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

We are so happy we started with Donnelly's in 2019 after issues with a soaked basement due to hot water heater and then a brand new sump pump failure 3 weeks later. We could not stay with the previous company. Donnelly's workers are very skilled, thorough and professional, explaining everything and giving great advice on what is best. We had Shane come a couple days ago to fix a leak with our heating unit and Ed today for spring maintenance. They both did an excellent job!!! I'm also very thankful for the contract we have with Donelly's, it does save us money.

Jennypie

5 days ago

Tom did a superb job. I had so many plumbers that did not want to touch the wall hung toilet. It had a couple issues of being outdated and hooking the plumbing to the back of the toilet. Tom did a perfect job. Very pleased with everything. Good job

Scott stitt

5 days ago

It's a frightening experience when a Heating/Cooling system needs to be replaced. Toilets are flushing. Shower is flowing. Fortunately Donnelly Plumbing and HVAC have knowledge, experienced and compassionate employees. Thank you for your expeditious service. Toilet replaced today, 07/07/25

denise richardson

5 days ago

Brandon was excellent. Took pictures and videos of before and after. Showed me the before and after numbers. Extremely professional in every way. Explained everything in a logical and easy way to understand.. Donnelly installed my unit almost 5 years ago and it just needed some normal wear and tear maintenance. Would highly recommend Brandon and Donnelly.

Gary Bonitatibus

5 days ago

Thank You so much for taking care of my Heater Replacement. Darryl was very professional and did a great job of explaining the issue to me regarding the need for a replacement heater. Wade was so great at working the numbers to fit into my budget so that the replacement would happen before the winter arrive. And Evan and his partner did a great job in a very timely manner to complete install. I am so happy Donnelly’s is my Heating and A/C service company. This company is really great and employ every professional technicians. I am a very happy customer.

Susan Lynam

6 days ago

Read Our Reviews