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Does a Non-OEM Part Actually Void Your Appliance Warranty?
No, not automatically. Under the Magnuson-Moss Warranty Act, a federal law enforced by the FTC, a manufacturer cannot void your appliance’s warranty just because you installed a non-OEM or aftermarket part. They can only deny coverage for a specific repair if they can prove that part actually caused the damage. Most warranty pages never explain that distinction. Here’s what the law actually allows, and where its real limits are.
What the Magnuson-Moss Warranty Act Actually Says
Magnuson-Moss is a federal consumer protection law enforced by the FTC. It covers any written warranty on a consumer product over $15, which puts household appliances squarely inside it. Under this law, a company cannot claim your warranty is void, or deny a claim, simply because a non-OEM part is present or because someone other than an authorized technician did the work. Those “warranty void if removed” stickers you’ve probably seen on electronics and appliances are largely unenforceable for the same reason.
This isn’t limited to cars. In 2022, the FTC took action against Harley-Davidson and an outdoor power equipment manufacturer for illegally telling customers their warranties would be void if they used third-party parts or independent repair shops, and ordered both companies to correct the record with customers.
The One Real Exception
The law isn’t a blank check. If a non-OEM part is defective, or installed incorrectly, and it actually causes damage to another covered component, the manufacturer can deny coverage for that resulting damage and charge you for the repair. The catch is who carries the burden of proof: they have to show the part caused the failure, not just that it was present when something else broke.
Can they deny your claim?
| Situation | Can they deny the claim? |
|---|---|
| Non-OEM part installed and working fine, an unrelated part later fails | No |
| Warranty language simply states "voids if non-OEM parts are used" | No, that clause is largely unenforceable on its own |
| Non-OEM part is defective or miswired and damages another part | Yes, for that specific damage, if they can prove it |
| You did the repair yourself instead of using an authorized tech | No, that alone isn't grounds to void coverage |
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When You Should Still Be Careful
Even with the law on your side, some repairs carry real risk beyond warranty status. Sealed refrigeration components (compressors, evaporators, refrigerant lines) require EPA-certified handling, and gas connections have their own safety rules, regardless of what your warranty says. It’s also worth keeping your receipt and the old part’s packaging. If a dispute ever comes up, that’s your easiest proof of exactly what you installed and when.
What to Do If a Company Denies Your Claim Anyway
Ask them to show, in writing, exactly how the non-OEM part caused the specific failure, not just that it’s present. That’s the actual legal standard they have to meet. If they can’t produce that, you can file a complaint with the FTC at ftc.gov/complaint or with your state attorney general’s consumer protection office.
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FAQs
Does using an aftermarket part always protect me legally?
It protects you from an automatic, blanket denial. It does not protect you if the part itself is proven to have caused damage to a covered component, that specific damage can still be denied.
What about “warranty void if removed” stickers?
Largely unenforceable under the Magnuson-Moss Warranty Act, unless the manufacturer can show a direct causal link between the tampering and the failure.
Does this law apply to appliances, or just cars?
It applies to any consumer product with a written warranty over $15, which includes household appliances. The FTC has enforced it against outdoor equipment and grill manufacturers, not just automakers.
Do I need an authorized technician to keep my warranty valid?
No. Using an independent repair person, or doing the work yourself, is not by itself grounds to void your warranty.
What should I do if a manufacturer denies my claim over a non-OEM part?
Ask for written proof that the part caused the specific failure. If they can’t provide it, you can file a complaint with the FTC or your state attorney general.