Product warranties work on two tracks at once: if the manufacturer chose to put a written warranty in the box, federal law controls what it must say and do, and separately, almost every sale of goods carries automatic implied warranties under state law whether anyone wrote anything down or not. Knowing which track you’re on — and what each one actually promises — is the difference between accepting a “sorry, not covered” and getting the repair, replacement, or refund you’re owed.
The Two Kinds of Warranty That Cover You
The first track is the written warranty. Nothing in federal law forces a manufacturer to offer one. But when a company does offer a written warranty on a consumer product costing more than $10, the Magnuson-Moss Warranty Act (15 U.S.C. §§ 2301–2312) requires the terms to be fully and conspicuously disclosed in plain language.1Federal Trade Commission. Magnuson Moss Warranty-Federal Trade Commission Improvements Act2eCFR. 16 CFR Part 700 – Interpretations of Magnuson-Moss Warranty Act The warranty has to spell out who is covered, what parts are included, what the company will do about a defect, what costs fall on you, how to make a claim, and what is excluded.3Office of the Law Revision Counsel. 15 USC 2302 – Rules Governing Contents of Warranties
The second track runs underneath every sale by a merchant, silently. The Uniform Commercial Code, adopted in some form in every state, creates two implied warranties that attach automatically.
The implied warranty of merchantability is the big one. When a merchant sells goods of a type they normally deal in, the law implies a promise that those goods are fit for their ordinary purpose. A blender that won’t blend, boots that fall apart in light rain, a battery that won’t hold a charge — each fails the merchantability standard.4Legal Information Institute. Uniform Commercial Code 2-314 – Implied Warranty: Merchantability; Usage of Trade
The implied warranty of fitness for a particular purpose is narrower. It applies when the seller knows you need goods for a specific use and you’re relying on the seller’s expertise to pick the right product. If a salesperson recommends a specific paint for outdoor marine use and it peels within weeks, that warranty is breached regardless of what the can says.5Legal Information Institute. Uniform Commercial Code 2-315 – Implied Warranty: Fitness for Particular Purpose
Sellers can try to disclaim implied warranties with “as is” or “with all faults” language under the UCC. Here’s the crucial federal override: if a seller offers any written warranty, or enters into a service contract with you within 90 days of the sale, that seller cannot disclaim implied warranties at all.6Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranties The seller may limit the duration of implied warranties to match the written warranty’s length, provided the limit is reasonable, clear, and prominently displayed, but a flat disclaimer is void.
What “Full” and “Limited” on the Label Mean
Every written warranty on a consumer product over $10 has to be labeled either “Full” or “Limited.” That word is a legal classification, not marketing.7Office of the Law Revision Counsel. 15 USC 2303 – Designation of Written Warranties
A “full” warranty has to meet four federal minimum standards. The manufacturer must fix a defect free of charge within a reasonable time. It cannot cap how long your implied warranty rights last. If repairs fail after a reasonable number of attempts, you — not the company — choose between a refund and a free replacement. And it cannot exclude consequential damages unless that exclusion appears conspicuously on the face of the warranty.8Office of the Law Revision Counsel. 15 USC 2304 – Federal Minimum Standards for Warranties
Miss any one of the four, and the warranty must be labeled “Limited.” Most consumer warranties you’ll see in the wild are limited, because few manufacturers want the open-ended obligations that come with a full warranty.
What Warranties Don’t Cover
Warranties protect against manufacturing defects. They don’t cover everything that can go wrong. Implied warranties specifically exclude problems caused by misuse, ordinary wear, failure to follow instructions, and improper maintenance.9Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law Written warranties typically layer on more exclusions specific to the product.
Common carve-outs include damage from using a product outside its intended environment (running a household appliance commercially, say), cosmetic damage that doesn’t affect function, and failures caused by power surges or natural disasters. The dividing line is whether the defect originated in manufacturing or came from something you or the outside world did to the product. Coverage also expires. Once the written warranty period ends, the manufacturer’s written obligation ends with it, though implied warranty rights may run longer under state law.
Do Third-Party Repairs Void Your Warranty?
Usually not. This is one of the most misunderstood corners of warranty law. Manufacturers routinely put “warranty void if removed” stickers on screws, and consumers routinely assume opening a device kills their coverage.
Under 15 U.S.C. § 2302(c), a manufacturer cannot condition warranty coverage on your using a specific branded part or an authorized service provider. The only exceptions are parts or services the manufacturer provides free under the warranty itself, or situations where the company has obtained a formal FTC waiver by proving the product won’t work properly without the specific item.10Office of the Law Revision Counsel. 15 USC 2302 – Rules Governing Contents of Warranties
Using third-party ink cartridges, generic replacement parts, or an independent repair shop does not automatically void your warranty. A manufacturer can deny a claim only if it can show that the third-party part or repair actually caused the specific defect you’re claiming.9Federal Trade Commission. Businessperson’s Guide to Federal Warranty Law The FTC has enforced this actively, sending warning letters in 2024 to companies whose warranty language suggested coverage depended on using only authorized parts or services.11Federal Trade Commission. FTC Warns Companies to Stop Warranty Practices That Harm Consumers’ Right to Repair
Filing a Warranty Claim
Start with documentation. The original sales receipt is the single most important piece, because it proves when you bought the product and whether coverage is still active. The FTC specifically advises saving your receipt with the warranty.12Federal Trade Commission. Warranties Lost the paper? A credit card statement or the retailer’s digital order confirmation usually works.
Pull the product’s model and serial numbers, generally printed on a sticker or plate on the device. These identifiers let the manufacturer confirm specifications and production date. Then contact the manufacturer through their support website or customer service line and describe the defect.
Be specific. “The screen developed a flickering line across the center after two weeks of normal use” gets a faster and better response than “it stopped working right.” Clear photos or a short video of the defect can speed things up considerably.
Many manufacturers issue a Return Merchandise Authorization number before accepting a returned product. If you’re asked for one, mark it clearly on the shipping package and use a shipping method with tracking so you’re protected if the box goes missing. The manufacturer will inspect the product before deciding whether to repair, replace, or refund.
One protection worth knowing: if you report a defect during the warranty period and the company doesn’t fix it properly, it still has to correct the problem even if the warranty technically expires before the repair is done.12Federal Trade Commission. Warranties
Extended Warranties and Service Contracts
An extended warranty, or service contract, is a separate product you pay for. It’s distinct from the warranty that comes with the item, may be sold by a company other than the manufacturer, and may cover different issues than the original warranty.13Federal Trade Commission. Extended Warranties and Service Contracts
Read the contract before buying. These plans don’t cover every possible repair, and the limits can be narrower than you’d expect. Some exclude accidental damage. Some require you to follow specific maintenance schedules. Some cover only certain components. If a type of repair isn’t listed, assume it isn’t covered.
Most service contracts include a cancellation window of 30 to 60 days for a full refund if you haven’t filed any claims. After that, refunds are typically prorated, and the provider may deduct an administrative or cancellation fee. There’s one legal upside worth flagging: because a seller who enters into a service contract within 90 days of sale cannot disclaim implied warranties, buying a service contract can actually strengthen your baseline protections.6Office of the Law Revision Counsel. 15 USC 2308 – Implied Warranties
When the Manufacturer Says No
A denied claim is not the end of the road. Some manufacturers require you to go through an informal dispute settlement procedure before you can sue. Those procedures have to comply with FTC rules in 16 CFR Part 703: the process must be free to you, the decision-makers must be independent of the manufacturer, and a decision has to come within 40 days of your dispute being filed.14eCFR. 16 CFR Part 703 – Informal Dispute Settlement Procedures The decision is not legally binding on you, so if you don’t like the outcome you can still go to court.15Federal Trade Commission. Magnuson-Moss Warranty Act: Informal Dispute Settlement Procedures
Federal law gives you a direct right to sue. Under 15 U.S.C. § 2310, a consumer harmed by a warranty breach can bring a case in state or federal court, and if you win, the court can award attorney’s fees and costs on top of damages.16Office of the Law Revision Counsel. 15 USC 2310 – Remedies in Consumer Disputes That fee-shifting provision is a meaningful reason for manufacturers to take valid claims seriously. Most individual warranty disputes end up in state court or small claims court, where filing fees typically run from about $15 to $300.
If your problem is a vehicle, every state and the District of Columbia has a lemon law that adds further protections for new cars with recurring manufacturer defects. The specifics vary by state, but these laws generally entitle you to a replacement or refund when a new vehicle can’t be repaired after a reasonable number of attempts.