I’m Chris, I’ve been doing HVAC in Calgary for 15 years at Calgary Air Heating and Cooling Ltd, and I can tell you this: the paperwork you get after a new air conditioner is set up matters almost as much as the unit itself. Not because you’re planning for failure, but because if something does go sideways, you want to know who’s on the hook. You, the manufacturer, or the contractor. It sounds simple. It rarely stays simple.
Most homeowners assume there’s one big promise that covers everything. Then a compressor quits, or a coil starts leaking, or the thermostat wiring was a little off, and suddenly you’re hearing phrases like parts only, labour not included, and registration required. I’ve seen people miss a deadline by a week and lose years of coverage. That one stings, because it’s not a mechanical problem, it’s just admin.
There are usually a few layers to sort out. The factory backing on the equipment itself is one layer. The contractor’s guarantee on the workmanship is another. Sometimes there’s a third one tied to added plans or store-bought protection, and those can have odd fine print, like needing annual maintenance records. I’m not against maintenance, obviously, but I’ve also seen perfectly good systems denied because someone couldn’t find an old invoice in a drawer.
And yes, your habits can show up in these conversations. Dirty filters, blocked outdoor units, running the system with the panels off because “I was just checking something”, it all gets noticed. Not trying to scold you. I just want you to go into a new AC job knowing the promises you’re paying for, what they include, what they don’t, and how to avoid the easy mistakes that turn a straightforward claim into a headache.
Manufacturer equipment warranty: parts covered, registration steps, and coverage length
Most air conditioner brands back their equipment, not the labour. That means if a part fails because it was built wrong, the maker supplies the replacement part, and you still pay someone to diagnose it, pull it out, and put the new one in. I see homeowners get surprised by that part of it, because the unit is “new” so it feels like everything should be free for a while. Usually anyway.
Parts coverage is mainly the big-ticket stuff. The compressor is the headline item, and it is also the one that makes the most noise when it goes bad. Outdoor fan motors, control boards, contactors, capacitor kits, pressure switches, sensors, and sometimes the indoor coil can fall under the maker’s parts promise too, depending on the brand and model family. Thermostats are a coin toss, filters are a no, and anything you damage yourself is also a no. I have walked up to condensers that look like they were used as a bike rack all winter, fins smashed flat, and then the owner is upset the factory will not treat that as a defect. Fair enough, but it is not how the paperwork reads.
There are also exclusions that catch people. Refrigerant itself is often not included, and neither is “find the leak” time. If the indoor coil is covered but you have to reclaim, pressure test, pull a vacuum, and recharge, the bill can still sting. I have seen coils approved by the factory and the customer still pays a decent chunk because labour and refrigerant are separate line items.
Registration is where you either protect yourself or you accidentally cut your coverage short. Most manufacturers ask you to register the serial numbers within a set window after the system is set up at your house. Miss that window and you might drop from a longer term to a basic term, and they will not bend because you “didn’t know.”
- Find the model and serial numbers on the outdoor unit data plate, and on the indoor coil or air handler if it is a matched system.
- Keep your invoice and the date the system was put in service, because that date is usually the start date.
- Register on the manufacturer’s site, or fill the card if they still include one, and double-check the address and email so you can pull proof later.
- Save a screenshot or confirmation number. I have had to help people hunt this down years later, and it is painful.
Coverage length depends on the brand, but a common setup is a shorter base period that applies automatically, and a longer parts period if you register on time. Compressors often carry longer coverage than “all other parts.” Some lines also add a separate term for coils. And yes, it can be different if you are not the original owner of the home. I have been on calls in Calgary where the system is only five years old, but the house changed hands and the maker treated it as reduced coverage. Nobody likes that phone call.
If you want the least drama later, keep the paperwork in the same place you keep your property tax stuff, and do not throw out the serial number stickers when you clean the mechanical room. Also, treat the outdoor unit like it costs money, because it does. Keep snow and dog hair and cottonwood fluff out of it, do not store patio stones against the coil, and do not blast it with a pressure washer. Most of the time, at least, a “failed part” turns out to be a simple airflow or maintenance problem that the factory is not going to pay for anyway.
Installer workmanship coverage: labour defects, how a claim works, and time windows
Workmanship coverage is the one that’s on us, not the equipment maker. It’s aimed at labour slip-ups that show up after the job is done, like a flare fitting that wasn’t seated quite right and starts weeping refrigerant, a condensate drain that’s pitched wrong so you get water where you shouldn’t, a loose low-voltage connection that makes the outdoor unit act possessed, or a lineset that wasn’t strapped well and starts rattling against the siding at 2 a.m. I’ve seen all of these on real houses, and yes, sometimes the system “runs fine” for a while and then the weather changes and the weak spot finally shows. If you’re shopping for window air conditioning installation near me, ask the contractor to spell out whether they cover call-out labour for leaks, electrical rework, drainage issues, vibration noise, and airflow fixes, because those are the usual suspects, while damage from renovations, pets chewing wires, or you hosing down the outdoor unit until the electrical compartment fills up, that’s not on the installer.
Claim process and timeframes
Most claims are simple if you keep your invoice and don’t wait a whole season hoping it’ll “sort itself out”. Call the shop, describe the symptom, and they’ll usually book a tech to confirm it’s a workmanship issue versus a part failure or something you did to the system. If it’s our labour, we fix it, and you shouldn’t be paying for the correction visit. Time windows vary by company, but in Calgary I see one year a lot, and some outfits do two years on labour if you keep up basic care and don’t block returns with furniture. Here’s the plain version of the timelines I run into most often:
| Item | Common timeframe | How it usually plays out |
|---|---|---|
| Workmanship coverage length | 1 year (sometimes 2) | Covers labour defects tied to the original job |
| Booking after you report an issue | 2–7 business days | Faster in shoulder season, slower during heat waves |
| On-site diagnosis time | 30–90 minutes | Leak checks, drain testing, electrical inspection, airflow readings |
| Repair turnaround (if no special parts) | Same day to 48 hours | Tighten, re-flare, re-route drain, rewire, re-level pad, add isolation |
Q&A:
Does my new AC come with both a manufacturer warranty and an installer warranty?
Usually, yes—these are two separate protections. The manufacturer warranty covers defects in the air conditioner itself (parts, and sometimes limited labor depending on brand or dealer programs). The installer’s warranty covers the quality of the installation work (for example: refrigerant charge accuracy, electrical connections, condensate drain setup, duct connections, and mounting). Ask for both warranty documents in writing, because the coverage, length, and exclusions are different.
How long are typical AC installation warranties, and what do they actually cover?
Many contractors provide a labor/workmanship warranty that runs from 1 year to 2 years, though some offer longer coverage. This warranty usually applies to problems caused by installation errors—miswired components, loose fittings, incorrect thermostat wiring, poor airflow setup, or a condensate leak caused by drain routing. It normally does not cover normal wear, clogged filters, ductwork problems that existed before the install, storm damage, or issues caused by unapproved modifications.
What can void the manufacturer warranty after installation?
Common reasons include not registering the equipment within the brand’s required window (often 60–90 days), installing the unit outside of the brand’s rules (wrong match of indoor/outdoor components, incorrect refrigerant type, or improper line-set sizing), or failing to meet maintenance requirements stated in the warranty terms. Some brands also restrict coverage if the unit wasn’t installed by a licensed contractor, or if repairs are done with non-approved parts. Keep copies of the startup checklist, permit/inspection paperwork (if applicable), and maintenance receipts.
Is “10-year parts warranty” the same as “10-year labor warranty”?
No. A 10-year parts warranty typically means the manufacturer supplies replacement parts for covered failures, but you still pay for diagnosis, labor, refrigerant, and related materials. A labor warranty is a separate plan (from the contractor, a third party, or a dealer program) that may pay the technician’s time and certain service fees. Read the fine print: some labor plans have deductibles, caps per visit, exclusions for refrigerant, or require annual maintenance by an approved company.
If my AC stops cooling after a few months, who pays—installer or manufacturer?
It depends on the cause. If the issue traces back to installation work (for example, a flare fitting leaking refrigerant, a loose electrical connection, or a drain line that was not pitched correctly), the installer’s workmanship warranty usually applies. If a factory component fails (like a compressor, capacitor, control board, or fan motor), the manufacturer parts warranty may cover the part, while labor may be billed unless you also have labor coverage. The fastest way to sort it out is to request a written diagnosis stating the failed component and whether the failure is tied to installation or a factory defect.