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Come Back Home to Comfort

Schedule Your HVAC Service

Allow our experts to service the HVAC system of your home or business professionally. Reach us now at (510) 610-3123, or fill out the form below to get started.

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    High-Quality Heating & Cooling Services

    Looking for a Professional HVAC Contractor Near Sunnyvale, CA? We’ve Got You Covered

    Welcome to Grumpy's HVAC. If you need a dependable HVAC contractor near Sunnyvale, CA, you’ve come to the right place.

    With over three decades of experience in the heating and cooling industry, you can rest assured that our HVAC contractors will provide you with second to none repairs, replacement, and inspecting services. Don’t settle for less than the best, and allow our experts to provide you with the heating and cooling solutions your home or business needs.


    We understand that time is money. As such, we pledge never to waste our customers’ time! We’ll be there on time, always. 


    We pride ourselves on bringing over three decades of experience to the table. You can rely on our experts to provide you with high-quality workmanship.

    Good Attitude

    We believe that providing great customer service is of the utmost importance. Our experts are always ready to deliver service with a smile!


    There’s not an HVAC issue that our experts can’t tackle. We’ve got you covered, from AC and furnace repairs to more complex HVAC retrofits.

    We’ve Been Doing This for a While

    When it comes to something as valuable as your home or business, you should only work with the best contractors you can find. Working with HVAC systems is not the exception! Our experts count with decades of experience in various related fields, improving our services when compared to other contractors. On top of that, we’re a family business. We understand the importance of having a properly working HVAC unit in our homes. We’re also very particular when it comes to our customers’ businesses, as we want to help them thrive, not fail!

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    We’re Your HVAC Service One-Stop-Shop!

    We Offer All-Inclusive Heating & Cooling Services

    Our goal is to be your only point of contact for all your heating and cooling needs.

    Whether you need AC repair, furnace repair, or even an HVAC retrofit, we’ve got you covered. Our experts have access to specialized tools and equipment to tackle your needs professionally and timely. On top of that, we can also assist you with furnace replacement and various AC replacements as well.

    Contact an HVAC Professional Today

    If you’re ready to get your heating and cooling needs servicing by a team of tried and true professionals near the Sunnyvale, CA, area, you’re in the right place! Contact us today to set up an appointment at your earliest convenience. Make sure to ask for a free estimate and our senior discounts while you’re on the phone with us!

    Get Professional Heating & Cooling Services!

    Areas We Serve

    We proudly offer our services near Sunnyvale, CA, and the surrounding areas. Reach us today at (510) 610-3123 to learn more about which areas we serve. 

    • Palo Alto, CA
    • Sunnyvale, CA
    • Alameda County, CA
    • Santa Clara County, CA
    • San Jose, CA
    • San Francisco, CA
    • Oakland, CA
    • Fremont, CA
    • Mountain View, CA

    Our Clients' Testimonials

    • 5 star rating

      We had Dave remove a very old forced air furnace that was in a closet in our hall and had... read more

      Kevin D.

      David was kind, courteous and kept me informed. On time each day and did an excellent job. Since I needed... read more

      Carol Lynch
      5 star rating

      My relatively new electric furnace stopped working on Thanksgiving day, which also happened to be the coldest day of the... read more

      Lauren S.
    • 5 star rating

      My 1944 Victory Village house had the old original gas heater in the crawl space - dead. No A/C at... read more

      Jeanvieve W.

      We hired David to fix a flaky furnace on the home we just moved into. He arrived on time and... read more

      Dave Millman

      Excellent, professional services. Got my HVAC up and running beautifully. Punctual, reliable and a great partner to work... read more

      Patty Johnston
    • We called Grumpy's to replace the 70-year-old gas furnace in our new-to-us house. David came by, discussed our options, gave... read more

      Joe Bayes

      Grumpy's is great, truly wonderful! They're responsive, very knowledgeable, fairly priced, and professional. I'm so grateful for how seamless... read more

      Kelly Knight

      Excellent professional service, the charm is free. Real commitment to doing things right is what makes Grumpy's stand out.

      Jeannette Tetz
    • 5 star rating

      We hired David to fix a flaky furnace on the home we just moved into. He arrived on time and... read more

      Dave M.
      5 star rating

      What a find! I couldn't be happier with David and the work he did for us after another company (Hussey... read more

      Cynthia H.

      I am a plumbing contractor who has been using David and Grumpy's HVAC for the last 6 years and I... read more

      Will Feliciano
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