Carrier Geothermal SystemHow to Decode

Carrier is the world's largest provider of HVAC systems, founded by Willis Carrier, the inventor of modern air conditioning.

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Carrier Geothermal System — Type

Brand

Carrier

Equipment Type

Geothermal System

SEER Range

25-45 EER

Expected Lifespan

20-25 years

Serial Format

Week-Year (WWYY)

Warranty

10-year limited parts

Current Refrigerant

R-410A / R-32

Headquarters

Palm Beach Gardens, FL

Carrier Serial Number Decoding Table

Example

3405E12345

Positions	Field	Value	Meaning
1-2	Week of manufacture	34	Week 34 (August)
3-4	Year of manufacture	05	2005
5	Plant identifier	E	Manufacturing facility E
6-10	Sequential unit number	12345	Production sequence #12345

Carrier Model Number Decoding Table

Example

24ACC636A003

Positions	Field	Value	Meaning
1-2	Product type	24	Air conditioner (outdoor)
3-5	Model series	ACC	Comfort series AC
6-8	Capacity (BTU/h)	636	63,600 BTU (5.3 tons)
9	SEER tier	A	Base efficiency tier
10-12	Revision / voltage	003	Revision 003, 208/230V

Carrier Geothermal System -- Overview

Carrier manufactures a comprehensive lineup of geothermal system models ranging from entry-level to premium high-efficiency units. With SEER ratings spanning 25-45 EER, Carrier offers options for every budget. These units are backed by 10-year limited parts.

The typical lifespan is approximately 20-25 years with regular maintenance. Our decoder tool can instantly tell you the exact age and condition of your unit.

How to Decode Your Carrier Geothermal System Serial Number

Every Carrier HVAC unit has a unique serial number that encodes critical information about the unit. Carrier uses a Week-Year (WWYY) format, where specific characters represent the manufacturing date, production facility, and unit sequence number.

For example, the serial number "3405E12345" can be decoded as follows: the first characters indicate the manufacturing date, while subsequent digits identify the production line and unit number. Our free decoder tool automatically parses this format and reveals the complete manufacturing history.

Maintenance Schedule for Carrier Geothermal System

Replace or clean air filters: Every 1-3 months. Clean condenser coils: Annually (spring). Check refrigerant levels: Annually. Inspect electrical connections: Annually. Clean evaporator drain line: Every 6 months. Test thermostat calibration: Annually. Inspect ductwork for leaks: Every 2-3 years.

Carrier Geothermal System Efficiency Over Time

Carrier has continuously improved efficiency to meet evolving federal standards. In 2006, the minimum was raised to SEER 13. In 2015, southern states moved to SEER 14. In 2023, new SEER2 standards took effect: 14.3 SEER2 (South), 13.4 SEER2 (North). Modern Carrier models range from 14 to 26+ SEER.

Regarding refrigerants: Carrier units before 2010 likely use R-22 (phased out since 2020 -- expensive and harmful). Units from 2010-2023 use R-410A. Newest models use R-32 or R-454B to meet EPA regulations. Knowing your refrigerant is critical -- R-22 refills cost $100-200+ per pound.

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FAQ

How do I find the age of my Carrier HVAC unit?

Enter your Carrier serial number into our free decoder. Carrier uses a Week-Year (WWYY) format. We parse it instantly and calculate the exact age, plus a condition status.

Is Carrier a good HVAC brand?

Carrier is one of the most established manufacturers, founded in 1915 with over 111 years of experience. They offer 10-year limited parts and consistently rank among top brands.

What does a Carrier serial number look like?

Carrier serial numbers follow a Week-Year (WWYY) format. Example: "3405E12345". Find it on the metal data plate on the unit.

How long is the Carrier warranty?

Carrier typically offers 10-year limited parts on residential equipment when properly registered.