LJ Mechanical Heating & Cooling Inc

Your Trusted HVAC Expert in Gilroy, CA


Hire us for Heating and Cooling Repairs in Gilroy, California and Surrounding Areas

Free Phone Consultations!

Gilroy, California, and Surrounding Areas

EMERGENCY SERVICE

EXPERT SERVICE

YEARS OF EXPERIENCE

Welcome to LJ Mechanical Heating & Cooling Inc

At LJ Mechanical Heating & Cooling Inc, your comfort is our priority. Owned and operated by Larry Acosta, our company provides professional HVAC installation, repair, and maintenance services designed to keep your home comfortable year‑round.

With more than two decades of hands‑on experience, Larry personally handles every project, ensuring the highest level of care, precision, and accountability. When you choose LJ Mechanical, you’re not just getting an HVAC technician—you’re getting a dedicated professional who treats your home like his own.

  • Service Areas

    • Gilroy, CA
    • San Jose, CA
    • Campbell, CA
    • Morgan Hill, CA
    • Salinas, CA
    • Capitola, CA
    • Santa Cruz, CA
    • Monterey, CA
    • Watsonville, CA
    • Carmel, CA
    • Hollister, CA
    • San Juan Bautista, CA
    • Tres Pinos, CA

Comprehensive Heating & Cooling Services

Thermometer icon with upward and downward triangles, indicating temperature controls.

 Heating Services

Expert furnace and heating system repair, replacement, and installation to keep your home warm and safe during colder months. Fast diagnostics and dependable solutions you can trust.

Black flame icon.

Furnace Installation & Repair

Complete AC repair and installation services to restore comfort and improve cooling efficiency. Whether it’s a minor fix or a full system upgrade, we keep your home cool and comfortable.

Black and white illustration of an air conditioner. Shows the indoor and outdoor units, with air flow lines.

Air Conditioning Services

Complete AC repair and installation services to restore comfort and improve cooling efficiency. Whether it’s a minor fix or a full system upgrade, we keep your home cool and comfortable.

Black and white outline of an air compressor with a cylindrical tank, two gauges, and one wheel.

Heat Pump Services

Installation, repair, and maintenance of heat pump systems for efficient heating and cooling. Heat pumps offer year‑round comfort with energy‑saving performance.

Black and white illustration of a box fan.

HVAC Maintenance

Routine maintenance and system tune‑ups to improve efficiency, extend equipment life, and prevent unexpected breakdowns. Regular care helps keep your system running smoothly all year.

Carrier logo in an oval, blue with white text,

LJ Mechanical Heating & Cooling Inc: Reliable HVAC Specialists in Gilroy, California

LJ Mechanical Heating & Cooling Inc, located in Gilroy, California, exemplifies professionalism and expertise within the HVAC field. Larry Acosta, an experienced HVAC professional, is in charge of our wide range of heating and cooling services designed to meet your individual requirements. Larry's practical involvement blends more than twenty years of commitment and guarantees that every project adheres to our strict criteria for honesty and excellence. Our dedication to energy-saving options and careful focus on specifics ensures that your home's HVAC systems operate at their best, delivering comfort and dependability all year round..

GET A FREE ESTIMATE

We bring comfortable living to every home.

Carrier logo with blue oval, white text, and tagline

LJ Mechanical Heating & Cooling Inc: Reliable HVAC Specialists in 

LJ Mechanical Heating & Cooling Inc, located in Gilroy, California, exemplifies professionalism and expertise within the HVAC field. Larry Acosta, an experienced HVAC professional, is in charge of our wide range of heating and cooling services designed to meet your individual requirements. Larry's practical involvement blends more than twenty years of commitment and guarantees that every project adheres to our strict criteria for honesty and excellence. Our dedication to energy-saving options and careful focus on specifics ensures that your home's HVAC systems operate at their best, delivering comfort and dependability all year round

GET A FREE ESTIMATE
Air conditioning unit on a concrete pad next to a wall.
A person is working on a heating and air conditioning unit inside a wooden frame.
Two HVAC units stacked in an attic, with insulated ductwork.
Two large silver tanks, likely for heating, in a room. One tall, one short and round.

Why Homeowners Choose LJ Mechanical Heating & Cooling Inc

Homeowners trust LJ Mechanical Heating & Cooling Inc for dependable service, honest recommendations, and quality workmanship. As an owner‑operated business with over 20 years of experience, we take pride in delivering personalized HVAC solutions that put comfort, reliability, and customer satisfaction first.

  • Over 20 Years of Experience
  • Owner‑Operated, Personalized Service
  • Honest, Straightforward Pricing
  • Quality Workmanship You Can Rely On
  • Local Service You Can Trust

We believe in doing the job right—no shortcuts, no upselling, no surprises. Just reliable comfort you can count on.

250

successful Projects

15

Expert Staff Members

1000+

Happy Clients

CLIENT TESTIMONIALS

What Client Say About Our Work

MORE REVIEWS

"LJ Mechanical is the best! Extremely knowledgeable, honest, professional, and gets the job done super fast! They came out and had our AC up and running in no time after us calling. Larry is the owner. Call him!!"

Neena Monet

"We did the concrete & need to have the AC removed & installed. Larry did a great job! He is  professional & a great communicator. I’m glad to have Larry to do the job."

Florencia Djoe

"We had Larry replace an old air conditioning and heating unit in our mobile home. Obtaining the permit took longer than we expected, but once obtained he scheduled the installation quickly. His crew was great, and seemed very knowledgeable of everything required. Finished off in less than a day, and cleaned up and re- installed the skirting just like they were never there. Larry assured we met inspection and communicated with the inspector to make sure we met all requirements. Very competitive price and good experience for us. We recommend highly."

Jerry Hohman

"I was referred to contact Larry regarding AC not coming on. Larry was very responsive and when he checked out the unit it was just a relay and capacitor that he found defected. He replaced parts on the spot and unit was up and running within 45 minutes. I can't express how much I appreciate a company like Larry's that is not out to rip you off with unnecessary charges. Very honest and great guy and highly recommend. We also had him out last week to just look over our heater. He found some corrosion on one of the contacts and cleaned it up. Heater working great. Thank you, Larry!"

John Seeger

LET'S TALK

Comfort You Can Count On—All Year Long

Whether your system needs a quick repair, a full replacement, or routine maintenance, LJ Mechanical Heating & Cooling Inc is here to help. Our commitment to honesty, integrity, and quality workmanship means you’ll always receive dependable solutions and peace of mind.

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Frequently Asked Questions

  • How often should I have my HVAC system serviced?

    We recommend having your HVAC system serviced twice a year—once in the spring for cooling maintenance and once in the fall for heating maintenance. Regular maintenance ensures your system runs efficiently and extends its lifespan.

  • What types of heating systems do you install?

    We install a variety of heating systems, including furnaces, heat pumps, and ductless mini-splits. Our team will assess your home’s needs and recommend the most efficient heating solution.

  • Do you offer emergency HVAC repair services?

    Yes, we provide emergency HVAC repairs for both heating and cooling systems. If you experience a breakdown, you can rely on our team to provide prompt, professional service to restore comfort in your home or business.

  • What makes LJ Mechanical Heating & Cooling Inc different from other HVAC contractors in Gilroy?

    Our business stands out due to our commitment to customer satisfaction, experienced technicians, and 24/7 emergency services. We are known for our reliability and affordable pricing.

  • Can you help with indoor air quality issues?

    Yes, we offer indoor air quality solutions such as air purifiers, humidifiers, and ventilation systems. These systems can help reduce allergens, improve air circulation, and maintain a comfortable environment.

  • Do you provide free estimates for HVAC installations?

    Absolutely! We offer free estimates for new HVAC system installations. Our experts will assess your home’s needs and recommend the best system within your budget.

  • How can I tell if my HVAC system needs repair?

    Some common signs that your HVAC system needs repair include uneven temperatures, strange noises, foul odors, or poor airflow. If you notice any of these issues, it’s time to call in the experts at LJ Mechanical Heating & Cooling Inc.

  • What brands of HVAC systems do you work with?

    We work with several trusted HVAC brands, including Trane, Lennox, and Carrier. Our goal is to provide high-quality systems that deliver optimal performance and energy efficiency.

  • How do I improve my HVAC system’s energy efficiency?

    We recommend regular maintenance, upgrading to a high-efficiency system, installing programmable thermostats, and ensuring proper insulation to improve energy efficiency. Our team can provide additional tips tailored to your system’s needs.

  • Do you offer HVAC financing options?

    Yes, we provide flexible financing options to help make your HVAC installation or repair more affordable. Our team will work with you to find a plan that fits your budget.