HVAC Serial Number Lookup
MrCool Serial Number Lookup
MrCool is part of the MrCool. 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.
Decode schemes compiled from manufacturer literature and inspector references, cross-checked across two sources wherever possible (MrCool sources: building-center.org, corroborated by the identical Gree week/year rule). Single-sourced rules are labeled low confidence instead of being presented as fact. A date stamped or printed on the data plate always outranks a serial decode.
MrCool Serial Number Formats
| Format | Era | Example | Confidence |
|---|---|---|---|
| Digits 1-2 = week, digits 3-4 = year, then a letter and 5 digits | Gree-built era | 1920K08283 = week 19 of 2020 | medium |
Some older or conflicting MrCool formats are recognized but deliberately not decoded; the decoder explains why when it sees one instead of guessing.
Worked Example: MrCool 1920K08283
Expected decode: week 19 of 2020. Character by character:
19 = week 19 (digits 1-2)
20 = year 2020 (digits 3-4)
MrCool Refrigerant Timeline
| Manufacture year | Typical refrigerant | Notes |
|---|---|---|
| through 2024 | R-410A | MrCool DIY and Universal lines ran R-410A through 2024. |
| 2025 and later | R-454B | MrCool explicitly chose R-454B (not R-32) for current and upcoming products. |
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.
MrCool Warranty Baseline
DIY series baseline: 5-year parts / 7-year compressor. The limited lifetime compressor term (original owner) requires registration plus documented twice-yearly maintenance with MrCool cleaning kits.
Source: mrcool.com warranty pages. Decode the manufacture date above, then confirm coverage through the manufacturer's own serial-number warranty lookup.
Frequently Asked Questions
How old is my MrCool unit?
Decode the serial number from the data plate. The dominant MrCool format (Gree-built era) is: Digits 1-2 = week, digits 3-4 = year, then a letter and 5 digits. Example: 1920K08283 decodes to week 19 of 2020. Subtract the decoded year from the current year for the age. Units past 15 years are replacement candidates, and past 20 a major repair rarely pays off.
Why can a MrCool serial number decode to more than one date?
The main MrCool rule carries medium confidence, so treat the result as an estimate to check against the data plate. Some serial formats are genuinely ambiguous. Every reading that passes the validity checks (weeks capped at 53, months at 12, no future years) is shown ranked, instead of a coin flip presented as a fact.
What refrigerant does a MrCool 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.
Is my MrCool unit still under warranty?
DIY series baseline: 5-year parts / 7-year compressor. The limited lifetime compressor term (original owner) requires registration plus documented twice-yearly maintenance with MrCool cleaning kits. Decode the manufacture date above, then confirm coverage by running the full serial through the manufacturer's own warranty lookup. Terms shown are the current policy; older units often carried different terms.
Why do some MrCool serial numbers refuse to decode?
MrCool 22-digit serials (Midea-built units) are documented only by a source that itself marks the data as believed accurate but not confirmed, and a conflicting reading exists for the same Midea format. Check the data plate or your MrCool account, which lists the registered unit's build date.
Related Tools
HVAC Serial Number Lookup (All Brands)
The full decoder: 50+ brands across every major manufacturer family, with ambiguous formats shown honestly.
Tonnage From Model Number
The serial tells you the age; the model number tells you the size. Decode BTU capacity and tons from the model.
A2L Refrigerant Charge Limit Calculator
Replacing an old unit with R-454B or R-32 equipment? Check the room-size charge limits per UL 60335-2-40.
Different brand on the data plate?
The full lookup covers 50+ brands across every major manufacturer family, with the same honest handling of ambiguous and undocumented formats.