Electrolux appliances primarily use a serial format where the 3rd through 5th characters represent the year and week of manufacture. For example, a serial starting with 4D729 indicates a unit built in the 29th week of 2017 (or 2007). Unique to Electrolux dryers, a secondary, physical date stamp is often found in the back upper-right corner of the cabinet frame, providing a fail-safe verification of the appliance's true age.
The YYWW Serial Format
Most modern Electrolux appliances follow a 10-digit numeric or alphanumeric scheme.
Example: 4D72904857
- Position 1-2: Manufacturing plant code (e.g., 4D).
- Position 3: Last digit of the year (7 = 2007, 2017, or 2027).
- Position 4-5: Week of the year (29 = July).
- Position 6-10: Sequence number.
Hidden Physical Date Stamps
If the rating plate is illegible or missing, Electrolux has provided a "forensic" fallback. On the majority of Electrolux-built dryers, a 3-character date code is stamped directly into the metal of the back cabinet.
Location: Upper-right corner of the rear panel, viewed from the back.
Format: Typically a letter for the month followed by two digits for the year, or a direct YYWW stamp. This is invaluable for insurance adjusters and forensic engineers.
Electrolux vs. Frigidaire
Electrolux acquired the Frigidaire brand family (via White Consolidated Industries) in 1986. While the two brands share many internal components, the **Electrolux** label is positioned as the premium, European-influenced line, while **Frigidaire** is the value-oriented, North American heritage brand. Their serial formats are similar but not identical; see our Frigidaire Decoder for comparison.
Dryer Safety & Longevity
A notable data point for Electrolux dryers is the *Diehl v. Electrolux* class-action lawsuit, which covered units built between 2002 and 2011. The case focused on lint accumulation and fire risk. If you are dating an Electrolux dryer from this era, a thorough vent and internal cleaning is mandatory for safety. For more on dryer safety, see our Dryer Fire Prevention guide.