Commercial & Residential
HVAC Services
Serving South Central Pennsylvania Since 1979
Professional
HVAC & Commercial Refrigeration Services
Experienced, reliable, and honest are the core foundations of the HVAC services from Williams Service Company. For decades, we’ve been the HVAC company that homes and businesses trust in York, PA, and the surrounding areas.
At Williams Service Company, our focus is on your comfort. Day or night, we’ll be there to help solve problems, service systems, and restore your peace of mind.
Comprehensive
Service Offering for Businesses & Homes
Looking for an AC and heating company that does it all? Williams Service Company provides commercial and residential HVAC services for properties of all sizes. We operate with integrity, treating your home or business as if it were our own, and bring you energy-efficient solutions that last.
Have an HVAC issue that can’t wait? Our experienced technicians are here for you, 24/7. We arrive on time and are ready to diagnose and repair any issue your indoor climate system is experiencing.
Proactive
Maintenance Plans
Take care of your HVAC system with routine services from our maintenance plans. We offer tiered plans for commercial and residential properties, reducing stress on your system and ensuring long-term performance.
In-House
Ductwork Fabrication
Partner with a full-service heating and air conditioning company that can execute on custom ductwork and HVAC designs wherever you need them. We engineer and manufacture custom sheet-metal duct systems tailored to specific HVAC design requirements.
Trusted Commercial
Refrigeration Services
Ensure your business’s most critical refrigeration equipment is working around the clock with help from our professionals. We offer refrigeration services for commercial properties, industrial facilities, and restaurants, servicing chillers, air curtains, blast freezers, walk-in freezers, and more.
Custom Commercial
HVAC Designs
Invest in a commercial HVAC design for energy efficiency and enhanced comfort. Access our in-house design specialist for full design builds of HVAC commercial systems that meet your property’s unique heating and cooling needs.
Expert
Commercial Services
Keep your commercial property’s HVAC system working efficiently with our advanced equipment services. Our commercial HVAC division provides comprehensive system design, installation, diagnostics, and preventive maintenance for commercial heating and air-conditioning systems of all brands and sizes.
Expert Commercial Services
- Preventative Maintenance
- HVAC Repair
- HVAC Installation
- Power Wash/Spray Wash
- Roof Top Units (RTU)
- Design/Build Capabilities
- Indoor Air Handlers
- 24-Hour Emergency Service
- Indoor Air Quality
- Refrigeration
5-Star Reviews
See What Our Customers Are Saying
"Highly recommend! We had a major project involving the installation of a new boiler and the removal of the old one. Jeff and his team were incredible throughout the entire process - skilled, efficient...”
“Williams Service did an excellent job replacing my old HVAC system with a new Trane heat pump and furnace. They were very professional, knowledgeable, and a pleasure to work with...”
“My husband and I had a new furnace system installed yesterday, and we are beyond happy with the experience! The team arrived right on time, was incredibly polite, walked us through the entire process..”
Residential
Services To Optimize Comfort
Take care of your home’s most important energy investment with help from Williams Service Company. We bring years of residential HVAC experience in preventative maintenance, replacement, and repair services. We ensure proper airflow, system efficiency, and reliable temperature control year-round.
Our Residential Services Include
- HVAC Replacement
- HVAC Repair
- Preventative Maintenance
- Thermostats
- Duct Cleaning
- Furnaces
- Central AC Systems
- 24-Hour Emergency Service
- Indoor Air Quality
- Water Heaters Services
45+ Years
Of HVAC Excellence
Choose an air conditioning and heating company that genuinely cares about you. Williams Service Company has years of experience and stellar reviews to back up our claims of excellence.
We know you have numerous options when it comes to partnering with an HVAC company, but we go above and beyond to ensure energy-efficient, consistent indoor comfort.
We’re a Service-First Company
Find solutions to all your heating and cooling problems with our help. We focus on doing all we can to service your existing HVAC system before recommending replacement.
24/7 Emergency Service
Call us day or night for HVAC emergencies that can’t wait. We’ll be there for you with 24/7 emergency HVAC service to avoid system downtime at your property.
Upfront Communication. Honest Service.
Trust us to focus on transparent, honest communication. We’ll never try to upsell or push upgrades that you don’t need.
No Hidden Agenda, No Hidden Fees
Count on us for clear pricing and billing practices for what you’re quoted and the actual work completed, with no hidden fees.
Experience
Unmatched Indoor Comfort Today!
Partner with Williams Service Company for consistent, year-round indoor comfort for your commercial or residential property.
With decades of experience assisting locals in and around York, we’ve gained a reputation as the honest HVAC company serving South Central Pennsylvania. Contact us today!
©2026 Williams Service Company
All Rights Reserved
Privacy Policy
License: #PA013573
Web Design and Digital Marketing by RYNO Strategic Solutions.
©2026 Williams Service Company
All Rights Reserved
Privacy Policy
License: #PA013573
Web Design and Digital Marketing by RYNO Strategic Solutions.