HVAC Serial Number Lookup
Friedrich Serial Number Lookup
Friedrich has its own serial number formats; the rows below say which are read from the manufacturer's own document. Enter the serial from the data plate below to get the manufacture date with a character-by-character explanation, the unit's age, its refrigerant era, and the warranty picture.
Starting the decoder. The serial formats, the refrigerant timeline and the warranty terms further down this page are already loaded, so you can read yours off them now.
7 of the 41 decode rules rest on a single secondary reference. Where two agree, that is weaker evidence than it looks: secondary references copy one another, and agreement between two is not a manufacturer document being read. Some of the formats on this page are read from the manufacturer's own document; the others rest on secondary references, and each row below says which. A date stamped or printed on the data plate always outranks a serial decode.
Friedrich Serial Number Formats
| Format | Era | Example | Confidence |
|---|---|---|---|
| 10 characters; digits 1-2 = the year, digits 3-4 = the month, character 5 = a factory or product-line letter this tool does not read, digits 6-10 = the production sequenceManufacturer documents, held as retained copies. No secondary reference is relied on. Character 5 is labelled differently across Friedrich's own manuals and is never read. | 2017 to present | 1712M00001 = December 2017 | high |
| 9 characters, four letters then 5 digits; letters 1-2 = the year pair, letter 3 = the month, letter 4 = the product line, digits 5-9 = the production runA manufacturer document, held as a retained copy. No secondary reference is relied on. The year pair and the month letter are decoded; the product-line letter is labelled and not enumerated, so it is not. | 2009 to 2017 | AKAM00001 = January 2010 | high |
| 2 digits + letter + 6 digits; digits 1-2 = year. Year only; the month letter is not decoded hereCross-checked across 2 secondary references, not a manufacturer document. Year only. | older units (~1990s) | 92J010915 = 1992 | medium |
Some older or conflicting Friedrich formats are recognized but deliberately not decoded; the decoder explains why when it sees one instead of guessing.
Worked Example: Friedrich 1712M00001
Expected decode: December 2017. Character by character:
17 = year 2017 (digits 1-2, Friedrich's own Serial Number Reference Guide)
12 = December (digits 3-4)
M at position 5 and 00001 at positions 6-10 carry no date. Friedrich labels position 5 differently across its own manuals, so this tool does not read it
Friedrich Refrigerant Timeline
| Manufacture year | Typical refrigerant | Notes |
|---|---|---|
| through 1995 | R-22 | R-22 was the standard refrigerant for equipment of this age. R-410A did not become an EPA-accepted substitute for HCFC-22 in household and light commercial air conditioning until February 8, 1996, so a unit built before then predates it. Standard refrigerant of the era. EPA ended U.S. production and import of R-22 on January 1, 2020; an existing system can still be serviced with recycled, reclaimed or previously produced R-22. |
| 1996 to 2024 | R-410A (older window units R-22) | Friedrich room, window, and PTAC lines ran R-410A in recent years; older window units were R-22. |
| 2025 and later | R-32 | Friedrich moved Chill Premier, Uni-Fit, Kuhl, and PDH PTAC lines to A2L-compliant R-32 for 2025. |
The refrigerant printed on the nameplate is authoritative; this timeline tells you what is typical for the age, not what is in a specific unit.
Friedrich Warranty Terms
Friedrich warranty lookup
No page of Friedrich's own for looking up a warranty is linked here, and this page does not read any maker's records, so it cannot show whether a unit was registered.
Enter the serial in the lookup on this page for the build date and the unit's age. No Friedrich warranty certificate is held here for a dated term, so the result dates no term, says so, and names what would answer it; a Service Brief carries what is known to whoever works on the unit.
What this tool holds on Friedrich's warranty
Friedrich's terms depend on the product line. This tool holds Friedrich's 2026 PTAC and VTAC certificate (99304401) but no room air conditioner certificate, so check the warranty sheet for your model line.
The result does not work out a dated term for Friedrich: no Friedrich certificate is registered for that here. Only the maker's records show whether a unit was registered.
Source: Friedrich PTAC and VTAC limited warranty 99304401 (2026).
Frequently Asked Questions
How old is my Friedrich unit?
Decode the serial number from the data plate. The dominant Friedrich format (2017 to present) is: 10 characters; digits 1-2 = the year, digits 3-4 = the month, character 5 = a factory or product-line letter this tool does not read, digits 6-10 = the production sequence. Example: 1712M00001 decodes to December 2017. Subtract the decoded year from the current year for the age.
Has the Friedrich serial decode been checked against serials somebody else dated?
Friedrich PTAC letter-led year pair: Read against 1 serial where a seller entered a year in the listing's own year field on a government surplus listing for the serial (government surplus auction listings), ZoneAire premier portable unit: 1 matched the reading shown first; a seller's year is shown here for the record and is not counted toward this format's check.
No serial with a date published outside this tool has produced a reading through the Friedrich year and month digits format yet. That format is read from a document published by the company that built the unit.
No serial with a date published outside this tool has produced a reading through the Friedrich leading 2-digit year format yet. No document from the company that built the unit is held for it, so the rule rests on the secondary references this tool records.
What refrigerant does a Friedrich unit use?
By manufacture year: through 1995: R-22; 1996 to 2024: R-410A (older window units R-22); 2025 and later: R-32. 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.
How do I look up my Friedrich warranty?
No page of Friedrich's own for looking up a warranty is linked here, and this page does not read any maker's records, so it cannot show whether a unit was registered. Enter the serial in the lookup on this page for the build date and the unit's age. No Friedrich warranty certificate is held here for a dated term, so the result dates no term, says so, and names what would answer it; a Service Brief carries what is known to whoever works on the unit.
Is my Friedrich unit still under warranty?
Friedrich's terms depend on the product line. This tool holds Friedrich's 2026 PTAC and VTAC certificate (99304401) but no room air conditioner certificate, so check the warranty sheet for your model line. The result does not work out a dated term for Friedrich: no Friedrich certificate is registered for that here. Only the maker's records show whether a unit was registered.
Why do some Friedrich serial numbers refuse to decode?
A ten-character Friedrich serial that begins with a letter is not a layout Friedrich prints in any of the service manuals this tool holds, so this tool reads no date from it. Read the date printed on the data plate, or contact Friedrich with the serial. Friedrich's PTAC Serial Number Identification Guide reads a letter-led serial as four printed groups: one of nine year pairs covering 2009 through 2017, one of twelve month letters (A through M, with I skipped), a product-line letter the chart names but does not enumerate, and a five-digit production run. This serial does not sit inside those groups, so this tool reads no date from it. Read the date printed on the data plate, or contact Friedrich with the serial. Friedrich's own Serial Number Reference Guide reads this ten-character layout as a year, a month, one character Friedrich labels differently across its own manuals, and a sequence, from 2017 onward up to the current year. The leading four digits here do not resolve to a month in that window, so this tool reads no date from them. If the unit is not a Friedrich, choose its brand instead; otherwise read the date printed on the data plate or contact Friedrich with the serial.
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