Microwave lifespan by source
| Source | Lifespan | What it’s based on | Basis |
|---|---|---|---|
| NAHB / Bank of America study (2007) | 9 years | 2006 telephone survey of manufacturers, trade associations and researchers | industry study (NAHB) |
| InterNACHI life expectancy chart | 9 years | Home inspectors’ chart, assuming regular recommended maintenance and normal wear | industry study (InterNACHI) |
| Consumer Reports | About 10 years | How long most manufacturers tell CR their microwaves should last | industry study (Consumer Reports) |
| US Department of Energy (2023 rule) | 10.78 years average | Survival analysis of shipment data and federal household surveys (RECS and the American Housing Survey) | official (US DOE) |
| Appliance Magazine (2013), quoted by DOE | 8 years average (4 low, 12 high) | Magazine staff’s expert judgment, for use by the first owner | trade estimate (Appliance Magazine) |
| Fannie Mae useful-life tables (2019) | 8 to 12 years, depending on property type | Guide for assessing apartment buildings, not single-family homes | industry guideline (Fannie Mae) |
| Our single estimate | About 10 years | Median of the four household figures (NAHB 9, InterNACHI 9, Consumer Reports 10, DOE 10.78), which is 9.5, rounded to 10 | our estimate |
The four household figures sit between 9 and 11 years. NAHB lists microwave ovens among the shortest-lived appliances in a home, with dishwashers (9 years) and compactors (6).
Our estimate leaves out two rows. DOE says the basis of published estimates such as Appliance Magazine’s was uncertain, so it built its own from household survey data. Fannie Mae’s figures are for apartment buildings: 10 years for multifamily and co-op, 12 for seniors housing and 8 for student housing.
These are averages, not deadlines: NAHB notes that an appliance’s life depends largely on how much it is used.
Countertop vs over-the-range
None of these sources gives separate lifespans for countertop and over-the-range (OTR) models. DOE uses one average for every type of microwave oven it regulates. Consumer Reports gives about 10 years both in its care advice for OTR models and in its general buying guide.
The sources do show how the two types differ in cost and problems:
| Countertop | Over-the-range | |
|---|---|---|
| Installation | None. CR suggests an outlet used only by the microwave, or it might trip the breaker | Built into the cabinets and bolted to the wall; may need an electrician |
| Installing a replacement | Not needed | $100 to $200 for a simple swap; hundreds more if wiring, venting or cabinets need changes |
| Price in CR’s ratings | Small models from about $60; midsized from just under $100 to $500 | Some under $200; most CR has tested cost $400 or more |
| Owners reporting control-button problems | 3% | 6% |
Basis: Consumer Reports’ buying guide (May 2025), its OTR articles (2024) and its member survey of more than 74,000 microwaves bought new from 2015 to 2025 (October 2025). Prices are as of those dates.
In that survey, the most common complaints for both types were excessive noise, control buttons breaking and uneven heating.
How old is my microwave?
The build date, where a maker encodes one, is in the serial number on the model and serial label. The checker on this site doesn’t have a microwave type yet, so it can’t date a microwave for you. Here is what the makers’ US help pages say.
Where the label is
| Brand | Where the maker says to look | Basis |
|---|---|---|
| GE | Inside, on the left side wall; on the bottom of over-the-range models, usually near the back; or on the back | official (GE serial number locator) |
| Whirlpool, KitchenAid, Maytag, Amana | Over-the-range: on the front frame, with the door open. Built-in: under the control panel, along the oven vent, on the right-hand side | official (each brand’s Product Help page) |
| LG | Shown as a picture only: an over-the-range model with the door open and the label at the top of the oven opening | official (LG USA Support) |
| Samsung | We couldn’t find a current Samsung US page that says | none found |
The Whirlpool-family pages list no countertop spot. On a countertop model, check the back: GE lists it, and CPSC’s 2019 Kenmore Elite notice puts that model’s data plate there. GE model numbers always begin and end with a letter, which helps you tell the model from the serial.
Which date codes work on microwaves
- GE. GE’s chart (first letter = month, second letter = year) is written for GE appliances in general, not microwaves specifically. One GE microwave product fits it. GE’s recall page says its built-in micro-oven combos were made from January 1, 2000 to December 31, 2003, and lists the affected serials as any month letter followed by Z, A, D or F. On GE’s chart, Z, A, D and F can mean 2000, 2001, 2002 and 2003. See the GE serial number guide.
- Samsung. CPSC’s 2009 recall of SMH9151 over-the-range microwaves says units produced from January through May 2009 have serials from xxxxxxxS1xxxxxx to xxxxxxxS5xxxxxx. That puts the year (S = 2009) and the month in the 8th and 9th characters, as our Samsung serial number guide reads them.
- LG. LG’s US help page gives one serial rule for its products, on the same page that covers microwaves: the first digit is the year and the next two are the month. The year digit repeats every 10 years; our LG serial number guide shows how to settle the decade.
- Whirlpool, KitchenAid, Maytag, Amana. We found no date decoder published by Whirlpool. The table in our Whirlpool serial number guide comes from an independent reference, and we found no source showing that it holds for microwaves, so treat any date you read as unconfirmed.
- Kenmore. Other companies built Kenmore microwaves. Appliance411’s list of Kenmore model prefixes includes 721 for LG, 401 for Samsung and 204 for Galanz. For a Galanz-built Kenmore Elite model (204.77603610), CPSC’s 2019 notice says the first six digits of the recalled units’ serials, 170427, show their build date, April 27, 2017. See the Kenmore serial number guide.
Repair or replace?
Don’t open a microwave yourself. The US Consumer Product Safety Commission (CPSC) warns against do-it-yourself microwave repairs. Microwaves use high voltage, and CPSC says a shock is still possible even after the oven is disconnected from power. Consumer Reports adds that the capacitors can hold a charge of thousands of volts for hours or even days after unplugging. CPSC reports an average of two electrocution deaths a year from 2006 through 2008 among consumers trying to repair microwave ovens. It strongly recommends having professionals do repairs, so hire a qualified technician.
What the published guidance says:
- Over-the-range models. Consumer Reports’ survey analysis says a broken OTR microwave that cost $300 or less should be repaired if it’s 1 to 3 years old and considered for repair at 4 to 6. The answer changes if you paid more, CR says. A replacement adds $100 to $200 for installation, or more if electrical, venting or cabinet changes are needed.
- Countertop models. We found no published rule. Consumer Reports notes that electronics repairs are expensive and replacing may cost less, so get an estimate first.
- Warranty. Most manufacturers offer a one-year warranty, CR says, and nearly half of the OTR models its members had professionally repaired were covered by one.
- Faults to act on. CR says a door that won’t shut or a broken control panel needs a repair. FDA says not to use a microwave whose door doesn’t close firmly or is bent, warped or otherwise damaged, or one that keeps running with the door open.
- Avoiding repairs. Consumer Reports’ advice: keep it clean, including the grease filters underneath an OTR model; don’t run it empty; put only food and microwave-safe dishes inside; and don’t slam the door, because the latches have to line up for it to work.
Recalls
Enter the model number in the recall check above and choose “Microwave” (or leave “Any”). Then confirm on CPSC.gov and in the notice itself, since several notices cover only certain serial numbers.
As of 6 October 2026, the newest microwave oven recall we found in CPSC’s database is from November 2019. These are examples, not a complete list:
| Recall date | Product | Hazard | Units | Remedy offered |
|---|---|---|---|---|
| Nov 14, 2019 | Kenmore Elite countertop convection microwave, model 204.77603610, built April 27, 2017 | Incorrect wiring can make the outside hotter than 183°F (burn) | About 700 | Free in-home repair |
| Aug 25, 2016 | Whirlpool microwave hood combinations (models starting WMH53520C or WMH73521C, serials TR33500000 to TR34899999) | Arcing inside can ignite a plastic part (fire) | About 15,200 | Free replacement |
| Nov 5, 2009 | Samsung over-the-range microwaves (SMH9151 models) | Shock, if an installation bolt touches an electrical part inside and the outlet isn’t grounded | About 43,000 | Free repair |
| Dec 5, 2007 | GE, GE Profile and Kenmore built-in microwave and wall oven combinations | The microwave’s door switch can overheat and ignite plastic parts (fire) | About 92,000 | Free repair, or a rebate toward a new unit |
| Oct 16, 2001 | Whirlpool, KitchenAid and Kenmore over-the-range microwave-hood combinations with serials beginning XC | Can overheat and catch fire | About 1.8 million | Free repair |
Basis: official (CPSC notices, listed in the sources).
The recall check can’t match the 2001 Whirlpool recall by model number, because CPSC’s data identifies it by serial number. Check that one against the table. Selling? Our recall check page explains the law on recalled products.
Buying a used microwave
- Find the age using the notes above. A 6-year-old microwave is about 4 years short of our 10-year estimate. That’s subtraction, not a prediction.
- Check the door. Make sure it closes firmly and isn’t bent, warped or damaged, as FDA advises.
- Run the recall check, and on an OTR model budget $100 to $200 for installation, according to Consumer Reports.
Limitations
- Lifespan figures are averages. They can’t tell you how one microwave was used or treated.
- No source we found splits microwave lifespans by type or by brand, and we don’t rank brands.
- Consumer Reports’ repair-or-replace guidance covers over-the-range models only.
- Our checker can’t date microwaves yet, and our repair or replace calculator doesn’t cover them.
What to do next
- Check for recalls: the recall check above, then CPSC.gov
- Can’t find the label? Appliance model number lookup
- Read a serial: GE, Samsung, LG, Whirlpool and Kenmore
- Other kitchen appliances: how long stoves last and how long dishwashers last
Checked against the sources below on 6 October 2026.
