AC Warranty: What It Covers and What It Does Not

Standard Manufacturer Warranty Coverage

Every new AC system comes with a manufacturer's warranty that covers defective parts. The coverage structure is remarkably similar across major brands (Carrier, Trane, Lennox, Goodman, Rheem, York) because they all compete for the same market. The typical warranty includes a 5-year base parts warranty on all components, a 10-year extended parts warranty on the compressor (the most expensive component), and a 1-year labor warranty covering the installing contractor's work.

Some brands offer enhanced warranties when the system is registered within the required window. Goodman and Amana provide a limited lifetime compressor warranty on select models. Carrier and Trane extend their parts warranty from 5 to 10 years with registration. Lennox offers similar 10-year parts coverage on registered systems. Without registration, most manufacturers default to the shorter 5-year coverage, costing you five years of protection on a simple administrative step.

The registration window is typically 60 to 90 days from the installation date. You need the model number, serial number, installation date, and installing contractor's information. Most manufacturers offer online registration through their website, and the process takes about five minutes. If your system was recently installed and you have not registered it, check whether you are still within the window and complete the registration immediately.

What Warranties Do Not Cover

Labor costs after year one: The manufacturer warranty covers the replacement part, but the labor to install it is your responsibility after the first year. For a major repair like compressor replacement, the warranty saves you $400 to $1,500 on the compressor part, but you still pay $400 to $1,000 for labor plus $200 to $600 for refrigerant recovery and recharge. For an evaporator coil replacement, the warranty saves $800 to $2,000 on the part, but labor and refrigerant still run $1,000 to $2,500.

Refrigerant: No manufacturer warranty covers the cost of refrigerant. Any repair that requires recovering and recharging refrigerant (compressor, coil, or any repair involving the sealed system) incurs refrigerant costs that the homeowner pays regardless of warranty status. With R-410A now running $50 to $90 per pound, this can add $200 to $600 to a warranted repair.

Normal wear items: Capacitors, contactors, relays, fan motors, and other components that wear out through normal use are typically covered during the parts warranty period, but the labor to replace them is not covered after year one. Since these are the most common failures, the practical value of the parts warranty on wear items is modest.

Damage from improper installation: If the system was not installed according to manufacturer specifications, warranty claims can be denied. Common installation defects that void coverage include incorrect refrigerant charge, improper electrical connections, inadequate airflow, and failure to install required accessories like a filter drier or hard-start kit.

What Voids Your Warranty

Lack of maintenance documentation: Most manufacturers require proof of annual professional maintenance to honor warranty claims on major components. If you cannot show maintenance records (invoices from a licensed HVAC company), the manufacturer may deny your claim. Self-performed maintenance may or may not satisfy this requirement depending on the manufacturer's terms.

Unlicensed installation or repair: Having the system installed or repaired by someone who is not a licensed HVAC contractor can void the warranty entirely. This includes DIY repairs, handyman repairs, and work performed by contractors without proper HVAC licensing for your state.

Using non-approved parts: Replacing components with non-OEM (non-original equipment manufacturer) parts can void the warranty on other components if the aftermarket part causes damage. This is most relevant for refrigerant (using the wrong type), filters (using non-approved sizes), and capacitors (using incorrect ratings).

Environmental damage: Warranties do not cover damage from floods, lightning strikes, power surges, hail, or other acts of nature. These events are covered by your homeowner's insurance policy, not the equipment warranty. If a power surge damages your compressor, file a claim with your homeowner's insurance or your utility company if the surge originated from the grid.

Extended Warranties and Home Warranty Plans

Extended warranties from the manufacturer or installer add labor coverage beyond the first year, typically extending to 5 or 10 years. These cost $300 to $800 at the time of installation and cover labor costs for any warranted repair. For homeowners who want complete coverage, an extended labor warranty is usually a good investment because a single compressor or coil repair can cost $400 to $1,000 in labor alone.

Home warranty plans from companies like American Home Shield, First American, and Choice Home Warranty cover HVAC repairs as part of a broader home systems coverage. These plans cost $400 to $800 per year with a $75 to $125 service call fee per visit. They can be cost-effective if you have multiple aging systems (HVAC, plumbing, appliances) that are likely to need repairs, but the coverage terms vary widely and some plans have caps on HVAC payouts that may not cover a full compressor or coil replacement.

Before purchasing a home warranty plan for HVAC coverage specifically, compare the annual cost of the plan against the cost of a maintenance plan from an HVAC company ($150 to $300 per year). The HVAC maintenance plan prevents most failures through regular service, while the home warranty plan pays for repairs after failures occur. Prevention is generally more cost-effective than repair coverage.

How to File a Warranty Claim

When a component fails that you believe is under warranty, the process starts with your HVAC contractor, not the manufacturer. Call a licensed HVAC company, describe the problem, and mention that the system may be under warranty. The technician diagnoses the issue, identifies the failed component, and checks the warranty status using the unit's serial number and model number.

If the component is covered, the contractor orders the replacement part through the manufacturer's warranty program. Parts are typically shipped directly to the contractor within two to five business days. You pay for the service call, labor, and any non-covered materials (refrigerant, filter drier, etc.), but the part itself is provided at no cost. Keep all documentation, including the service invoice, warranty claim number, and proof of the replaced part, for your records.

Transferring Your Warranty When Selling Your Home

Most manufacturer warranties are transferable to a new homeowner when the house is sold, but the process varies by brand. Some manufacturers allow automatic transfer with no paperwork, while others require the new owner to submit a transfer request within 30 to 60 days of the home sale. Carrier, Trane, and Lennox all offer transferable warranties with proper documentation. Goodman warranties are generally non-transferable, reverting to the shorter base warranty period upon home sale.

A transferable warranty adds value to your home by giving the buyer confidence that major HVAC components are covered against defects. When listing your home for sale, include the warranty documentation, maintenance records, and system registration information in your disclosure package. A home with a documented, transferable AC warranty on a relatively new system is a genuine selling point, especially in hot climates where the AC is a critical and expensive home system.

If you are buying a home, ask the seller for the AC system's model number, serial number, installation date, and warranty registration documentation. Verify the warranty status directly with the manufacturer before closing. Finding out that a 3-year-old AC system has an unregistered warranty (defaulting to 5-year coverage instead of 10-year) gives you leverage to negotiate the purchase price or require the seller to complete the registration before closing.