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Trane family

How old is my Trane heat pump?

Enter the serial number from the label. The date comes from Trane's documented serial rules, not a guess.

Look for “Serial No.” or “S/N” on the label. Spaces and dashes are fine.

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How to read a Trane heat pump serial number

Trane and American Standard have used three date formats. From 1983 to 2001 the serial starts with a year letter; from 2002 to 2009 with a single year digit; since 2010 with a two-digit year. The production week always follows.

  • Year letter + week (1983–2001)

    Example: R1742DWBF (Trane) was made in April 2000. From 1983 to 2001, Trane and American Standard serials start with a year letter ("R" = 2000) followed by the two-digit production week (17).

  • 1-digit year + week (2002–2009)

    Example: 91531S41F (Trane) was made in April 2009. From 2002 to 2009, the first digit is the year ("9" = 2009) and the next two are the production week (15).

  • 2-digit year + week (2010 onward)

    Example: 17103N6MF4 (Trane) was made in March 2017. Since 2010, the first two digits are the year (2017) and the next two are the production week (10).

Not decoded yet: Pre-1983 Trane and American Standard formats are not decoded. Many plates print a MFR DATE, which is authoritative.

Where to find the serial number

The rating plate is on the outdoor unit, usually on the side or back of the cabinet near the electrical disconnect.

The indoor air handler has its own plate and its own serial number, so check which unit you're decoding.

Trane heat pump model numbers

If the brand name isn't visible on the label, the model number can help. Model numbers like these follow the Trane / American Standard nomenclature:

How long does a heat pump last?

A typical heat pump lasts about 10–15 years. That's a general estimate: maintenance, usage, climate and installation all matter, and age alone doesn't tell you a unit's condition.

Range from InterNACHI: standard estimated life expectancy chart, Carrier: how long do heat pumps last? and Lennox: how long do heat pumps last?.

Trane heat pump recalls

From the U.S. Consumer Product Safety Commission, checked 2026-09-29. A decoded result checks your model number against recalls live.

Questions

How can I tell how old my Trane heat pump is?
Find the serial number on the rating plate and enter it above. Trane heat pumps use the Trane family serial format, which includes the manufacture date. For example, R1742DWBF was made in April 2000: From 1983 to 2001, Trane and American Standard serials start with a year letter ("R" = 2000) followed by the two-digit production week (17).
Where is the serial number on a Trane heat pump?
The rating plate is on the outdoor unit, usually on the side or back of the cabinet near the electrical disconnect. The indoor air handler has its own plate and its own serial number, so check which unit you're decoding.
How long does a heat pump usually last?
A typical service life is about 10–15 years. That's a general estimate: maintenance, usage, climate and installation all matter, and age alone doesn't tell you a unit's condition.
Do American Standard heat pumps use the same serial format?
Yes. Trane and American Standard use the same serial-number conventions (Trane family), so the same decoding rules apply.
How reliable is the result?
The Trane family rules come from documented sources, but they're in Beta while we check more real-world examples, so results are capped at medium confidence. If a serial doesn't match a documented format, we say so instead of guessing.

Same serial format: American Standard heat pump

Other Trane equipment: furnace, air conditioner

Sources

Rules last reviewed 2026-09-28. These rules are in Beta while we verify more real-world examples, so results are capped at medium confidence.

Manufacture dates are decoded from manufacturer serial-number conventions and available documentation. Serial formats can change. Verify critical equipment information with the manufacturer when necessary.