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Official Ducane warranty & serial services

Read the plate. Check the evidence.

Ducane Serial Number Lookup

Ducane-specific legacy numeric, oil-furnace and later Allied plant-year-month families.

Browse Ducane manuals and guides →

Check a documented system

What’s on the rating plate?

HVAC; oil-furnace suffix rule requires product confirmation.

Spaces and dashes are accepted. Check O/0 and I/1, and keep any leading zeros.

Checks ENERGY STAR model records and searches manuals separately from the serial. Certification records do not establish this unit’s manufacture date.

Known product context (optional)

Choose a system only when it matches the product family and its documentation. A purchase year or a manual’s publication date does not establish a manufacturing date.

Explore a sourced example:

Scope matters

Supported formats
and historical limits.

  • Manufacture date is distinct from installation, purchase and warranty start dates.
  • The date code does not identify a full model, capacity or configuration. Enter the separate model from the rating plate for manual search.
  • Do not apply Armstrong1978-1992 letter tables to Ducane merely because both are now Allied brands. Exact old-style introduction/changeover is not established.

Research reviewed October 16, 2026. This independent tool applies published rules and retains unresolved years and model candidates.

Source references

Ducane: plant, year and month letter

hvac

Allied Air manufacturer warranty guide p10 explicitly documents Ducane 1611J19567 and plant codes. Page9 says the shared plant-year-month format was used since January 1993.

Ducane legacy numeric serial: year/week suffix

hvac

Ducane old-style ten-numeric format: first six sequence, next two year, final two week. Manufacturer p10 example 0183290431 means 2004 week31 (its chart says August; do not convert to an exact calendar date). 1980 lower bound is a conservative historical supported-range limit; source does not state start/changeover.

Ducane oil furnaces before 1996: year/week suffix

hvac

Trane/AS handbook footnote explicitly documents HA1234569540 as 1995 week40 for Ducane oil furnaces before Jan1,1996. Do not apply this to all Ducane units.

Ducane oil furnace; confirm product type from rating plate

Reading your result

Ducane lookup questions

Why does the year code match more than one year?

Some systems reuse letters or only encode the last one or two year digits. Every supported interpretation is retained. A decade supplied from reliable records can narrow the reading; the tool does not automatically pick the newest year.

Does the serial identify my exact model?

Usually the model is a separate plate field. Where published serial ranges actually identify a model, the result shows model candidates and links to their manuals. Overlapping ranges remain ambiguous.

Can I share the result?

After a lookup, the address includes the serial in a fragment beginning with #serial=. Use “Copy share link” to share the serial and selected context. Opening the link runs the same lookup. The fragment is not a query-string result page.