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Furnace Repair & Replacement in the Greater Philadelphia Area

Homeowners in the greater Philadelphia area know how important a reliable furnace is to stay comfortable and safe through our long, frigid winters. At Donnelly’s Cooling, Heating & Plumbing, we understand, which is why we offer comprehensive furnace services and exceptional customer support. 

With Donnelly’s Cooling, Heating & Plumbing, you can always expect integrity, honesty, and transparency. Our experienced technicians can handle any problems you encounter with your furnace.

Need furnace services in the Greater Philadelphia area, PA? Contact Donnelly’s Cooling, Heating & Plumbing today to schedule an appointment.

Furnace Installation & Replacement

The Donnelly’s Cooling, Heating & Plumbing team can help when it’s time to install or replace your furnace. We offer a variety of furnace products to meet your specific needs and budget.

With our top-quality products and work, we can ensure your new furnace is installed correctly and can provide years of reliable heating. You can count on us when you need furnace replacement or furnace installation in Montgomery County.

Furnace Repair

Greater Philly winters will put your furnace through a lot of wear and tear over the years. Even reliable furnaces can eventually break down or require parts replacements. Rely on Donnelly’s Cooling, Heating & Plumbing for thorough and prompt furnace repairs.

Our highly trained technicians are ready to help you resolve your furnace problems. We provide expert repairs at affordable prices.

Signs Your Furnace Needs Repair

Is your furnace malfunctioning? Don’t wait to get help. Some signs you need furnace repairs include:

  • Insufficient heating: If you notice your home isn’t staying warm enough or reaching the temperature you set on the thermostat, your furnace may need repair.
  • Short-cycling: If your furnace frequently turns on and off but still doesn’t reach your desired temperature, it may need professional repairs.
  • Yellow pilot flame: The pilot light should always be burning blue. If it’s yellow or orange, your furnace may be emitting carbon monoxide, which is dangerous and requires immediate repair.
  • Loud noises: Loud clanging or grinding noises could mean a loose part needs to be repaired or replaced before it causes further damage to your system.
  • Bad smells: A rotten egg odor means your furnace is leaking carbon monoxide, which is always an emergency. Turn off your furnace and leave your home immediately before calling us for emergency repair.

If you notice these or any other issues with your furnace, contact Donnelly’s Cooling, Heating & Plumbing for prompt, long-lasting repairs.

Furnace Maintenance

Annual, professional maintenance delivers immediate and long-term benefits for your furnace and your home’s comfort. We’ll clean, lubricate, and check your furnace and its components so you can enjoy cleaner air and more reliable heat all winter.

Furnace maintenance also extends the lifespan of your furnace, reduces your chance of needing repairs, lowers repair costs, and keeps your furnace’s warranty intact. It’s best to schedule maintenance at the end of summer or early fall, so our experts can make minor repairs and confirm your system works correctly and efficiently before you need it.

Gas vs. Electric Furnaces

Gas and electric furnaces each have pros and cons, so it’s best to know the differences before installing or replacing your home’s furnace.

Gas furnaces: These typically cost less to run, although gas prices tend to fluctuate more over the years. They also heat more cleanly and quickly than electric furnaces.

Electric furnaces: The main benefit of an electric furnace is that you’re not using combustible fuel, so there’s no risk of gas leaks if the system malfunctions or fails. Electricity is typically more expensive, though, and the dry heat produced can irritate allergies for some people.

Choose Donnelly’s Cooling, Heating & Plumbing for Furnace Service in Montgomery County

For over 50 years, Donnelly’s Cooling, Heating & Plumbing has helped Montgomery County families keep their homes warm through freezing winters. You can count on us for reliable, top-quality solutions to keep your family comfortable all season.

Contact us online today to request expert furnace services in the Greater Philadelphia area or surrounding areas.

Furnace FAQs


You can expect most new furnaces to last 15 to 20 years as long as you keep up with annual professional system maintenance.

Professional furnace maintenance should be performed yearly, preferably in late summer or early fall, before you need to rely on your system again through winter.

Yes! It’s important that you clean or replace the air filters, which should be done at least every three months, but possibly more often if you have pets or smokers in your home. You can also keep the area around your furnace and air vents clear of clutter or debris to prevent damage or blockages.
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See What Your Neighbors Are Saying

We were extremely satisfied with the service provided by Donnelly’s. From start to finish, they were extremely professional and kept us informed every step of the way. Our technician, Mike Wilson, was fantastic. He was very knowledgeable and courteous. We were very happy with the project…

Anthony M.

Anthony M.

Donnelly’s Heating, Cooling & Plumbing provided excellent service for our home. Domingo C. was very knowledgeable and answered all of my questions (and there were many!). We ended up with an issue, and he stayed until it could be resolved. Jake H. and his skilled team…

Jill C.

Jill C.

Can’t say enough about how great my water heater replacement experience was. Service tech, Joe was the best; Knowledgeable, professional, and kind - he did such a great job. I highly recommend contacting Donnelly’s for your plumbing needs.

Kristen T.

Kristen T.

All around good experience for the installation of a combi boiler. The sales process was good and they were willing to negotiate which was appreciated. I set up the install two weeks out at the time of the sale and they arrived on time today to…

Todd A.

Todd A.

Our whole experience with Donnelly's was spectacular. We really appreciated the honesty and clarity throughout the whole process. When they came out for a quote we felt like all of our questions were answered and their proposal gave us exactly what we needed at a very…

Racheal B.

Racheal B.

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What To Expect

Discover the Donnelly’s Difference

​Professional Services​

​We show up on time, keep things clean, and listen to what you need. We treat you and your home with the respect it deserves.

Service for All Brands

​We can work on all makes and models of HVAC and plumbing equipment.​

Trustworthy

​You can count on us to be honest and always do what we say. We communicate clearly, provide our guarantees & warranties in writing, and ensure you understand everything we're doing in your home.​

Experienced Technicians​​

We excel at solving problems with years of experience behind us. We look at today's challenges and future needs to create the best customized solutions.​

Licensed & Insured

​Our technicians are licensed, insured, and background-checked for your peace of mind.​

​Professional Services​

​We show up on time, keep things clean, and listen to what you need. We treat you and your home with the respect it deserves.

Service for All Brands

​We can work on all makes and models of HVAC and plumbing equipment.​

Trustworthy

​You can count on us to be honest and always do what we say. We communicate clearly, provide our guarantees & warranties in writing, and ensure you understand everything we're doing in your home.​

Experienced Technicians​​

We excel at solving problems with years of experience behind us. We look at today's challenges and future needs to create the best customized solutions.​

Licensed & Insured

​Our technicians are licensed, insured, and background-checked for your peace of mind.​