Most major HVAC manufacturers write two different warranties into the same piece of equipment. There’s the base coverage that applies automatically, and there’s a longer, registered coverage that only kicks in if the system gets registered with the manufacturer inside a specific window after installation. Miss that window, and the system doesn’t get a second chance at the longer term. It’s locked into the base coverage for good.
The window, brand by brand
The exact terms vary by manufacturer and by product line, and some states restrict registration requirements entirely, so the specific numbers below are a starting point, not a substitute for checking the current terms on a given install:
- Carrier: registering within 90 days of installation is commonly what extends parts coverage from 5 years to 10.
- Rheem: registering within 90 days of installation is commonly what extends functional parts coverage from 5 years to 10.
- Trane: its Registered Limited Warranty commonly requires registration within 60 days of installation to reach the longer coverage term, which varies by product.
- Lennox: commonly requires registration within 60 days of installation (or the closing date for new construction) to unlock its extended parts or labor options, outside of states like California and Quebec where registration requirements are restricted by law.
- Goodman: commonly requires registration within 60 days of installation for extended parts and, on some models, extended compressor coverage.
The pattern across brands is the same even where the exact day count isn’t: a short window, after which the shorter default term is permanent.
Who’s actually supposed to register it
This is the part that causes the most confusion. Dealers often register equipment on the customer’s behalf as part of the install, and homeowners often assume that already happened. It doesn’t happen automatically everywhere, and a customer who assumes their contractor handled it, when the contractor assumed the customer would do it online, is exactly how a window gets missed with nobody realizing it until a part fails years later.
Manufacturers themselves generally advise homeowners not to just assume their dealer registered it, and to ask for confirmation. That’s a reasonable thing for a shop to get ahead of instead of leaving to chance.
What actually happens when it’s missed
A system that misses its registration window doesn’t run any worse the day after the deadline passes. Nothing about the equipment changes. What changes is what happens the day a compressor or heat exchanger fails in year six or seven instead of year two: a registered system gets the part free or heavily discounted, and an unregistered one is out of warranty, with the homeowner paying full price for a repair that would have cost nothing.
That’s the kind of thing a customer remembers, and it’s rarely clear to them that it was a registration deadline and not a product defect. The complaint lands on whoever’s name is on the invoice, whether or not registration was ever that shop’s job to begin with.
Make it part of the install, not an afterthought
The fix is procedural, not technical: register the equipment the same day or same week as the install, every time, and keep a copy of the confirmation with the paperwork the customer gets. It costs a few minutes per job and it removes an entire category of dispute before it can start. A shop that can show a customer their registration confirmation is in a very different position than a shop that has to say “I assumed that was automatic.”
Quick answers
How long do I have to register a new HVAC system for the extended warranty? It depends on the manufacturer, but 60 or 90 days from the installation date is common across major brands. Check the specific terms for the installed model.
What happens if the registration window is missed? The system stays on its shorter base warranty (commonly 5 years on parts) permanently. There’s typically no way to register late and still get the extended term.
Is it the homeowner’s job or the contractor’s job to register the equipment? It varies. Some dealers register on the customer’s behalf as standard practice; others don’t. Manufacturers generally recommend the homeowner confirm directly rather than assume either way.
