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Manuals+

Official First Co warranty & serial services

Read the plate. Check the evidence.

First Co HVAC serial number identification

Identify the product, actual maker and separate model number on the label. This page provides source-linked identification guidance and next steps; automatic manufacture-date decoding is not yet verified.

Browse First Co manuals and guides →

Identification research

What’s on the rating plate?

First Co air handlers, fan coils and packaged HVAC.

Automatic decoding is not yet verified.

This page provides researched identification guidance. It does not invent a date or model from an unsupported number.

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.

  • Pending decoder: secondary sites conflict on cycle length and date placement. The official WCX manual prints a one-letter/two-number/one-letter/six-number form without a year table.
  • Use full serial plus model with manufacturer support. New numeric styles and historical split-line serials remain unresolved.

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

Source references

Reading your result

First Co 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.