HVAC warranties are more layered than most homeowners realize. There’s the manufacturer warranty on the equipment, the extended warranty available through factory-authorized dealers, the contractor’s own workmanship warranty, and in some cases a third-party extended service contract. Understanding each one — and what’s required to maintain coverage — is essential before you sign off on a major HVAC installation.
“The most common warranty surprise I see is homeowners who thought they had a 10-year parts and labor warranty, but actually only have a 10-year parts warranty because the equipment wasn’t registered in time, or because the contractor wasn’t factory-authorized. Those two details — registration and authorization — are the difference between $0 and $2,000 on a compressor replacement seven years from now.”
— Sandra Kim, HVAC system designer and mechanical engineering technologist with 14 years of experience in residential load calculation and system optimization in the local area
Table of Contents
Manufacturer Warranty Questions
What manufacturer warranty comes with this equipment, and what are the conditions?
Most major HVAC manufacturers offer:
Standard warranty (without registration or authorized dealer): Typically 5 years on parts. This is the baseline warranty that applies if nothing special is done.
Registered warranty: When the equipment is registered with the manufacturer within the required period (typically 60–90 days after installation), the warranty extends to 10 years on parts for most major brands.
Authorized dealer enhanced warranty: When equipment is installed by a factory-authorized dealer, some manufacturers offer a 10-year parts and labor warranty, or even longer. This is the most valuable warranty tier — and it requires both registration and authorized installation.
Ask specifically which warranty tier applies to your installation and what the conditions are.
What a good answer looks like: A specific warranty tier named, with a clear explanation of registration requirements and any authorized-dealer conditions.
Are you a factory-authorized dealer for this brand?
Factory authorization — sometimes called “Premier Dealer,” “Elite Dealer,” or a brand-specific equivalent — is required to offer the highest warranty tier from most major manufacturers (Carrier, Lennox, Trane, Bryant, Goodman, etc.). Ask for confirmation of authorization status and verify it on the manufacturer’s website.
What a good answer looks like: Confirmed authorization with the manufacturer, verifiable through the manufacturer’s dealer locator.
Will you register the equipment on my behalf?
Registration must happen within the manufacturer’s deadline — typically 60–90 days after installation. A missed registration deadline drops coverage from the registered warranty to the standard (shorter) warranty. Ask whether the contractor handles registration as standard or whether that responsibility falls to you.
What a good answer looks like: The contractor handles registration and provides you with confirmation of registration.
What does the manufacturer warranty cover, and what voids it?
Ask specifically what the manufacturer warranty covers — parts only, or parts and labor? What events void the warranty? Common voiding conditions include: installation by an unauthorized contractor, failure to maintain the system with annual service, unauthorized modifications to the equipment, and using non-approved refrigerant.
Workmanship Warranty Questions
Do you provide a written workmanship warranty on the installation?
Separate from the manufacturer warranty, the contractor should offer their own written warranty covering defects in how the equipment was installed. Ask for it in writing before the job starts.
What a good answer looks like: A written workmanship warranty document included with the contract.
How long does your workmanship warranty last?
One to two years is standard for HVAC workmanship. Ask the duration and confirm it’s in writing.
What does the workmanship warranty cover?
Ask specifically: does it cover refrigerant leaks from installation connections? Combustion issues traced to improper gas line connections? Airflow problems caused by duct modifications done as part of the installation? The specificity of the answer tells you how seriously the contractor takes their own accountability.
What is the claims process?
Who do I call? How quickly will you respond? Is there any charge for a warranty service call?
What a good answer looks like: A direct phone number, a committed response time, and no charge for valid warranty service calls.
Extended Service Contract Questions
Many HVAC contractors offer extended service contracts — sometimes called maintenance agreements or service plans — that go beyond the manufacturer warranty. These typically include annual maintenance visits plus priority service and discounted labor for repairs.
What does your service contract include, and what does it cost?
If an extended service contract is being offered, ask for a written summary of what it includes, what it excludes, the annual cost, and the cancellation terms. Compare the value against what an annual service call would cost independently.
Is the service contract transferable if I sell the home?
A transferable service contract can be a selling feature. Ask whether the contract can be transferred to a new owner.
Related Questions
- Questions to Ask an HVAC Contractor Before You Hire One
- Questions to Ask an HVAC Contractor About Maintenance
- What to Do If an HVAC Contractor Does Bad Work
- Red Flags When Hiring an HVAC Contractor
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