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Warranty Claim GuideIndependent guides

Start with the date code

How old is my appliance?

Independent guide. Not affiliated with or endorsed by any brand. Brand names are trademarks of their owners, used only to identify products.

Choose your brand to read the supported manufacture date code. A manufacture date does not establish warranty coverage.

Goodman

Modern HVAC codes; year only, month unclear.

Dated sources · November 2026Check the date code

Amana

Supported modern formats; identify a possible year.

Dated sources · November 2026Check the date code

Carrier

Modern numeric codes with a week and year.

Dated sources · November 2026Check the date code

Trane

Supported year/week codes; older formats stay unclear.

Dated sources · November 2026Check the date code

Rheem / Ruud

Numeric date codes; the century can remain unclear.

Dated sources · November 2026Check the date code

Bradford White

Letter codes with more than one possible year.

Dated sources · November 2026Check the date code

Before you start

Find the serial label

Use the product label and the manufacturer's format information. Do not remove covers to look for a label.

  1. 1. Find the label

    Look for the model and serial information on the appliance's label.

  2. 2. Read the serial prefix

    Use the characters requested by the brand guide. Keep the rest of the serial number private.

  3. 3. Confirm the format

    Match the format before reading a date. Other eras and exceptions can remain unclear.

Other brands and unsupported formats are not decoded here. Sources and publishing standards.