Donnelly's Cooling, Heating & Plumbing

Home Comfort Specialists Since 1972

Serving Montgomery, Bucks, Chester, & Delaware Counties

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Cooling

Heating

Plumbing

Drain & Sewer

Trusted HVAC & Plumbing Services in the Greater Philadelphia Area

Five Decades of Local Service Excellence

Trust the home comfort specialists from Donnelly's Cooling, Heating & Plumbing when you have a broken AC, inefficient furnace, or leaky faucet. With over 50 years of experience, our family-owned and -operated company has the skills and tools to handle any home service you need. You can expect licensed and insured technicians to deliver prompt, reliable solutions that keep your home comfortable and functional year-round.

Air Conditioning Services

Stay cool and comfortable all summer with expert cooling solutions from Donnelly's Cooling, Heating & Plumbing . We'll repair your central air conditioner, heat pump, or ductless mini-split system if it’s not working properly. Your technician will walk you through your options if you want to install a new cooling system. We even offer free estimates on replacement AC units.

Heating Services

We understand how essential it is to have working heat during Pennsylvania winters. If your furnace, boiler, or heat pump struggles to keep you warm, turn to us for fast repairs. When your system needs replacing, we'll handle that, too. Our trained and experienced technicians are always available to provide quick and reliable service with honest, upfront pricing.

Plumbing Services

Clogged drains, burst pipes, running toilets, and other plumbing problems can bring your daily routine to a complete halt. Thankfully, our expertly trained plumbers are ready to help with any plumbing need you may have! We offer repair, replacement, installation, maintenance, and drain cleaning services to keep your home’s plumbing running smoothly.

Drain & Sewer Services in Lansdale

Donnelly's Cooling, Heating & Plumbing provides comprehensive drain and sewer services to keep your plumbing system running smoothly. Located in Lansdale, PA, our expert team is equipped to handle all your needs, from drain cleaning to hydro jetting.

We also handle both trench and trenchless sewer line repair and replacement, ensuring minimal disruption to your property. Our video camera inspections allow us to accurately diagnose issues and provide targeted solutions. Whether you need sewer line repairs due to tree root intrusion or sewer line installation for your property, you can trust us to deliver efficient and reliable service.

Call (215) 488-5170 now to schedule HVAC or plumbing services in Montgomery County, the Greater Philadelphia area, or surrounding areas.

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.

About Us

We are proud to Offer Affordable Financing Options!

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Our Reviews

See What Your Neighbors Are Saying

Duane repaired our ac unit on 7/11/2025. His repair followed his initial service where he identified problems and ordered the needed parts to repair our ac unit. The parts arrived on a Thursday afternoon and he was at our house early Friday morning installing the new parts. Duane is an outstanding service tech from Donnelly and he is knowledgeable and efficient. I give Duane 5 stars. Vince Sobocinski

Vincent Sobocinski

3 days ago

Five stars for Joe Albert, who oversaw the installation of a new HVAC system in my home a few months ago. PLUS, he recommended a different propane supplier than my current one, with an expected annual savings of about $2,000!! Thank you, Joe!!

Tom Rohrbaugh

3 days ago

09-JUL-2025 Oscar Sosa Salinas, our service tech, was dispatched for our shifting toilet that leaked water onto our bathroom floor as well as down into our basement. Bottom line, we decided to to have the entire toilet removed and a new one installed. Oscar gave us options to go buy one ourselves (1 yr store warranty) and he'd install it - or, he'd buy one through their supplier with a 3 or warranty and he'd install it. For us, that 2nd choice was well worth the expenditure. Oscar was very professional in his approach to our needs. Thanks so much, Oscar!

Audrey Rissmiller

3 days ago

quick response from Donnelly! Derrik was friendly and explained everything in detail. Great job as always!

Joe Sheehan

3 days ago

Jason did an excellent job of repairing my split AC units. I like that he was the same person that I had met when he came out to do the general servicing of my AC unit. I felt he was very thorough and took his time in getting everything completed and assuring that everything was working correctly

Debra Collins

3 days ago

Read Our Reviews