HVAC Warranty Registration Ontario 2026: The Step You Skip That Costs Thousands

What manufacturer warranty actually covers (parts vs labour)

Start with the mental model. A residential HVAC warranty has two distinct layers that homeowners routinely confuse. The manufacturer warranty covers defective parts: a cracked heat exchanger, a failed compressor, a leaking coil, a faulty control board. The installer labour warranty covers the work of diagnosing, removing, and reinstalling those parts, plus the installer's own workmanship (a botched refrigerant charge, an improperly vented flue). These are separate promises from separate companies with separate terms.

The advertised 10-year number you see on a furnace or AC ad is almost always parts only. Carrier, Trane, Lennox, Goodman, Rheem, and KeepRite all publish a 10-year parts limited warranty on their mainstream residential furnaces and air conditioners as the registered term.[4] [5] [6] [7] [8] Labour is extra, and on a compressor replacement labour can easily run 1,200 to 2,500 dollars even when the part itself arrives free from the factory. If your contractor has not put a labour warranty in writing on the final invoice, you do not have one.

A second layer that often gets overlooked: the heat exchanger on a gas furnace usually has its own warranty term that is different from the rest of the parts. Trane advertises a lifetime heat exchanger warranty on most residential furnace lines, and Napoleon, Goodman, and KeepRite do the same on their registered furnaces.[1] [2] A cracked heat exchanger is one of the most expensive single components in a furnace and a safety critical one, because a crack can leak combustion gases into the home. Registration is the only thing standing between lifetime coverage and a prorated 20-year term on most mainstream brands.

The registration window gotcha (30/60/90 days by brand)

Every manufacturer sets its own registration clock. The clock starts on the date of installation, not the date of purchase, and misses almost always happen in the same way: the installer moves on to the next job, the homeowner files the paperwork in a drawer, and the window closes quietly. Below are the windows the major brands publish as of the 2026 season.

Read the specific warranty certificate that shipped in the owner packet with your equipment before you rely on any table, because individual product lines sometimes carry their own terms. KeepRite, for example, confirms the 90-day window and the 5-to-10-year parts split directly on its product registration page.[1] Napoleon publishes the same 5-year unregistered versus 10-year registered term across its 9500, 9600, and 9700 furnace series, with the 9700 even extending the no-hassle replacement term to 15 years on registration.[3]

Registered vs unregistered warranty term differences (10-yr vs 5-yr)

The split is not small. For most Ontario homeowners installing a mid-to-high-efficiency furnace or a central AC, the difference between a registered and unregistered warranty is this:

• Parts warranty on furnace or AC: 10 years registered, 5 years unregistered, across KeepRite, Napoleon, Carrier, Bryant, and most Carrier-family equipment sold in Ontario.[1] [2] [3]
• Heat exchanger on a gas furnace: lifetime registered, 20-year prorated unregistered on most Napoleon and KeepRite furnaces, and lifetime registered on most Trane, Goodman, and premium Carrier lines.[1] [3]
• Heat pump compressor: up to 12 years registered on Mitsubishi Electric ductless and Daikin Fit heat pumps, reverting to a base term (commonly 5 to 7 years) if unregistered.[9]
• No-hassle unit replacement: 10 to 15 years registered on select premium furnaces (KeepRite Ion, Napoleon 9700, Lennox SLP99V), typically unavailable at all unless registered.[2] [6]

Translate that into dollars. A compressor replacement on an out-of-warranty 4-ton central AC in the GTA runs roughly 2,400 to 3,800 dollars for the part alone, plus labour. A cracked heat exchanger on a mid-efficiency furnace replaced outside its lifetime warranty window is a 3,000 to 4,500 dollar part. If a furnace fails in year 7 and the owner skipped registration, the homeowner pays for a part that would have been free under the registered term. That is the genuine financial stake of a 10-minute registration form.

How warranties transfer when you sell your home

Warranty transfer rules are the second layer buyers and sellers typically miss at closing. The default position across Carrier, Trane, Lennox, Goodman, and KeepRite is that the original owner's extended registered warranty is not automatically transferable. The new homeowner inherits the base term unless a formal transfer is requested, usually within 90 days of closing, with a transfer fee that runs roughly 50 to 150 dollars depending on the brand.[4] [5]

Some premium lines allow a single lifetime transfer at closing (the Trane XV and Lennox SLP families advertise this), but the transfer still has to be formally requested. A closing without a transfer request is a closing that silently shortens the warranty. For a buyer: during due diligence, ask the seller for the original manufacturer registration confirmation on every piece of HVAC equipment, and file a transfer request through the manufacturer portal within the window. For a seller: the transferred warranty is a tangible selling point on a newer furnace or heat pump, and the handoff takes an afternoon.

Practical rule for home buyers: if the HVAC equipment is less than 10 years old, request the warranty documentation before waiving conditions. If the seller cannot produce a registration confirmation, assume the equipment is on the base unregistered term and price the offer accordingly.

What to ask the installer BEFORE final payment

Leverage is highest before you pay. Once the balance is settled, it is the installer's goodwill that brings them back to finish registration paperwork. Make the following list an unchecked item on the final invoice.

1. Confirm in writing that the equipment has been registered with the manufacturer on your behalf. Ask for the registration confirmation number.
2. Ask for model and serial numbers of every piece of equipment (furnace, AC, heat pump, ductless head, thermostat) on the invoice itself, not just a separate sheet.
3. Confirm the labour warranty term in writing and for how long. A one-year labour warranty is common; 5 to 10 years is the mark of a strong installer.
4. Request a copy of the manufacturer warranty certificate (the booklet that came with the equipment) for your records. The certificate is your enforcement document.
5. Ask for the TSSA permit number and the ESA notification number (if electrical work was done). These are tied to warranty validity, because an uninspected install can be denied coverage.[11]
6. Ask for a start-up and commissioning sheet signed by the technician confirming refrigerant charge, gas pressure, static pressure, and combustion analysis results. Manufacturers increasingly require this for warranty claims.

If you are choosing a contractor and these questions feel awkward to ask, see our Ontario HVAC contractor verification guide for the credential checklist that happens before you even get a quote. The contractors who volunteer warranty paperwork without being asked are the ones you want to work with in the first place.

Common reasons a warranty claim is denied

Reading manufacturer denial letters turns up a small, repeating set of reasons. Every denial category below has been upheld by at least one major Ontario manufacturer at some point in the last three years.

• Missed registration window. The most common denial. Equipment registered on day 91 with a 90-day window receives the base unregistered term regardless of how close to the deadline the form arrives.[1]
• Installation outside the manufacturer manual. Venting length exceeds spec, gas line undersized, condensate trap installed backwards, refrigerant line set charged incorrectly. These are installer errors, but the manufacturer denial letter goes to the homeowner first.
• Missing annual maintenance records. Several brands, notably Mitsubishi and Daikin on heat pumps, reserve the right to require proof of annual professional maintenance. Continuous service records from a qualified contractor typically satisfy this.[9]
• Use of a non-authorized part. A third-party control board or aftermarket blower motor can void the surrounding warranty. Stick to OEM parts for any warranty-covered repair.
• Non-compliant installer. TSSA-registered contractor and the required 313A technician on site are prerequisites under most warranty agreements for Ontario. An install done by an unregistered contractor can be denied on those grounds alone.[11]
• Ownership transfer without a transfer request. Equipment in a home that changed hands without the formal transfer reverts to base coverage.[4]

Many of these overlap with the red flags in our HVAC scam red flags guide, because the operators who cut corners on credentials and permitting are the same ones whose installs fail warranty review.

Documentation to keep for the life of the equipment

Treat your HVAC paperwork the way you treat vehicle service records. The folder needs to survive one or more moves, and it needs to be legible to a technician 10 years from now. Keep the following in a dedicated physical folder and a matching cloud folder:

• Original signed quote and final paid invoice, with model and serial numbers printed on both.
• Manufacturer warranty certificate booklet or PDF, for every piece of equipment.
• Registration confirmation email or printout from the manufacturer, with the confirmation number highlighted.
• TSSA permit, ESA notification of electrical work, and any municipal inspection paperwork.
• Start-up and commissioning sheet signed by the installing technician.
• Annual maintenance reports from a qualified contractor, with the technician's 313A or G2 credential noted.
• Labour warranty certificate from the installer, with term and coverage clearly stated.

When researching which brand to buy in the first place, our Ontario furnace brands comparison breaks out the registered warranty terms and reliability data side by side so the warranty math is visible before the quote, not after the install.

FAQs