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ICP family

How old is my Tempstar equipment?

Enter the serial number from the label. The date comes from Tempstar'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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Tempstar is an ICP brand, and several of the plates that confirm the ICP serial layout are Tempstar units. The newest, a Tempstar furnace with serial A154116798, prints DATE OF MANUFACTURE OCT 2015; its serial reads year 15, week 41. We haven’t found a dated ICP-family example newer than that, so later Tempstar serials are assumed to follow the same layout.

By equipment type

Questions

My Tempstar serial is four digits, a letter, then five digits. Why isn’t it decoded?
The one inspector reference that describes it contradicts itself: it reads a Tempstar sample, 9414B39332, as year then week, but reads the identical shape on Arcoaire and AirQuest as week then year. With no dated plate to settle it, we leave it undecoded rather than risk a wrong date.
Does an N at the start of the model number mean Tempstar?
No. A Tempstar product data sheet says “N = Tempstar”, but an ICP Commercial spec sheet for the same kind of unit says “N = ICP Commercial”, and N-series models are listed on every ICP brand site. Some models, such as the T5H8T, appeared only on Tempstar’s site when we checked.
Can you date an older all-digit or letter-coded Tempstar serial?
Not yet. One inspector reference describes older Tempstar and KeepRite styles: an eight-digit serial and several year-letter formats. No second source confirms them, and the eight-digit style can’t tell the 1980s from the 1990s, so we don’t decode them.
How do I find the age of my Tempstar equipment?
Enter the serial number from the rating plate above. Tempstar uses the ICP family serial format, which includes the manufacture date.

Heil, Comfortmaker, Arcoaire, KeepRite, AirQuest, International Comfort Products

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.