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Official Maratherm warranty & serial services

Read the plate. Check the evidence.

Maratherm Serial Number Lookup & HVAC Warranty Guide

Identify Maratherm equipment using the full nameplate model and serial, then use ICP registration resources and model documentation.

Browse Maratherm manuals and guides →
Find the serial or date-code label ↓

Identification research

What’s on the rating plate?

Central air conditioners, heat pumps, furnaces 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:

Read the label on your product

Where to find the numbers.

Use the label on the main unit, not a separate component, accessory or shipping barcode.

Maratherm central HVAC

Look for
Model and Serial Number
Label location
Read the unit data/rating plate beside its complete model; collect outdoor and indoor component plates separately.
Format / what to enter
Several OEM/era formats may occur.

Use the printed MFG DATE when present; do not infer capacity or refrigerant from a serial prefix.

ICP Maratherm2008 introduction: R4A3 air conditioners and R4H3 heat pumps ↗

Scope matters

Supported formats
and historical limits.

  • Maratherm is documented in ICP product literature, but that relationship does not verify every historical and current serial format.
  • No universal primary-backed Maratherm date algorithm was verified; a separately printed manufacturing date takes priority.

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

Source references

Reading your result

Maratherm 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.