At Sterling Mechanical, we believe your trust is earned, not assumed. That’s why every installation, repair, and maintenance service we perform is backed by one of the strongest warranties in the San Diego area. Our warranty isn’t just fine print—it’s our promise that we will stand by our work long after we leave your driveway.

When you choose Sterling Mechanical, you’re choosing:

100% Satisfaction Guarantee

If you’re not completely satisfied with the quality of our work, we’ll make it right—at no additional cost to you. This isn’t a 30-day promise; it’s our ongoing commitment for the full length of your warranty coverage.

Labor Warranty on New Installations

All new HVAC, plumbing, and ventilation system installations come with a comprehensive labor warranty—covering any workmanship-related issues that may arise during the warranty period. We don’t just walk away after the install; we ensure your system performs exactly as it should.

Manufacturer Warranty Registration

Most manufacturers require product registration to activate full warranty coverage. We take care of that for you, so you get the maximum protection available for your equipment—often 10 years or more.

Parts Warranty

If a part we install fails within the manufacturer’s warranty period, we’ll replace it—coordinating with the manufacturer and handling all paperwork on your behalf.

Repair Guarantee

All repairs performed by Sterling Mechanical are covered for [X] days from the date of service. If the same issue returns during that time, we’ll come back and fix it for free.

No Surprise Costs

If a warranty-covered issue arises, you’ll never pay for repeat labor or covered parts. You’ll know exactly what’s included and what’s not before any work begins.

What Our Warranty Covers

• HVAC system installations, including furnaces, ductless mini-splits, heat pumps, and air conditioners

• Plumbing installations and water treatment systems

• Ventilation systems, including attic fans, bath fans, and kitchen hoods

• All parts installed by Sterling Mechanical (within manufacturer coverage)

• All labor performed by our certified technicians during the coverage period

What Our Warranty Does Not Cover

• Damage caused by improper use, lack of maintenance, or modifications by anyone other than Sterling Mechanical

• Issues caused by factors outside of our control (power surges, natural disasters, flooding, etc.)

• Parts or equipment not supplied or installed by Sterling Mechanical

Our Promise to You

We built our business on referrals and repeat customers—which only happens when you treat people right. That means showing up on time, doing the job to the highest standard, and standing behind our work with a warranty that actually means something.