HVAC Serial Number Lookup
Bosch Serial Number Lookup: AC and Furnace Age
Bosch's serial format is read from a document published by the company that built the unit. 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.
Every serial format on this page is read from a document published by the company that built the unit, held as a retained copy. The manufacturer's document "Serial Number Locations Reference Guide", which says the date code "is typically represented by the three digits in the serial number that immediately follow the first four characters". A date stamped or printed on the data plate always outranks a serial decode.
Bosch furnace not heating?
Its stop checks come first, then what its light or code means, on furnace codes for Bosch. Type what the furnace shows and it opens there with the brand filled in.
Bosch Serial Number Formats
| Format | Era | Example | Confidence |
|---|---|---|---|
| First 4 characters, then a 3-character date code (year digit, then a month code whose band gives the decade), then the rest; 22 to 24 characters ignoring dashesA manufacturer document, held as a retained copy. No secondary reference is relied on. The manufacturer's document "Serial Number Locations Reference Guide", which says the date code "is typically represented by the three digits in the serial number that immediately follow the first four characters". | 2010 to 2030 | 2940-455-00015-7735003001 = July 2014 | high |
Some older or conflicting Bosch formats are recognized but deliberately not decoded; the decoder explains why when it sees one instead of guessing.
Worked Example: Bosch 2940-455-00015-7735003001
Expected decode: July 2014. Character by character:
455 (the three characters after the first four) is Bosch's date code: July 2014 in Bosch's own Date Code Table
4 = last digit of the year; 55 = the month code for July, and the range the code falls in fixes the decade
Bosch Refrigerant Timeline
| Manufacture year | Typical refrigerant | Notes |
|---|---|---|
| through 2024 | R-410A | The Bosch IDS heat pump family launched on R-410A (2017-2024); Climate 5000 mini splits likewise. |
| 2025 and later | R-454B | The full IDS family (Light/Plus/Premium/Ultra) and Climate 5000 relaunched on R-454B 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.
Bosch Warranty Terms
Bosch warranty lookup
No page of Bosch'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 Bosch 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 Bosch's warranty
This tool holds no Bosch warranty certificate; check the terms with Bosch for your model.
The result does not work out a dated term for Bosch: no Bosch certificate is registered for that here. Only the maker's records show whether a unit was registered.
Source: no Bosch warranty document held.
Frequently Asked Questions
How old is my Bosch unit?
Decode the serial number from the data plate. The dominant Bosch format (2010 to 2030) is: First 4 characters, then a 3-character date code (year digit, then a month code whose band gives the decade), then the rest; 22 to 24 characters ignoring dashes. Example: 2940-455-00015-7735003001 decodes to July 2014. Subtract the decoded year from the current year for the age.
Has the Bosch serial decode been checked against serials somebody else dated?
No serial with a date published outside this tool has produced a reading through the Bosch 2010 to 2030 (date code after the first four characters) format yet. That format is read from a document published by the company that built the unit.
Where the data plate prints a production date, that date has the final say.
What refrigerant does a Bosch unit use?
By manufacture year: through 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.
How do I look up my Bosch warranty?
No page of Bosch'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 Bosch 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 Bosch unit still under warranty?
This tool holds no Bosch warranty certificate; check the terms with Bosch for your model. The result does not work out a dated term for Bosch: no Bosch certificate is registered for that here. Only the maker's records show whether a unit was registered.
Why do some Bosch serial numbers refuse to decode?
Bosch plates usually carry an FD number or printed production date; prefer that over the serial decode. An all-numeric Bosch serial shorter than the layout Bosch's own date code table reads (a date code after the first four characters) gets no date here. Use the FD number or production date printed on the plate.
How old is my Bosch furnace?
Bosch's own Serial Number Locations Reference Guide names "Gas Furnaces" on its cover and gives them their own section. Enter the furnace's serial above: the result gives the date and age and says which document covers it.
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