HVAC & Refrigeration Serial Number Age Decoder

Decode the manufacture date and unit age from the equipment data plate. Runs pure client-side verification based on verified manufacturer service bulletins and nameplate standards.

Equipment Manufacturer / BrandRule: First 4 digits: YYMM (year and month)

Serial Number

Spaces and hyphens are automatically stripped.

DECODED MANUFACTURE DATE

BUILD DATE

June 2009

ESTIMATED UNIT AGE

17 years, 5 months old

As of today

How Scotsman serial numbers are read:

First 4 digits indicate year (first 2 digits) and month (next 2 digits) of manufacture.

Manufacturer Serial Decoding Guide

Each HVAC and refrigeration manufacturer encodes build dates differently. Below are the verified rules and sample serial numbers used by this tool:

Manufacturer	Category	Date Encoding Rule
Scotsman	Refrigeration & Ice	First 4 digits: YYMM (year and month)
Copeland	Refrigeration & Ice	Digits 1–2: Year, Character 3: Month letter (A=Jan…L=Dec)
Carrier / Bryant	HVAC	Digits 1–2: Week, Digits 3–4: Year
Lennox	HVAC	Digits 3–4: Year, Character 5: Month letter (A=Jan…M=Dec, skipping I)
Goodman / Amana	HVAC	Digits 1–2: Year, Digits 3–4: Month
Rheem / Ruud	HVAC	Digits indicate week (01–52) followed by 2-digit year
York / Johnson Controls	HVAC	2nd and 4th digits indicate year; 3rd character indicates month
Daikin	HVAC	Digits indicate year (YY) and month (MM)

Where to find the serial number on equipment

Outdoor AC & Heat Pump Condensers: Metal data plate near the refrigerant service valves or electrical disconnect access cover.
Gas Furnaces & Air Handlers: Inside the upper or lower cabinet door, or adhered to the blower housing frame.
Commercial Ice Machines: Rear exterior cabinet, or behind the removable front cover panel near the electrical control box.
Walk-in & Reach-in Refrigeration: Interior cabinet wall (left side) or stamped onto the compressor body nameplate.