The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Appliage is a free, no-signup lookup for the US and Canada that turns an appliance’s serial number into a manufacture date. It works only when you give it the exact brand as printed on the rating plate and the complete serial number. Even then, the result is not always a single year. Many manufacturers reuse the same date letters or digits on a fixed cycle, so the tool may return several candidate years, an estimate, or no date at all. Reading those labels correctly matters as much as getting the serial number right.
How to run a lookup
- Find the rating plate. Appliage points users to the metal or printed label around a door opening, on the back or side of the unit, or behind a removable access panel. If you cannot find it, the owner’s manual usually states the exact location for your model.
- Select the brand exactly as it appears on the plate. Brand names that look similar can belong to different product families with different date rules, so match the plate rather than the name you normally use.
- Copy the serial number character for character. Keep leading letters, zeros, spaces, and any revision suffix. Dropping a leading zero or a letter can move the code into a different rule or into no rule at all.
- Add the model number if you have it. The model number can separate repeated year codes and, on Kenmore and Sears products, identify the actual manufacturer behind the model prefix.
- Read the result label before you read the year. Keep any uncertainty the tool reports. A range of possible years is a correct answer for a repeating code, not a failed lookup.
Why one serial number can return several years
There is no universal serial-number format for home appliances. Appliage’s reference covers several families of codes, and each one encodes the date differently. Some use letters for month and year, some use two-digit year and month, some use a year-ending digit and a production week, and some use a separate date field. The table below summarizes the families described in Appliage’s reference material.
As an Amazon Associate I earn from qualifying purchases.
| Code family | How the date is encoded | Repeat cycle | What the model number helps with |
|---|---|---|---|
| GE, Café, Monogram | Two letters: month and year | Year letters repeat every 12 years | Choosing among candidate years |
| Whirlpool | Nine-character serial: factory code, year digit, production week | Year digit repeats every 10 years | Identifying which decade fits the model |
| Frigidaire, Electrolux family | Ten-character serial: maker/type, year-ending digit, production week | Year-ending digit repeats by decade | Deciding the decade when the digit alone is ambiguous |
| Bosch, Thermador, Gaggenau | Four-digit FD number giving year and month; E-Nr identifies the model and Z-Nr identifies the individual unit | Not stated in the reference | Confirming the model behind the FD date |
| Kenmore, Kenmore Elite, Sears | Model prefix identifies the actual manufacturer, whose serial rule then applies | Depends on the manufacturer’s rule | Required to choose the correct rule |
These are illustrations of the rule types, not a substitute for checking your brand, appliance type, country, and serial format. Manufacturers also revise their coding over time, so the manufacturer’s own documentation is the final reference when a result matters.
GE, Café, and Monogram: the 12-year cycle
GE Appliances’ support guidance for Café states that the first two letters of the serial number encode month and year, and that the year letters repeat every twelve years. Its published example, “GA,” can mean April 2001, April 2013, or April 2025. Monogram’s guidance gives the same warning for “GA,” listing April 2001 and April 2013, and recommends checking the owner’s manual or contacting the manufacturer when the year is still uncertain. GE’s guidance also makes the key practical point directly: to determine age, use the serial number rather than the model number to identify the date of manufacture.
#1 Best Overall
- Additional Tips - The following incorrect operations may cause the multimeter not to show results: Firstly, the plugs of test leads are not fully inserted or not inserted into the correct sockets. Secondly, the manual rotary switch is not placed in the correct position. In addition, this meter can not test all AC Current and below 100mV AC Voltage. Please check the user manual carefully before measurement.
- Versatile Digital Multimeter - Accurately measures AC/DC Voltage, DC Current, Resistance, and Diode. This Multimeter is a really useful tool for solving industrial and household electrical issues. Suitable for Household Outlets, Fuses, Batteries (including Vehicles), Automotive Circuit Troubleshooting, Charging Systems, Testing electronics in Cars etc.
- Troubleshooting with Accuracy - This Multimeter has a sampling speed of 2 times per second; Built-in a backlight LCD display with 3 ½ digits (1999 count) 0.6”, and high polarity including negative and positive readings.
- Ensures Safety - Double fuse is anti-burn and protects from overloading. The silicone cover can protect the multimeter from failing damage and prevent electric shocks. And low battery indication will be displayed when battery power is low.
- Ease of Use - Support Data Hold and Continuity Buzzer. Includes Convenient feature like LCD Backlit Screen makes it easy to use in dimly light areas. Batteries/Set of Test Leads/User Manual are Included.
Whirlpool and LG: the 10-year digit
Appliage describes modern Whirlpool serials as nine characters that combine a factory code, a year digit, and a production week. Because the year digit repeats every ten years, a single digit cannot tell a 2016 unit from a 2026 unit without another clue. The model number is the usual tiebreaker, since it can show which decade the model was actually sold in. LG’s year digits follow the same ten-year repetition, according to the same reference.
Frigidaire and Electrolux: week and year-ending digit
Appliage’s reference describes ten-character formats in this family, where specific positions encode the maker or product type, a year-ending digit, and a production week. The year digit alone leaves the decade open, so the model number may be needed to settle it.
Rank #2
- VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A DC current, 2MΩ resistance; additional features include continuity, diode test and battery test
- LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
- BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
- BATTERY TEST: Battery test mode can be used for checking if batteries are working
- CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
Bosch, Thermador, and Gaggenau: the FD date
Bosch-family appliances carry a separate four-digit FD number that encodes year and month. Do not confuse it with the other identifiers on the plate. The E-Nr identifies the model, and the Z-Nr identifies the individual unit. Use the FD number for the date, and use the E-Nr when you need to confirm which model you are looking at.
Kenmore and Sears: the model prefix decides the rule
Kenmore, Kenmore Elite, and Sears appliances were largely built by other manufacturers. The model prefix identifies the maker, and that maker’s serial rule is the one that applies. If you enter a Kenmore serial without the model number, the tool may not know which rule to use.
Rank #3
- Versatile Digital Multimeter - Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Temperature.
- Thoughtful Design - Support Data Hold, Large LCD Backlit Screen, Auto Shut-off and Kickstand make the process of measurements easier. Professional level is reflected in some features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage.
- Suitable For Many Occasions - This Multimeter is a golden partner to help to troubleshoot a variety of automotive and household electrical problems safely and accurately.
- Ensure Safety - Double ceramic fuse is anti-burn and protects from overloading，and it will be more secure and reliable； F400mA/600V and F10A/600V explosion-proof ceramic fuse tubes can protect the multimeter effectively.
- Additional Tips - Please take off the cap before using the test leads. Check the manual for more usage information.
Reading the result labels
Appliage uses four result types. Each one tells you how much weight to give the year shown.
- Confirmed: The date is supported by model and serial records for that appliance.
- Estimated: The tool has a likely reading from the code rule, but the date is not confirmed for the individual machine.
- Candidates or possible dates: The code repeats, and more than one year fits. Use the model number, or check the manufacturer, to narrow the list.
- No date: The tool cannot produce a date. Common causes are a serial and model that conflict, a brand or product family without a usable rule, or a serial that has been mistyped.
What the underlying records can and cannot show
Appliage says its model records come from manufacturer pages, catalogs, service documents, government energy records, and certification directories. These sources help establish when a model was available on the market. They do not give the build date of an individual machine. A model that was sold from 2014 to 2019 can still produce a serial from any year in that window, and the lookup works from the serial rule, not from the sales history.
Rank #4
- Accurately Test Full Features: Accurately measures AC/DC voltage, DC current, resistance, continuity test, diode and batteries.
- High Quality & Safety :Our multimeter is designed to safely and accurately troubleshoot a variety of automotive and household electrical problems. Overload Protection on all ranges to ensure long-term service life,Low Battery Indication, Audible continuity sensor checks that the circuit or wires conduct electricity. Double insulation with a good angled stand for hand free use.
- EASY TO USE: 2.7"Large Backlit LCD Display, Data Hold, Easy to Read Large Back-light Screen forvisibility in dimly light areas. Our mutimeter tester is widely used in Car repair, Homeuse, Schools, laboratories, Families and factories, suitable for Car Drivers, Beginners,Professional Electricians, Housewives, Students Use.
- Nice Protective Orange Shell with Stand Built: Our digital multimeter can be hand held or stood using its fold out stand. Removable thick rubber cover is made of kind of non-slip slightly soft plastic that will help with drop protection & minor bumps protection.
- 2 YEARS Quality Guarantee & Included 9V Battery: The compartment lid at the back is easy to remove. Battery/Set of Test Leads/User Manual are Included.They guarantee against faulty materials and workmanship for 2 years-giving you total peace of mind. If there is any issue within24 months of your purchase, we will replace it for vou with no doubt.
Appliage describes its coverage as 82 supported brands and 391,252 models on file, both as of 2026. These are figures the provider displays on its own site. They have not been independently audited, and this article does not treat them as a measure of accuracy.
How far back the lookup reaches
The reference material does not state an earliest manufacture year that Appliage covers. The practical limit is the code rule for your brand: if the manufacturer’s scheme predates the rule the tool uses, you will see “No date” or a wide range of candidates. For older equipment, the owner’s manual and the manufacturer’s support line are the reliable next steps.
Best Value
- VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A AC/DC current, 50MΩ resistance; additional features include continuity, temperature, capacitance, frequency/duty cycle and diode test
- LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
- BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
- ACCURATE MEASUREMENTS: Auto-ranging and True Root Mean Squared (TRMS) technology provides precise and accurate measurements
- CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
Using age in a repair-or-replace decision
An age lookup gives context, not a verdict. It can tell you whether a warranty period has likely ended, or how old a used appliance you are considering is. It cannot diagnose a fault, estimate the remaining life of a component, or price a repair. Appliage itself says age is only one part of a repair-or-replace decision, alongside the fault, the repair cost, and the condition of the unit.
How to compare any serial decoder
If you are choosing between decoders, or deciding whether to trust one result, check these points:
- Whether the brand and product family in the tool match the plate you are reading
- The date precision it returns: month, week, or year
- How it handles codes that repeat, and whether it lists candidate years
- Whether a model number can settle the decade or the maker
- How it labels confirmed dates compared with estimates
- Whether it returns an explicit “No date” result for unsupported or conflicting input rather than forcing a year
- Whether its rules trace back to manufacturer documentation
Appliage’s stated approach meets several of these checks: it labels uncertain cases and does not always force a single date. Its brand rules are presented as its own reference, so treat its coverage claims as the provider’s statements, and confirm any year that matters with the manufacturer.
Recommended Free Tools
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
