Air conditioning on Cape Cod

Repairs, replacements, and maintenance for reliable summer comfort.

Air conditioning mini split

Keep your home comfortable all summer long

When the Cape heats up, a reliable air conditioning system makes all the difference. We service, repair, and replace AC units in homes and commercial properties. Whether your system isn’t cooling properly, making noise, or due for an upgrade, we’ll take care of it with the right tools, clean work, and honest advice.

AC service we can help with

  • AC troubleshooting and repairs

  • Full system replacements

  • New AC unit installations

  • Mini-split system installs

  • Thermostat upgrades

  • Seasonal maintenance and cleaning

  • Efficiency checks and filter changes

  • Refrigerant recharge and diagnostics

    and more

Air conditioning help from people who know the Cape

We handle repairs, replacements, and new installs with clean work and clear communication. Whether it’s a small fix or a full system upgrade, we make sure your AC is ready for the season.

We serve homes and businesses in Harwich, Dennis, Chatham, Brewster, Yarmouth, and nearby towns on Cape Cod.

Good words from happy customers

  • ★★★★★

    When I called and explained my problem, Bill answered and responded very quickly. When Bill and Vinny arrived (on time), they were polite, answered all my questions, explained what they were doing, and took pride in their workmanship. I highly recommend Dunphy Plumbing & Heating.

    – K. Mason

Common questions about air conditioning

  • We service most major brands, including central air systems, mini-splits, and ductless units. If you’re not sure what you have, we’re happy to take a look.

  • Ideally once a year, before the summer season. Regular maintenance helps prevent breakdowns and improves energy efficiency.

  • Yes. Mini-splits are a great option for older homes without ductwork. They’re quiet, efficient, and allow for zoned cooling.

We serve expert plumbing and heating services on Cape Cod, including:

Need help with your air conditioning?

Call (508) 243-1946 or send a quick message. We’ll get your system working smoothly so you can stay cool.