Air conditioner model, serial and document guide
Keep equipment identifiers organized and find official air-conditioner literature without assuming that a serial format is supported.
Collect the right information
Record each component separately when your system has an outdoor unit and indoor equipment. Note which unit each photograph or service record describes. Preserve the full brand, model and serial; do not combine one component’s model with another component’s serial.
Use the manufacturer’s location instructions. Carrier’s referenced literature resource, for example, identifies a rating plate on the back of its outdoor units near the service connections. Do not reach into equipment, disturb wiring or disconnect refrigerant connections to read a plate.
Compare the complete model with official literature before relying on a manual. A nearby capacity, similar-looking cabinet or familiar brand name is not proof that a document applies. The current coverage panel below is the authority for what UnitReveal can interpret today.
Current date and model-document coverage
Bryant · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Bryant-label residential R-22/Puron outdoor air conditioners and heat pumps only, using exactly WWYY, site E or X, then five numeric sequence digits. Initial service window is 2006–2025, a conservative boundary rather than a format introduction date. Other sites, lengths, refrigerants and layouts, furnaces, ductless, packaged/commercial, OEM/international and related brands are not inferred. Manufacturing week 01–53 is retained with year precision; no calendar month or day is calculated. Current-year and future codes stay unsupported. A date does not verify model identity, installation, warranty, condition or safety.
Bryant — residential air conditioner and heat pump serial nomenclature (opens in a new tab)Printed page 3 — Unit Identification / Serial Number Nomenclature; 09/19 edition · Reviewed 2026-11-05; review due 2027-02-03.
Carrier · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Carrier-label residential R-22/Puron outdoor air conditioners and heat pumps only, using exactly WWYY, site E or X, then five numeric sequence digits. Initial service window is 2006–2025, a conservative boundary rather than a format introduction date. Other sites, lengths, refrigerants and layouts, furnaces, ductless, packaged/commercial, OEM/international and related brands are not inferred. Manufacturing week 01–53 is retained with year precision; no calendar month or day is calculated. Current-year and future codes stay unsupported. A date does not verify model identity, installation, warranty, condition or safety.
Carrier — residential air conditioner and heat pump serial nomenclature (opens in a new tab)Printed page 2 — Unit Identification / Serial Number Nomenclature · Reviewed 2026-11-05; review due 2027-02-03.
Daikin · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Only the documented U.S. Daikin unitary ten-digit numeric YYMM system is covered within the conservative 2013–2026 service window. This is not a format-introduction date or global Daikin coverage. Ductless/mini-split, VRV, chillers/applied products, OEM, controls/accessories, international, letter-led and other layouts are excluded. Use the main unit’s serial, not a component number. Older and future dates or invalid months return no date. A date does not verify model identity, installation, warranty, condition or safety.
Daikin — unitary AC/heat-pump YYMM reference (opens in a new tab)Printed page 2 — When Does Warranty Coverage Begin? paragraph (3) · Reviewed 2026-11-04; review due 2027-02-02.
Goodman · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Only the documented Goodman ten-numeric-digit YYMM format is covered, within the conservative 2013–2026 service window. This window is not a manufacturer format-introduction date. Older years, letter-prefixed, OEM and nonmatching formats are unsupported. Future dates and invalid months return no date. No Amana, Daikin, Janitrol or water-heater brand inheritance is assumed. A date does not verify a model, capacity, installation date, warranty, condition or safety.
Goodman — manufacture date from YYMM (opens in a new tab)Printed page 2 — When Does Warranty Coverage Begin? paragraph (3) · Reviewed 2026-11-04; review due 2027-02-02.
Lennox · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Only the documented Lennox plant/year/month-letter layout with five or six numeric sequence digits is covered. Initial mapped years are 2019–2023 only; 2024 onward and earlier years remain unsupported in this batch. Month letters are A–H and J–M; I is not used. No characters, including O and 0, are silently substituted. Other layouts, OEM or international formats and related brands are not inferred. A date does not verify a model, capacity, installation date, warranty, condition or safety.
Lennox — full serial month-code diagram (opens in a new tab)Page 3 — Serial Numbering System; year/length table in parent manufacturer reference page 9 · Reviewed 2026-11-04; review due 2027-02-02.
Trane · Air Conditioner
No reviewed model document records are listed yet. A matching serial format may still return a date.
Manufacturer serial-format limits
Trane-label central heating/cooling units only. Initial service accepts nine-character letter-year 1980–2001, nine-character numeric-year 2002–2008, and ten-character numeric-year 2010–2029 with documented character restrictions; 2009 transition is excluded. Future and current-year fiscal-week codes return no date. Fiscal weeks 01–53 are retained as manufacturer week numbers with year precision, never converted to a month/day. Accessories, standalone coils/compressors, ductless, OEM/international/other layouts and related brands are not inferred. No model, installation, warranty, condition or safety verification.
Trane 2026 Residential & Light Commercial Product Handbook (opens in a new tab)PDF page 137, ACIN-3 — Equipment Date Identification, effective 1/1/26 · Reviewed 2026-11-04; review due 2027-02-02.
Guides and manufacturer references
The guides below explain the process and cite their manufacturer or government references. Reading a guide does not add support for an unreviewed serial format.
Reading your equipment
Model number vs serial number: what is the difference?
Know which number to copy for manuals, manufacture dates and manufacturer support.
Reviewed
Read guideRecalls and documents
How to find the correct official equipment manual
Find manufacturer literature and check its model coverage before relying on it.
Reviewed
Read guideDates and decoding
What an equipment serial number can and cannot tell you
Separate a documented production-date interpretation from model verification, condition and recall status.
Reviewed
Read guideUse safely accessible labels or existing records. Do not remove panels, disturb connections or open hazardous equipment to complete a lookup.
Something here look wrong? Tell us about it.