September 13, 2026 · 6 min read
Your HVAC system is one of the biggest investments in your home — a new furnace and AC typically costs $6,000–$15,000 installed. Every major brand comes with a warranty, but the details matter. Understanding what's covered (and what isn't) before you need to make a claim can save you thousands of dollars and a lot of frustration.
Parts Warranty vs. Labor Warranty
This is the most misunderstood aspect of HVAC warranties. Most manufacturers offer two separate coverages:
- Parts warranty (from the manufacturer): Covers the cost of replacement parts — compressor, heat exchanger, control board, motors, etc. Typical duration is 5–10 years; some brands offer lifetime heat exchanger warranties on select models.
- Labor warranty (from the installer): Covers the cost of the technician's time to diagnose and install the replacement part. This is separate from the parts warranty and varies by installer. Some offer 1 year, some offer 5, some offer 10.
Here's the catch: if your compressor fails in year 7 and you have a 10-year parts warranty but only a 1-year labor warranty, the manufacturer sends a free compressor — but you still pay $800–$1,500 in labor to install it. Always ask about labor warranty length when getting quotes for a new system.
Registration Requirements
This is the warranty trap that catches the most homeowners. Nearly every major manufacturer (American Standard, Trane, Carrier, Lennox, Rheem, Goodman) requires you to register your equipment within 60–90 days of installation to get the full warranty. If you don't register:
- Your 10-year parts warranty may drop to 5 years
- Your lifetime heat exchanger warranty may drop to 20 years
- Some brands reduce compressor coverage from 10 years to 5
When we install a system, we handle the warranty registration for you — it's part of our standard installation process. If you bought your home recently and aren't sure whether the previous owner registered the equipment, call the manufacturer with the model and serial number to check.
What Voids Your Warranty
Even a registered warranty can be voided. Common reasons:
- Improper installation — if the original install didn't follow manufacturer specifications (wrong refrigerant charge, undersized ductwork, missing safety devices), the manufacturer can deny a claim. This is why choosing a reputable installer matters more than choosing the cheapest bid.
- Lack of maintenance — most warranties require proof of annual professional maintenance. If you've never had your system serviced and a part fails, the manufacturer may argue that neglect caused the failure. Keep your maintenance records.
- Unauthorized modifications — adding components, changing refrigerant type, or modifying controls without manufacturer approval can void coverage.
- Non-original owner — some brands' warranties are non-transferable, meaning coverage ends when the home is sold. Others transfer but with reduced terms (10-year drops to 5-year for the second owner).
Extended Warranties: Worth It?
Many HVAC companies and third parties offer extended warranties (also called service agreements or protection plans) that extend coverage beyond the manufacturer's warranty. Our honest take:
- Extended labor warranties from your installer: Often worth it. They're relatively affordable ($200–$500 for 5–10 additional years) and save you from surprise labor bills during the period when parts are still covered by the manufacturer.
- Third-party home warranty plans: Usually not worth it for HVAC. They have low coverage limits ($1,500–$2,500 per claim, while a compressor replacement costs $2,000–$4,000), high deductibles, and a reputation for denying claims based on "pre-existing conditions" or "lack of maintenance."
What a Good Installer Provides
At PJ's, every new system installation includes:
- Full manufacturer warranty registration handled for you
- Documentation of model numbers, serial numbers, and installation date
- A copy of the manufacturer's warranty terms
- Our own labor warranty clearly spelled out in writing
- Maintenance reminders to help you keep your warranty valid
If you're buying a new home, ask the seller for all HVAC documentation — installation date, installer name, warranty registration confirmation, and maintenance records. That paperwork is worth real money if something goes wrong. Know the signs that your system may be nearing the end of its life.