Maintain Reliable Comfort
Year-Round
Full-service heating and cooling solutions backed by decades of hands-on experience.
Request Service
Schedule Service
We will get back to you as soon as possible.
Please try again later.
Furnace and Heating Systems
Installation, replacement, and repair services designed to keep your home comfortable through every season.
Air Conditioning Services
Complete cooling solutions that address your comfort needs with dependable performance.
Boiler and Ductless Systems
Flexible options for efficient heating and cooling tailored to your home's unique layout.
System Maintenance
Routine service designed to extend equipment life and support consistent operation throughout the year.
Secure Consistent Indoor Climate Control
Full-spectrum HVAC service delivered with transparency and care
When your heating or cooling equipment stops performing the way it should, you need a partner who understands both the technical side and the urgency.
John Lock Air Conditioning & Heating Service, Inc. has been serving Buffalo and Western New York since the 1940s, offering comprehensive HVAC solutions for homes and families across the region. As a third-generation family business, we bring knowledge passed down through the years alongside modern equipment options and field-tested methods.
WE'RE HIRING!
Are you looking for a great place to work? Maybe looking to make a change? John Lock A/C & Heating is looking for people to join our team!
How HVAC Service Unfolds
Every system behaves differently depending on its age, design, and usage patterns. When you contact us, you're connected with someone who takes the time to understand your situation before recommending a course of action. We walk you through what we find, explain your options in straightforward terms, and provide a documented scope of work so there's no confusion about what happens next.
From scheduling to completion, you'll have visibility into each phase of the project. We coordinate timing around your availability, keep the site organized, and make sure you're updated as work progresses. This approach reduces surprises and helps you feel confident in the investment you're making.
Our comprehensive offerings support a wide range of needs:
Installation and replacement of furnaces, air conditioners, boilers, and ductless systems using premium products
Repair services that address performance issues quickly and restore comfort without unnecessary delays
Maintenance programs that monitor system health and catch small problems before they escalate
Free estimates on new systems to help you compare options and plan your next step with clarity
Connect with us to schedule an assessment or get a free estimate on a new system.
You'll know what to expect from the first conversation through final walkthrough.
Every job begins with a clear assessment of your system's condition and your comfort goals. We listen carefully, answer your questions, and outline what the work involves so you can make informed decisions without pressure or guesswork.
John Lock Air Conditioning & Heating Service, Inc. prioritizes quality work and customer service at every stage. Whether you're considering a new installation, scheduling a repair, or planning seasonal maintenance, we're focused on delivering results that hold up over time and meet the standards you deserve.
Reach out to discuss your home's heating and cooling needs and explore available options.
Trust Three Generations of HVAC Expertise
Premium products delivered at fair prices with quality work you can count on.
Built on Accountability and Craftsmanship
John Lock Air Conditioning & Heating Service, Inc. has operated in Western New York for more than eight decades because we've stayed focused on doing the work right. As a Lennox certified dealer, we're held to high standards in product knowledge, installation protocols, and ongoing training—standards that align with our own expectations for every project we take on.
We approach each job as an opportunity to demonstrate the kind of reliability and professionalism that builds long-term relationships. You're not just a transaction on a schedule. You're a neighbor, a homeowner, and someone who deserves equipment that performs and service that stands behind it. That's the foundation we've built on, and it's what we bring to your door every time.
Get in touch to start a conversation about your heating and cooling system.