offering customers extra peace of mind.

6. **Manufacturing and Support**:
   - Carrier air conditioning products are designed and manufactured with a strong emphasis on quality and durability.
   - The brand has a vast network of certified dealers and service technicians, ensuring professional installation, maintenance, and support services.

7. **Innovation and Sustainability**:
   - Carrier is committed to innovation and sustainability, continuously developing new technologies to improve energy efficiency and reduce environmental impact.
   - They have a strong focus on eco-friendly refrigerants and sustainable manufacturing practices.

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