Coverage has conditions—such as eligible products, owners, dates, causes, parts, remedies, and exclusions. The certificate defines the limits.
HVAC warranty information
Know what your warranty actually covers.
A new HVAC installation can include several different kinds of coverage. This guide explains the layers, the limits, the customer's responsibilities, and what happens when a claim is needed—without tying the explanation to one manufacturer.
The most important distinction
A 10-year parts warranty usually is not a 10-year free-repair promise.
It generally means the manufacturer will provide an approved replacement part or part credit when an eligible component fails from a covered manufacturing defect during the stated term. Diagnosis, labor, refrigerant, freight, access, and other costs can still apply unless separate written coverage includes them.
The covered item is usually the approved replacement component. “Parts” does not automatically include the work or materials needed to replace it.
A defect is a covered problem in materials or factory workmanship. A component can fail for a noncovered outside cause.
The coverage clock and start date come from the exact written terms. Replacing one part usually does not restart the original system term.
The complete coverage picture
One installation can have three separate coverage layers.
Do not combine these into one promise. Each layer has a different provider, purpose, term, and written document.
01
Manufacturer limited parts warranty
Covers eligible equipment parts for covered manufacturing defects, subject to the manufacturer’s certificate. The manufacturer—not Sunset—sets eligibility and the remedy.
Look for:Exact model, serial number, term, owner or property rules, covered parts, exclusions, and claim procedure.02
Sunset installation-workmanship warranty
Addresses an installation defect caused by Sunset during the workmanship period written on the proposal or invoice. It is separate from a factory part failure.
Look for:The stated duration, covered installation work, notice process, remedy, and exclusions in your Sunset documents.03
Optional labor or service agreement
May pay some labor or other listed costs when separately purchased or expressly included. It is not assumed merely because equipment has a parts warranty.
Look for:Administrator, deductible, covered labor, service-call rules, limits, exclusions, transfer terms, and expiration date.What was installed?
A “system” may be several separately warranted products.
The outdoor unit, indoor unit, coil, thermostat, and accessories may each have their own model number, serial number, start date, and coverage. One component’s warranty should not be assumed to cover every item in the installation.
Condenser or heat pump, including its factory-installed compressor, coil, fan motor, controls, and valves.
Air handler or furnace, including its blower, controls, heat kit, cabinet, and other listed factory components.
The evaporator coil may be a separate product with its own model and serial number—even when installed with the indoor unit.
Thermostats, zoning, UV lights, purifiers, pumps, surge devices, and other accessories often carry separate terms.
Refrigerant piping, drains, wiring, ducts, pads, stands, fasteners, and transitions are not automatically factory-warranted equipment.
Electrical service, plumbing, roof, walls, ceilings, finishes, drainage path, and existing duct system are separate from the equipment warranty.
Commonly eligible
What a limited parts warranty may cover
Every item still depends on the exact certificate, term, diagnosis, and cause of failure.
- An eligible factory-installed component that fails because of a covered defect in materials or manufacturing workmanship.
- The manufacturer-authorized replacement part, part credit, or other remedy allowed by the written warranty.
- Named components—such as a compressor, coil, motor, control board, sensor, or valve—only when that component and cause of failure qualify.
- Special component-replacement or unit-replacement benefits only when the exact model's written certificate expressly includes them.
Usually separate
What is commonly not included
These costs remain customer responsibility unless a written manufacturer benefit, labor plan, workmanship warranty, insurance policy, or approved estimate says otherwise.
- Diagnosis, service-call, travel, and after-hours charges.
- Labor to access, remove, install, evacuate, charge, program, or test a replacement part.
- Refrigerant, leak search, recovery, disposal, freight, expedited shipping, and return-core charges.
- Cranes, lifts, difficult attic or roof access, carpentry, drywall, painting, permits, and code-required upgrades.
- Corrections to ductwork, drains, electrical service, plumbing, structure, or other property systems outside the warranted equipment.
- Filters, batteries, drain cleaning, routine maintenance, cleaning, adjustments, and other normal-use or consumable items.
- Temporary cooling, lodging, lost income, spoiled property, water or mold remediation, and other incidental or consequential loss unless the written terms say otherwise.
The failure-and-cause rule
A failed part and a covered claim are not always the same thing.
The failed component tells us what stopped working. Diagnosis must also determine why it failed. If a factory defect caused the failure, the part may qualify. If power, airflow, water, corrosion, weather, pests, misuse, neglect, alteration, improper outside work, or another excluded condition caused the same failure, the manufacturer may deny the parts claim.
Maintenance records help show how the equipment was cared for, but maintenance does not turn every future breakdown into a covered defect.
Claim decisionFailed component + root cause + eligibility + written terms
All four must be evaluated before anyone can promise warranty coverage.
Real-world examples
The same word—“warranty”—can lead to very different outcomes.
These examples show how diagnosis, cause, and separate costs affect a claim. They are illustrations, not a promise that any particular failure will be approved or denied.
| What happened | What may qualify | What may remain separate |
|---|---|---|
| Compressor fails internally | The compressor part may qualify if diagnosis supports a covered manufacturing defect. | Diagnosis, labor, refrigerant, recovery, freight, and access are commonly separate unless another plan covers them. |
| Indoor or outdoor coil develops a leak | The coil may qualify when the leak is a covered defect and the coil is within its term. | Leak search, labor, refrigerant, recovery, shipping, and related materials may remain customer-paid. |
| Control board is damaged by a surge or voltage problem | The failed board can be identified, but the cause—not only the failed part—determines coverage. | Damage caused by lightning, a surge, low or high voltage, utility problems, or external wiring is commonly excluded. |
| Motor or compressor damage follows restricted airflow | A covered defect is possible, but airflow and maintenance history must be evaluated. | Damage caused by a neglected filter, dirty coil, blocked duct, or other preventable restriction is commonly excluded. |
| A field-installed refrigerant joint leaks | This may be an installation-workmanship issue if Sunset made the joint and it falls within the written workmanship terms. | It normally is not a defect in a factory part. The proposal or invoice controls any workmanship remedy. |
| Condensate drain clogs or overflows | A separately warranted drain component may qualify if that component itself has a covered defect. | Algae, debris, routine drain clearing, and resulting property damage are usually maintenance or property issues—not a parts claim. |
| Salt, corrosion, flood, storm, pest, or impact damage | Only an express corrosion or special-coverage provision would change the written remedy. | Environmental and outside-cause damage is commonly excluded from standard limited parts coverage. |
| Home is uncomfortable or airflow is uneven | Testing may identify a covered equipment failure if one exists. | Room balance, duct design, insulation, load, humidity, settings, and comfort expectations are not automatically equipment defects. |
Repair is not always replacement
What the manufacturer may provide
The written limited warranty usually gives the manufacturer the right to choose the allowed remedy. Depending on the certificate and availability, that may be an authorized replacement part, a rebuilt or equivalent part, a credit, or a special replacement benefit.
- One failed component does not automatically qualify the entire indoor and outdoor system for replacement.
- An obsolete part may be handled through an authorized substitute or credit according to the written terms.
- Matching-equipment changes, refrigerant conversion, code upgrades, and property modifications may create noncovered costs.
- A replacement part or unit commonly receives only the remaining original term unless the certificate expressly says otherwise.
If something stops working
A warranty claim starts with diagnosis—not a parts lookup.
A model may show active warranty dates while a particular repair is still ineligible. The failed part, root cause, ownership, term, and claim rules must be confirmed.
- 01
Gather the record
Have the installation invoice, property address, model and serial numbers, warranty certificate, and a clear description of the problem.
- 02
Schedule diagnosis
A technician confirms the failed component and investigates why it failed. A warranty lookup alone does not prove that a particular repair is covered.
- 03
Verify eligibility
Sunset or the servicing contractor checks the equipment, dates, ownership, term, exclusions, and claim requirements with the manufacturer or distributor.
- 04
Review the estimate
The written estimate should separate any expected warranty part credit from diagnosis, labor, refrigerant, freight, access, and other noncovered work.
- 05
Authorize and obtain the part
The manufacturer or distributor may require approval, documentation, the old part, or a returnable core before issuing credit.
- 06
Repair, test, and document
After approval, the part is installed, operation is tested, and the repair record is kept with the system documents.
Before repair work begins: ask for the estimate to identify the expected covered part or credit and every charge that remains outside the warranty. Manufacturer approval or credit can be adjusted if inspection later shows an excluded cause or an unreturned required part.
Keep one system file
Records make a future claim easier.
- Final proposal, paid invoice, and installation date
- Model and serial number for every installed piece
- Manufacturer warranty certificate or lookup result
- Thermostat, accessory, and indoor-air-quality product records
- Maintenance, filter, repair, and refrigerant-service history
- Any written Sunset workmanship warranty or separate labor agreement
Homeowner responsibilities
Protect the equipment and document its care.
Follow the equipment manuals and the actual written warranty. Keep suitable filters changed, provide airflow around equipment, maintain drains, schedule appropriate professional care, and address water, electrical, corrosion, or operating problems promptly.
Do not keep running equipment when doing so may worsen damage or create a safety or water concern. Record alterations, relocation, storm damage, and work performed by any contractor. A manufacturer generally cannot require you to purchase paid service from one specific company simply to keep coverage, but damage caused by improper parts or service may be excluded.
Registration or an online lookup is still useful for collecting the exact certificate and correcting product records. It does not replace proof of purchase, serial numbers, diagnosis, or the written terms.
Important for Florida homeowners
Registration and transfer rules are different in Florida.
Florida Statute § 559.956 says a manufacturer’s HVAC warranty may not be conditioned on product registration. It also provides that, when qualifying residential property is conveyed on or after July 1, 2024 while the manufacturer warranty is still in effect, the warranty automatically transfers to the new owner without a transfer fee. The transfer keeps the remaining term—it does not restart or extend it.
Registration is still worth completing when available because it can make records and future lookups easier. Keep the closing documents, installation invoice, model and serial numbers, and warranty certificate. Exact facts and current law control each situation.
Read Florida Statute § 559.956Warranty questions
Clear answers before a breakdown.
This guide describes common structures. Your model-specific certificate, Sunset proposal or invoice, separate service agreement, diagnosis, and applicable law determine the actual result.
Read the controlling documents.
This page is an educational overview—not a replacement for the exact written manufacturer warranty, Sunset proposal or invoice, separate service agreement, diagnosis, or legal advice. If this summary conflicts with an official document or applicable law, the official document and law control.
Need help checking coverage?
Bring the model, serial, and invoice. We’ll help sort out the next step.
Sunset can diagnose the equipment, check the available warranty record, and explain the expected covered part and separate costs before an approved repair moves forward.