HVAC Services You Can Count On All Year

Choose Haller for HVAC services in Cornwall, and you get repairs, installations, maintenance, and 24/7 emergency service for every type of heating and cooling equipment.

Heating and cooling systems work overtime during Cornwall’s harsh winters and sticky summer months. You deserve a team that arrives promptly, communicates clearly about the problem, and restores your home’s comfort.

Since 1981, we’ve been serving Cornwall families with dependable care for their furnaces, air conditioners, heat pumps, and boilers. Generations of local homeowners have relied on our expertise. With hundreds of vehicles on the road, we reach you quickly.

Emergency Service

HVAC Systems Serviced

Drains Cleared

Years in Business

Trucks on the Road


4.7
Based on 9154 reviews
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Carrier Residential Factory Authorized Dealer
North American Technician Excellence - NATE - Certifying the Finest in HVACR

Cornwall’s Trusted HVAC Service Provider

Your heat fails at midnight? Your AC stops working on Sunday afternoon? We pick up the phone and send out a technician.

Our team is easy to schedule with and easy to reach, so you’re never left waiting or wondering. Every HVAC service in Cornwall is backed by our 100% satisfaction guarantee.

(717) 204-8120


Why Cornwall Homeowners Choose Haller

Your safety is our top priority on every job, from small repairs to full system installations. We follow strict standards and best practices to make sure your home’s systems operate safely and efficiently.

We make scheduling simple and convenient. Call us or book online. Our responsive team keeps you informed every step of the way so you’re never left guessing.

Home emergencies don’t wait. Neither do we. Our 24/7 emergency services give Cornwall homeowners fast, dependable help when it matters most.

We’ve proudly served Central and Eastern Pennsylvania since 1981, bringing decades of experience to every job. From Quentin to Miners Village and surrounding communities, we help homeowners stay comfortable through every season with HVAC solutions built for how people actually live here.

We offer a range of financing options that make it easier to move forward with necessary repairs or system upgrades. With flexible payment solutions, you can improve your home’s comfort without unnecessary financial strain.

Our NATE-certified technicians bring advanced training and proven expertise to every service call. As a BBB Accredited Business and Carrier Factory Authorized Dealer, we meet high standards that give you added confidence in our work.

Our Home Comfort Club provides preventative maintenance, priority scheduling, and exclusive member savings. It’s a proactive way to protect your home’s systems and enjoy greater peace of mind year-round.

Every HVAC job comes with our 100% satisfaction guarantee. Something isn’t right? We come back and fix it.


Our Easy, 3-Step HVAC Scheduling Process

Getting HVAC services in Cornwall with Haller is straightforward and built around your schedule.

Dealing with an urgent issue or planning a home upgrade in Cornwall? We make it easy to get the professional help you need without added stress.

Call us or schedule your appointment online at a time that works best for you. Our friendly team will gather a few details about your home and service needs to make sure we’re fully prepared.

Our licensed technician will arrive on time, assess the situation, and explain your options clearly. We provide honest recommendations and upfront information so you can make a confident decision.

Once you approve the work, we complete the job with a focus on safety, efficiency, and long-term performance. You can relax knowing your service is backed by our 100% satisfaction guarantee.

(717) 204-8120


What Our Customers Are Saying

Learn More About Our 100% Satisfaction Guarantee

4.7
Based on 2637 reviews
David Acaster
6 hours ago
We had been having air conditioning issues for a couple years where we had to fix it multiple times a year. We discussed the issues with our current air conditioning repair company who said the problem was the ac was getting near end of life and was struggling to keep the house cool when it got hot out. We asked them to give us a quote to replace the system. The person who came out only wanted to sell us on heat pumps and a lower quality air conditioner than what we had. So we contacted Haller to come out to give us a second opinion. One of their sales people ( Alex Steffy) came out looked at our current system and provided us with a variety of options to address our issue. He was very professional knowledgeable and polite. He explained why we had issues and how we should possibly remedy them. He provided 3 separate quotes outlining exactly what what equipment we would be getting and the cost for each option. The installation was done quickly and professionally by two gentlemen. The even offered a 5 year warranty though Haller in addition to the 10 year warranty by carrier. They may be a bit more expensive but I believe the service and care your get from them is worth the extra money.
Fred Tiny
10 hours ago
We had an issue with what looked like a tiny drip in the basement, but Nathan who was amazing (friendly, caring and very professional) spent the necessary time checking out all the area. He found a bird had built a nest in the dryer outside vent causing this crazy scenario. He found it and fixed it that same day. 100% satisfied from this service.
Katherine Heisey
13 hours ago
The technician , Christian S. , was very prompt and solved our issue !
Heather Magrecki
13 hours ago
1 – I can't believe how fast and easy it was to get an appointment. 2 – I love that they confirm the apt. 3 – I appreciate that they sent a text with the ETA of the technician, let me track how soon he'll be here so I can prepare the dogs, and give me a picture of what he'll look like. That is awesome. 4 – got us up and running again in record fast time. I completely and totally recommend Haller!!
CHRISTIAN Dahme
2 days ago
Quick, friendly and inexpensive! I was so pleasantly surprised with this company! Thank you so much Shane!
Albert Dodson
2 days ago
Incredibly detailed inspection and service of the equipment. Best ever
David Levens
5 days ago
Outstanding service, price was way to high
Brandon Sandy
5 days ago
Chris was very knowledgeable and professional during my sewer pump repair. I would recommend Chris and Haller to anyone needing this service.
Barbara Conway
6 days ago
Our service was completed thoroughly and professionally. Westley was knowledgeable, respectful, and courteous. We were left feeling our maintenance service had been completely very efficiently.
Thomas Conway
6 days ago
Great prompt service. Very polite and efficient!
C Betz
7 days ago
Very professional and did a great job explaining the situation.
Cat Tetley
1 week ago
Scheduled an estimate for what we thought would be a complicated fix. Arrived on time, pleasant, thoroughly assessed the situation, made his professional recommendations, and didnโ€™t try to upsell me on any extra repairs that werenโ€™t urgent, and actually let us know that the wiring situation didnโ€™t require an expensive replacement or re-wiring, just someone comfortable with that specific wiring and hardware layout. Would call them again.
Mike Lutz
1 week ago
Nicholas examined the damage, informed me of the required action and the initial cost for the leak detection, Then he proceeded to explain what he needed to do. He went about his business competently and efficiently. He maintained good communication during and after his work.
Shane was amazing! not only competent, but great with which to work. Super happy.
Robert Schwartz
1 week ago
Mark came and adjusted the setting on our water softener that were effected by a power outage in our area. He was prompt, pleasant and explained how things were done.
Jeff Thornton
1 week ago
Jason from Haller-Electric did a great job troubleshooting an issue in our old home. Quickly diagnosing our issue and solving our problem, and he did so with a positive, conscientious and professional attitude. Well done and thanks!
Shawn was excellent as diagnosing a problem that was not previously identified by other technicians. He explained it very clearly and was doing so in our best interest. He was not pushy or come off as โ€œa salesmanโ€, just letting us know what the issue was. I will definitely be requesting him to do all future maintenance and repairs!
Debbie Stover
2 weeks ago
Excellent service and explained options very well! Professional across the board!
Kelly Good
2 weeks ago
The technician was very helpful and provided information to assist me if I had problems in the future with my smoke detectors.
Jean Gibb
2 weeks ago
We were very pleased with the great job that the haller guys did in repairing the water leaking problem that we had with our split.
Steve Lazun
2 weeks ago
Jesse is extremely knowledgeable. He diagnosed the problem with my AC that others had missed.
John Brown
2 weeks ago
Excellent knowledge and service. He chose the correct fix out of 2 possibilities causing the problem.
Alison Woo
2 weeks ago
Haller has a solid offering overall and I like they have many different disciplines. Jesse Brubaker did a great job doing my semi-annual review of my key machines including two air conditioners and a water heater. Excellent work all around!
Jo-ann R.
2 weeks ago
The technician, Eric , called in the morning of my ac and furnace installation to let me know he was on his way. Upon arrival he and Connor reviewed the process for the day and layed down plastic to prevent damage to my floors. Another gentleman joined them at some point to complete the job. overall very satisfied with courteousness and professionalism. Haller came recommended and would do the same for anyone looking for installation or yearly maintenance services.
Andrew Peterman
2 weeks ago
I used Haller Enterprise to replace some plumbing and was very pleased.

Homeowner greeting Haller technician at the door for maintenance

Stay Ahead of HVAC Issues with the Home Comfort Club

Maintaining your HVAC system in Cornwall becomes simple, affordable, and stress-free with the Haller Home Comfort Club. Proactive service and exclusive member benefits help you stay ahead of problems rather than reacting to unexpected breakdowns. Your comfort stays protected throughout the year.

Priority scheduling comes automatically with your Home Comfort Club membership. This matters during Cornwall’s peak heating and cooling demands. During those extreme temperature swings that hit our area, you skip the waiting line for service calls. Members get moved ahead in our schedule whenever we can make it happen. Faster comfort restoration for your home. Your family’s comfort becomes our priority in every way possible.

Routine maintenance is the key to avoiding costly breakdowns and extending the life of your equipment. With scheduled tune-ups included in your membership, we inspect, clean, and optimize your systems for safe and efficient operation. This proactive approach helps catch small issues before they turn into major repairs. You’ll enjoy more reliable performance and improved energy efficiency throughout the year.

Home Comfort Club members receive special discounts on repairs and services, making it easier to manage household maintenance costs. Over time, those savings can add up significantly, especially if unexpected issues arise. You may also gain access to seasonal promotions and member-only offers. It’s a smart investment that delivers value well beyond routine service.

With the Home Comfort Club, you build an ongoing partnership with a team that understands your home’s systems. We keep detailed service records and provide personalized recommendations based on your equipment’s condition and performance. Backed by our commitment to safety and 100% satisfaction guarantee, you can feel confident that your comfort is always protected.

Schedule home system maintenance by calling (717) 204-8120.


Your Choice for Cornwall HVAC Services

Keeping your home comfortable in every season requires heating and cooling solutions you can rely on.

Haller provides expert HVAC services in Cornwall, delivering dependable repairs, energy-efficient installations, and preventative maintenance designed to keep your system running safely and efficiently year-round.

(717) 204-8120

Cooling Icon

Air Conditioning

Pennsylvania’s humidity makes AC failures miserable fast. We keep cooling systems running through the worst of summer.

We service central air conditioners, ductless systems, and heat pumps in cooling mode. Common issues include refrigerant leaks, compressor failures, frozen coils, and electrical problems.

  • AC Repair: Fast AC repair in Cornwall restores comfort quickly when your system isn’t working right.
  • AC Installation: We install high-performance AC systems built for reliable, energy-efficient cooling.
  • AC Maintenance: Professional AC maintenance helps prevent breakdowns and improves efficiency.
  • AC Replacement: Expert AC replacement in Cornwall upgrades your home with modern, energy-efficient cooling.
Furnace

Furnaces

Dependable furnace services keep your Cornwall home warm and safe during winter.

We service and install high-performance furnace systems built to handle Cornwall’s coldest temperatures. Need maintenance, repair, or a full replacement? We make sure your system operates safely and provides consistent heat.

  • Furnace Repair: Prompt furnace repair in Cornwall restores reliable warmth when your system won’t ignite, heats unevenly, or makes unusual noises.
  • Furnace Installation: We guide you through selecting the right furnace for your home. Then we handle installation with precision and care.
  • Furnace Maintenance: Routine furnace maintenance keeps your system running efficiently. It also helps you avoid unexpected breakdowns during the coldest months.
  • Furnace Replacement: Professional furnace replacement in Cornwall improves comfort and lowers energy bills. You’ll get more dependable performance all winter.
Heat Pump

Heat Pumps

Heat pumps handle both heating and cooling. This makes them a practical choice for Cornwall’s changing climate.

Modern cold-climate heat pumps stay efficient even when temperatures drop into the 20s. We install air-source and ground-source systems.

  • Heat Pump Repair: Heat pump repair in Cornwall covers refrigerant issues, defrost cycle problems, reversing valve failures, and compressor diagnostics.
  • Heat Pump Installation: We design and install heat pump systems tailored to your home’s layout and efficiency goals.
  • Heat Pump Maintenance: Routine heat pump maintenance keeps your system running efficiently. It also extends its lifespan through thorough inspections and performance checks.
  • Heat Pump Replacement: Is your heat pump aging or underperforming? Heat pump replacement in Cornwall with a modern system improves comfort and lowers energy costs.
Ductless system

Ductless Mini-splits & VRFS

Ductless mini splits provide flexible, zoned comfort for homes in Cornwall.

They’re perfect for additions, older homes near the Historic Miners Village, or rooms without ductwork. These systems let you control temperatures independently. We install and service ductless systems to improve comfort and efficiency.

  • Ductless Mini-Split Installation: Wall-mounted indoor units connect to an outdoor compressor through refrigerant lines. Much less construction needed compared to adding ductwork.
  • Ductless Mini-Split Repair: If your ductless system isn’t working properly, we’ll diagnose the issue. Then we provide reliable ductless repair in Cornwall to restore efficient heating and cooling.
  • Ductless Mini-Split Maintenance: Regular ductless maintenance keeps your system running at peak efficiency. We clean filters, inspect coils, and check refrigerant levels.
  • Ductless Mini-Split Replacement: When your ductless system is outdated or struggling to keep up, we provide expert ductless replacement in Cornwall with modern, energy-efficient units.
Boiler

Boilers and Radiant Heating

Professional boiler services provide steady, consistent heat for your Cornwall home.

Whether you rely on a traditional or high-efficiency boiler, we handle repairs, maintenance, and installations. Our technicians ensure your system runs safely and efficiently through the winter.

  • Radiant Heating: In-floor and baseboard radiant systems deliver heat without blowing air. No drafts. No dust circulation. We install and repair radiant heating systems in Cornwall homes.
geothermal heating icon

Geothermal

Geothermal heating systems offer sustainable, energy-efficient comfort.

These systems use the earth’s natural energy to provide consistent heating and cooling with lower operating costs. We design and service geothermal solutions near Cornwall for homeowners looking for long-term savings and environmental benefits.

Furnace

Oil-to-Gas Conversions

Converting from oil heat eliminates tank maintenance and often lowers fuel costs.

We handle the full conversion process. We remove old equipment, coordinate gas line work, and install your new furnace or boiler. Many Cornwall homeowners have made the switch as natural gas availability has expanded.

Indoor air quality

Indoor Air Quality Solutions

Dry winter air and humid summers both affect comfort and health in Cornwall homes.

We install whole-house humidifiers, dehumidifiers, air purifiers, and filtration systems that work with your existing HVAC equipment.

Smart Thermostat Icon

Thermostats & Smart Home Devices

The right thermostat reduces energy waste and makes your system easier to control.

We install Wi-Fi thermostats, programmable thermostats, and multi-zone controls. Proper placement and programming make a real difference in efficiency.

Haller Technician Helping customer with Memberships

Other Home Services from Haller

Your heating and cooling system is just one part of what keeps your home running. Haller also provides plumbing, electrical, and indoor air quality services throughout Cornwall. You can work with one team you trust instead of juggling multiple contractors.


Schedule Your Cornwall HVAC Services with Haller Today

Need dependable heating and cooling solutions backed by decades of experience? Haller Enterprises is ready to deliver. From repairs and replacements to maintenance and indoor air quality upgrades, we provide the complete services Cornwall homeowners trust.

Call or contact us online to schedule Cornwall HVAC services today!

Male Haller tech with tool bag entering residential home smiling.


Frequently Asked Questions

What HVAC services does Haller provide?

We handle all types of heating and cooling work in Cornwall. Emergency repairs to complete system installations to regular maintenance visits. Our technicians service furnaces, heat pumps, boilers, ductless mini splits, and central air systems throughout the area. Whether your system breaks down during a Pennsylvania winter or you’re planning an upgrade, we provide the full range of HVAC services to keep your home comfortable through every season.

How often should I schedule HVAC maintenance?

Your heating system needs professional maintenance once yearly, ideally before winter starts. Your cooling system needs the same attention before summer arrives. Regular tune-ups in Cornwall catch small problems before they turn into expensive repairs. This is especially important given our temperature swings from humid summers to freezing winters. These visits also keep your equipment running well, which means lower energy bills and fewer middle-of-the-night breakdowns when you need your system most.

Do you offer 24/7 emergency HVAC services?

Yes, we provide emergency HVAC services for urgent heating and cooling issues. If your system stops working during extreme Pennsylvania temperatures, we respond quickly to restore comfort and safety.

How do I know if I should repair or replace my HVAC system?

Systems approaching 10 to 15 years old that need constant repairs or can’t keep your home at a steady temperature are usually better candidates for replacement. Age becomes especially important in Cornwall where our heating systems work hard through cold winters and cooling systems battle humid summers. When repair costs start adding up and your equipment can’t maintain comfort reliably, a new system typically saves money over time. Plus, you’ll get dependable performance.

Can a new HVAC system help lower my energy bills?

Modern HVAC systems can cut your energy bills substantially compared to older equipment. This is especially true in Cornwall where systems work hard through cold winters and humid summers. Today’s high-efficiency units use advanced technology that wastes far less energy than systems from even 10 years ago. Getting the right size system for your home and pairing it with a programmable thermostat increases those savings. You’ll often see monthly costs drop by 20% or more.

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