HVAC Services You Can Count On All Year

Choose Haller for HVAC services in Fullerton, 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 Fullerton’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 caring for Fullerton homes. Generations of local families have relied on us for their furnaces, air conditioners, heat pumps, and boilers. With our trucks covering Lehigh County daily, we reach you quickly. Your heat goes out at midnight or your AC quits on a Sunday afternoon? We pick up the phone and send a technician right away.

Emergency Service

HVAC Systems Serviced

Drains Cleared

Years in Business

Trucks on the Road


4.7
Based on 8837 reviews
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Carrier Residential Factory Authorized Dealer
North American Technician Excellence - NATE - Certifying the Finest in HVACR

Fullerton’s Trusted HVAC Service Provider Since 1981

We answer the phone, show up on time, and explain what’s wrong before we start any work.

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

(717) 204-8120


Why Fullerton 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, whether you 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, and neither do we. Our 24/7 emergency services help Fullerton homeowners get fast, dependable help when it matters most.

We’ve proudly served Central and Eastern Pennsylvania since 1981, bringing decades of experience to every job. 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’ll come back and fix it.


Our Easy, 3-Step HVAC Scheduling Process

Getting HVAC services in Fullerton with Haller is simple and convenient. Call today to schedule your heating or cooling service.

Dealing with an urgent issue or planning a home upgrade in Fullerton? 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 so 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 2587 reviews
Had our power lines to the house taken down during a big storm, the folks at Haller were great at getting out quickly to check out the damage and give us an estimate to repair. We put a down-payment down to reserve service, ended up not needing them, and they promptly refunded our payment with zero fuss. Good experience, I recommend them
Highly recommended. On time, courteous and friendly! Carl was an excellent Hvac mechanic. A+++
We are 20 years plus customer with Haller. They never let us down when it comes to service and repairs. Our central air / heat or electrical . Thank you Matthew who is knowledgeable in his profession. Thank you for fixing the outlet and restoring power and lights . Thanks Haller . Keep up the good work .
Very professional and helpful
7/9/26 Carl Horning was magical as usual. Brilliant, all knowing, covers every base and has an unbelievable skill base that canโ€™t be compared to.
Technician knowledgeable and professional. Completed work effiently and in a timely manner. Found issue after going through some steps to eliminate potential issues. Technician explained issue and what to watch for regarding it happening again.
John was very thorough and informative.
From Haller doing a routine check on my HVAC and noticing the the water heater leaking to the estimate to scheduling the replacementโ€ฆ then having to change the appointment because of leaving for a vacationโ€ฆ. Courtesy, professional, and the Plummer that did the job Shane was seriously great. Iโ€™m thankful.
The service was extraordinary. My service person was polite, informative and customer centric. This person is the type of person you want engaging with people. I also learned some good ac and furnace tips. I give Shane 5 stars….out of 5.
Nate was very nice to work with and very professional.
Garage toilet replacement.
Opted to provide own fixture and Haller requested for install. Mark Habbershon did a great job in removal, prep work, install, test & cleanup. . Confirmed improved trap dimensions for the new unit and much less likely to clog like old toilet with narrower trap. Very friendly and eager to do a quality job! Bravo Mark!!
Repair man was amazing nice and kind , unfortunately it was on the 4th of July and the rates were a lot higher ! But the repair man was great would highly recommend
Excellent experience with Shane Keifer on water heater installation. In addition a shout out to Amanda for helping get us booked in a very timely and friendly manner.
Christopher is wonderful and came out quickly . He is very professional and friendly. He took care of my central air and resealed the unit in the house. Closed the vents that are not being used to keep the cold air where I needed it. I would ask for Christoper the next time I had an issue.
Haller is best.
The technician, Adam, was excellent. He explained what the problems were, and showed me the problems on my outdoor fan. He was very patient and polite. I am hard of hearing, so he spoke louder. He fixed everything, and thought of solutions that had not been mentioned to me before – like using a 2" filter instead of a 1" filter to possibly cut down on filter changes (since I cannot change them myself). He also explained how the $24/month plan worked, and set me up for that when I decided to go with it. He answered all my questions. Adam is an excellent Haller employee.
Prompt competent, courteous service
Tech Nevin top notch w/ customer service. Extremely thorough.
Adam B was really amazing to have service my AC unit. He explained things thoroughly and completed everything in a timely fashion. Future services will request him.
Excellent service
Service tech, Phil R. arrived as scheduled, diagnosed the problem quickly and replaced the part on the spot. Thank you Phil for your professionalism and your kind, personable service.
He did an excellent job. ๐Ÿ‘ He is very friendly and kind.
My air conditioner was repaired by Neffsville, but it failed again in just over a month. When it stopped working, I was told it would be four days before they could come back out (itโ€™s 101 degree outside!).

I called Haller Enterprises instead, and they had a technician at my home within 24 hours. Jesse B. was knowledgeable, professional, and took the time to explain the issue and the repair. He diagnosed the problem quickly and completed the repair efficiently.

The difference in responsiveness and overall service was night and day. Based on my experience, I highly recommend Haller Enterprises for your HVAC needs. Thank you, Jesse, and the Haller team, for taking great care of us!
Adam B. came out on an extremely hot day and got the air fixed up and running well as soon as they got my call. He was very polite and friendly and explained everything he needed to do. I would highly recommend the company.
Very professional and tells you exactly what is going on. Highly recommend.

Homeowner greeting Haller technician at the door for maintenance

Stay Ahead of HVAC Issues with the Home Comfort Club

Maintaining your HVAC system in Fullerton 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, protecting your comfort throughout the year.

Priority scheduling comes automatically with your Home Comfort Club membership, particularly during Fullerton’s brutal winter cold snaps or sweltering summer heat waves. During peak heating and cooling seasons, you won’t find yourself waiting in line for service. Members get moved to the front of our schedule whenever possible. This priority treatment is just another way we put your family’s needs first.

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 Fullerton HVAC Services

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

Haller provides expert HVAC services in Fullerton, 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 Fullerton 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 Fullerton upgrades your home with modern, energy-efficient cooling.
Furnace

Furnaces

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

We service and install high-performance furnace systems built to handle Fullerton’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 Fullerton 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 Fullerton 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 Fullerton’s variable 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 Fullerton 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 with thorough inspections and performance checks.
  • Heat Pump Replacement: Is your heat pump aging or underperforming? Heat pump replacement in Fullerton 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 Fullerton.

Perfect for additions, older homes, 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 via refrigerant lines. Minimal construction required compared to adding ductwork.
  • Ductless Mini-Split Repair: If your ductless system isn’t working properly, we diagnose the issue and provide reliable ductless repair in Fullerton. We’ll restore efficient heating and cooling.
  • Ductless Mini-Split Maintenance: Regular ductless maintenance keeps your system running at peak efficiency. This includes filter cleaning, coil inspection, and refrigerant checks.
  • Ductless Mini-Split Replacement: When your ductless system is outdated or struggling to keep up, we provide expert ductless replacement in Fullerton with modern, energy-efficient units.
Boiler

Boilers and Radiant Heating

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

Whether you rely on a traditional or high-efficiency boiler, we handle repairs, maintenance, and installations. Our technicians make sure your system runs safely and efficiently through 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 Fullerton homes.
geothermal heating icon

Geothermal

Geothermal heating systems offer sustainable, energy-efficient comfort.

By using the earth’s natural energy, geothermal systems provide consistent heating and cooling with lower operating costs. We design and service geothermal solutions near Fullerton 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. This includes removing old equipment, coordinating gas line work, and installing your new furnace or boiler. Many Fullerton 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 Fullerton 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 measurable 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 Fullerton. You can work with one team you trust instead of juggling multiple contractors.


Schedule Your Fullerton HVAC Services with Haller Today

When you 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 Fullerton homeowners trust.

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

Male Haller tech with tool bag entering residential home smiling.


Frequently Asked Questions

What HVAC services does Haller provide?

Haller provides complete heating and cooling services in Fullerton, from emergency repairs to full system installations and regular maintenance. We service all types of equipment including furnaces, heat pumps, boilers, and ductless mini splits. Whether your system breaks down in the middle of a Pennsylvania winter or you’re planning an upgrade, our technicians handle everything needed to keep your home comfortable through every season.

How often should I schedule HVAC maintenance?

Your heating system needs professional attention once yearly, typically before winter starts. Your cooling equipment needs the same treatment before summer arrives. Regular maintenance visits catch small problems before they turn into expensive repairs. They keep your equipment running efficiently through Fullerton’s temperature swings. Most systems last much longer when they get consistent professional care. You’ll notice better performance and lower energy bills throughout the year.

Do you offer 24/7 emergency HVAC services?

Yes, we provide emergency HVAC 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 10-15 years old that need regular fixes are usually better candidates for replacement. Same goes for units that can’t keep your home at a steady temperature. Age becomes especially important here in Fullerton where your HVAC system works hard through both cold winters and humid summers. Our technicians check your current equipment’s condition, efficiency ratings, and repair history. We’ll give you straightforward advice about whether fixing or replacing makes more financial sense for your situation.

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 here in Fullerton where systems work hard through both winter heating and summer cooling seasons. 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 helps. Pairing it with a programmable thermostat increases those savings. You can often reduce monthly energy costs by 20-30% or more.

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