SerialAtlas
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HVAC date-code guide

Goodman serial number lookup

Goodman is a high-volume North American HVAC brand. Its widely used modern serial format places the two-digit year and month in the first four positions.

Parent
Daikin Comfort Technologies
Common code
The first two digits are the year and the next two digits are the month (YYMM).
Reviewed
August 8, 2026

Instant equipment lookup

Decode the manufacturing date

Runs on this device
Equipment type

Using The first two digits are the year and the next two digits are the month (YYMM).

Type exactly what is printed. Spaces and dashes are ignored.

Optional: add model number for capacity cluesAdd model

Model decoding is labeled as a clue unless the exact format is documented.

No signupNo uploadNo serial-number tracking

EQUIPMENT DATA
MODEL24ABC636A003
SERIAL5019X30312
WeekYear

See exactly how the code was read

SerialAtlas highlights the date characters, names the matching rule, and shows alternative interpretations when the code is ambiguous.

  • Current age calculated automatically
  • Confidence and rule source shown
  • Optional model-capacity clue

Evidence-led route update

Goodman date-code evidence

If you need to estimate a Goodman unit’s manufacture age, read the first four serial characters only after confirming the brand on the plate.

Keep Goodman YYMM separate from model-number clues

The first two digits are the year and the next two digits are the month (YYMM). The verified Goodman-family format is YYMM: the first two characters represent year and the next two month. Daikin ducted equipment in the catalog shares this family only where the product platform supports it. The verified Goodman family reads the first two serial digits as year and the next two as month. That front-loaded YYMM evidence is separate from model-number capacity or efficiency clues and should be read from the rating plate.

Worked example: 0809123456

0809123456 — The verified decoder reads this fixture as September 2008. The date is a manufacture estimate, not an installation date.

When a Goodman serial looks like a different platform

Older, imported, or product-specific equipment can use another date-code family. If the brand, platform, or label era does not fit the documented example, keep the result cautious and use Goodman or Daikin support.

Model number vs. serial number

Use the Goodman model number for product-family and configuration context; do not substitute a model substring for the serial date read. Keep the complete model number with the serial because Goodman support and parts identification are model-specific.

Limits and official support

Goodman-family imported and older products can use another date-code family. If the result affects warranty, registration, parts, safety, or replacement decisions, use the complete model and serial with the manufacturer or a qualified professional. SerialAtlas is an independent reference, not an official warranty lookup or warranty coverage decision.

Open Goodman support route

How to read a Goodman serial number

The first two digits are the year and the next two digits are the month (YYMM). SerialAtlas removes spacing and punctuation, then applies only the documented rule families mapped to Goodman. The lookup remains in the browser.

Try this documented-style example0809123456Load example

Equipment covered

  • air conditioners
  • heat pumps
  • furnaces
  • air handlers
  • packaged systems

Commercial, imported, very old, specialty, and private-label equipment can use a different code. Confirm the full rating plate before accepting a result.

Where to find the rating plate

  • Outdoor condenser or heat-pump cabinet, usually near the service valves
  • Inside the furnace or air-handler access panel
  • On the packaged-unit rating plate
  • Near the electrical disconnect or wiring diagram

Why more than one date can appear

Two-digit years and repeating letter cycles can point to more than one era. SerialAtlas ranks the plausible dates but keeps materially different alternatives visible. Label design, refrigerant, installation records, and product literature can resolve the era.

Source and verification

Inspector Handbook open reference data (CC BY 4.0). Independently implemented and reviewed August 8, 2026.

Open reference source

What this result does not prove

A manufacture date is not an installation date, warranty decision, recall match, condition assessment, or replacement recommendation. Confirm high-stakes decisions with the manufacturer or a qualified professional.