Day & Night Serial Number Lookup

Day & Night had two corporate lives, first as a Carrier BDP brand and later as an ICP brand, and its serials follow both families' layouts. Carrier-era: digits 1-2 = week, digits 3-4 = year (4006A17330 = week 40 of 2006). ICP-era: year first, then week. No single source documents which layout modern units carry, so enter the serial above and the decoder runs both rules, showing every reading that passes the validity checks, ranked.

Day & Night is part of the ICP family, alongside Airquest, Arcoaire, Comfortmaker, Heil, ICP, KeepRite, and Tempstar. These brands come off shared production lines with the same data plates, so this page's other serial number formats apply across the family; the Carrier family week-year (WWYY + plant letter) format applies, among these brands, only to Day & Night; the Carrier family 1980s all-numeric (YYMM) format applies, among these brands, only to Day & Night. The refrigerant timeline above is stated for the whole family, not per brand. The warranty section above is this brand's own.

Carrier family week-year (WWYY + plant letter): Checked against 10 serials whose date a recall notice published by someone other than us states (CPSC recall notice 18-731, CPSC recall notice 02-227), 8 of them 7,000 BTU window air conditioner, model 77ZFA007101, across 2 equipment types. The date this tool reads first was consistent with the published window on all 10. Also read against 88 serials where a public body's own equipment schedule prints a year beside the serial (Norcross, Georgia; Salem, New Hampshire; Winter Park, Florida; Wayne Township, New Jersey; the year sits under a column headed Year on 63, in a row labelled Year Manufactured on 18, and on a line labelled YEAR on 7, 70 of which the document does not define), 70 name an equipment type, 28 of them condensing unit, across 10 equipment types: 87 matched the reading shown first, 1 did not match any reading (the published year ran earlier than this tool's reading). This format was also read against 1 serial on a chiller (Winter Park, Florida): 1 matched the reading shown first. It is shown for the record and not counted toward this format's check, because the equipment is not a heating or cooling unit.

ICP letter + year-week (L + YYWW): Read against 21 serials where a public body's own equipment schedule prints a year beside the serial (Salem, New Hampshire; Mobile, Alabama; Myrtle Beach, South Carolina; Wayne Township, New Jersey; the year sits under a column headed Year on 15, under a column headed Year Manuf on 4, on a line labelled YEAR on 1, and in a row labelled Year Manufactured on 1, 16 of which the document does not define), 5 name an equipment type, 2 of them condenser, across 4 equipment types: 18 matched the reading shown first, 3 did not match any reading (the published year ran earlier than this tool's reading on all 3).

No serial with a date published outside this tool has produced a reading through the ICP year-week + letter (YYWW + letter) and Carrier family 1980s all-numeric (YYMM) formats yet. No document from the company that built the unit is held for them, so those rules rest on the secondary references this tool records.

Across the Day & Night formats on this page, 6 serials with a date published outside this tool produced no reading at all (Norcross, Georgia; Salem, New Hampshire; Myrtle Beach, South Carolina). A serial this tool reads nothing from is neither an agreement nor a disagreement, so it is counted in neither.

Where someone outside this tool wrote down a different year for a unit, that year is shown here rather than dropped. It is that publisher's record for the unit, and a schedule or a listing can carry a replacement, system or lot year rather than the build year. The MFG DATE on the unit's data plate is the build date.

By manufacture year: through 2005: R-22; 2006 to 2009: R-22 or R-410A; 2010 to 2024: R-410A; 2025 and later: R-454B. The refrigerant printed on the nameplate is authoritative; the year-based mapping tells you what is typical for the age, not what is in a specific unit.

The maker's own page: Day & Night's product registration page (run by ICP, which makes Day & Night), at productregistration2.icpusa.com. The page reads: "Register all of your new ICP equipment." This page reads no maker's records and cannot show whether a unit was registered. What this page works out is the next question. Enter the serial in the lookup on this page and the result works out the parts term the Day & Night warranty certificates held here print for that build date, naming the edition and quoting its clause, or says plainly why it cannot and what would answer it. It asks only for answers that would change a line it shows, each naming the line it moves, and a Service Brief carries the result to whoever works on the unit. One U.S. Consumer Product Safety Commission recall notice this tool matches names Day & Night equipment. Where the serial and model entered meet, or may meet, a notice's printed conditions, the result shows that notice first, with CPSC's own hazard and remedy, and compares each condition; where a notice lists models and none was entered, it asks for the model, unless something else entered or read from the serial rules the unit out of that notice. It never says a unit is or is not recalled, and it says nothing when nothing entered meets or may meet one.

12 ICP air conditioner and heat pump warranty certificate editions covering Day & Night are held here, from 401 06 4300 04 (May 2010) to ACHP-ICP-08WAR (02/26). Every one prints a base parts term of 5 years for its residential row. Each gives 10 years if registered within 90 days (401 06 4300 04 to ACHP-ICP-08WAR). They start the term at installation, or at a date counted from manufacture when installation cannot be shown. Some of them tie their registered term to the original owner; ACHP-ICP-05WAR (6/24) prints: "If properly registered within ninety (90) days after original installation, parts are warranted for a period of ten (10) years to the original purchaser". It also prints: "In Texas and other jurisdictions where applicable, the subsequent owner's warranty duration shall match that of original owner (10 or 5 years, based on registration), as described in applicable law." Every one prints a separate term for a later owner, in a Subsequent Owners column; the result reads it when the owner is stated. None pays for labour. Enter the serial above: where held editions are dated both before and after the build and agree, the result works out the base parts term from the build date and the dated windows, each with the edition it rests on; where not, it says so and names what would answer it. Only the maker's records show whether a unit was registered.

Day & Night had two corporate lives: a Carrier BDP brand, then an ICP brand. This tool holds no source that settles which layout modern units carry, so this tool runs both decoders and shows every reading that passes the week/month validity checks. This matches the 1960-1979 Bryant/Carrier style (week digits + a year letter). This tool holds one source for the year-letter chart, so this tool does not decode it. A serial beginning with Z matches an older ICP style. ICP's own date code letter, which this tool holds, prints its layouts with other leading characters and none beginning with Z, so this tool reads no date from this style. If the data plate has an MFG DATE field, that is the reliable source.

No maker document held here dates Day & Night furnaces, so the tool does not call a date a Day & Night furnace's age; it reads the serial by the same rule it uses for Day & Night's other equipment.