HVAC Contractor in Cohasset, MA

Your Heating and Cooling Works Again

Fast, reliable HVAC service when your system fails and your family needs comfort most.

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Professional HVAC Services Cohasset

What You Get When Everything Works

Your house stays the right temperature, no matter what’s happening outside. You’re not wondering if your heating system will make it through another New England winter or if your AC will quit during the first heat wave.

You have a local HVAC company that actually shows up when we say we will. No more sitting around waiting for technicians who might not come, or dealing with companies that disappear after they cash your check.

When something does go wrong, you get it fixed fast. Your family stays comfortable, your energy bills stay reasonable, and you sleep better knowing your system is running the way it should.

Cohasset HVAC Company

We Know Norfolk County Systems

Dempsey Energy has been keeping Cohasset and Norfolk County homes comfortable through every season. We’ve built relationships with over 12,000 local customers who trust us with their heating and cooling needs.

Our technicians understand how coastal New England weather affects HVAC systems. We know which systems work best in older homes, what fails first, and how to fix problems that keep coming back.

When you call Dempsey Energy, you’re working with people who live and work in your area. We understand that when your heat goes out in January, it’s not just an inconvenience—it’s an emergency.

HVAC Repair Process Cohasset

Here's How We Fix Your Problem

You call, and someone actually answers. We ask the right questions to understand what’s happening with your system, then schedule a time that works for you—often the same day for urgent repairs.

Our technician shows up on time and explains what we’re going to check. We diagnose the problem thoroughly, not just the obvious symptoms, so you’re not calling back next week with the same issue.

Before any work starts, you know exactly what needs to be done and what it costs. No surprises, no hidden fees, no pressure to buy things you don’t need. Once you approve the work, we fix it right the first time and clean up after ourselves.

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Complete HVAC Services Cohasset

Everything Your System Needs

Dempsey Energy handles the full range of HVAC work—from emergency repairs when your system quits, to planned maintenance that prevents problems, to complete system replacements when it’s time for an upgrade.

We service all major brands and system types, whether you have an older furnace that needs coaxing through another winter or a newer high-efficiency system that’s acting up. Our Dempsey Comfort Club gives you priority scheduling and regular maintenance to keep everything running smoothly.

For Cohasset homeowners dealing with the salt air and temperature swings that come with coastal living, we understand which systems hold up best and what maintenance schedule actually prevents problems instead of just checking boxes.

How quickly can you respond to an HVAC emergency in Cohasset?

For true emergencies—like no heat in winter or complete AC failure during a heat wave—Dempsey Energy offers same-day service and 24/7 emergency response. We understand that some HVAC problems can’t wait until Monday morning, especially in New England weather. When you call with an emergency, we prioritize getting a technician to your home as quickly as possible, often within hours. Our goal is to restore your comfort and safety, not make you wait days for basic heating or cooling.

What's the difference between repair and replacement for my HVAC system?

The decision usually comes down to age, repair costs, and reliability. If your system is under 10 years old and the repair costs less than half of a replacement, fixing it usually makes sense. But if you’re looking at expensive repairs on a system that’s 15+ years old, or if you’re calling for repairs multiple times per year, replacement often saves money long-term. Our technicians will give you honest advice about whether your system is worth repairing or if you’re better off upgrading to something more reliable and efficient.

Do you service all brands of heating and cooling systems?

Yes, Dempsey Energy works on all major HVAC brands and system types, from traditional furnaces and central air to heat pumps, ductless systems, and high-efficiency units. Our technicians carry common parts for most systems and can source specialized components when needed. Whether you have a 20-year-old furnace or the latest smart thermostat system, we have the experience and tools to diagnose and fix the problem. We also work with both residential and light commercial systems throughout Norfolk County.

What does your Dempsey Comfort Club membership include?

The Dempsey Comfort Club gives you priority scheduling, regular maintenance visits, and member discounts on repairs. Members get their systems checked and tuned up before peak heating and cooling seasons, which prevents most emergency breakdowns. You also get preferred scheduling when you do need repairs, so you’re not waiting as long as non-members. The maintenance visits include cleaning, adjustments, and catching small problems before they become expensive repairs. It’s designed to keep your system running reliably while saving you money on both energy bills and major repairs.

How do I know if my HVAC system is the right size for my home?

An oversized system cycles on and off too frequently, wasting energy and wearing out components faster. An undersized system runs constantly but never quite keeps up with demand. The right size depends on your home’s square footage, insulation, window efficiency, and local climate factors. Dempsey Energy performs proper load calculations to determine the correct system size for your specific home, not just a rough estimate based on square footage. This ensures your new system runs efficiently, maintains consistent temperatures, and lasts as long as it should.

What should I do when my heating system won't turn on?

First, check your thermostat settings and make sure it’s set to heat mode and the temperature is set higher than the current room temperature. Check if your circuit breaker has tripped and reset it if needed. Make sure your furnace filter isn’t completely clogged, as this can cause the system to shut down for safety. If these basic steps don’t solve the problem, or if you smell gas or hear unusual noises, stop troubleshooting and call Dempsey Energy immediately. Some heating problems are safety issues that need professional attention, and trying to fix them yourself can be dangerous.

Local Resources

Cohasset, MA is located in Norfolk County in Massachusetts State