
Comprehensive Air Conditioning Services in Harwich, MA
Air conditioning services during the summer can be just as comfort-saving as a heater in the dead of winter. As a licensed and full-service HVAC contractor, Monomoy Mechanical is fully qualified to deliver the air conditioning solutions our clients deserve. Keep cool whenever you need to by giving us a call right away!
Make Regret-Proof HVAC Decisions
The only surefire way to make the best choices for your AC system is to understand your own needs, expectations, and limitations. You should know what spaces are priorities for conditioning as well as the type and duration of space usage. It’s also a good idea to consult closely with our AC company when assessing your options.


Our Cooling Services
The Power of Professional Service
Air conditioning systems are delicate, complex and essential for comfortable living. That’s why you should find a professional contractor you can trust for air conditioning replacement, installs and repairs. Our customers in Cape Cod keep choosing us as their HVAC technicians because we know the community and how to best serve its AC needs.
Need AC services? Don't hesitate to give us a call at (508) 623-6952 or fill out our online form to schedule your system's maintenance.
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Cost-Saving Membership Plans
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30+ Years of Combined Experience
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Financing & Rebates Available
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Locally Owned & Operated

See What Your Neighbors Are Saying
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“Called Monomoy Mechanical after trying to troubleshoot my AC with no luck. They arrived within two hours. They immediately identified the problem, provided a solution, and fixed it. Very reasonably priced! I highly recommend Monomoy Mechanical!”- Mary S.
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“I was very pleased with the techs from Monomoy Mechanical. They were prompt, neat ,and showed concern for my issues.”- David S.
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“They installed my new furnace/boiler, replacing a 35-year-old unit. Everyone who worked on the new system was an expert. To me, the install is an engineering work of art. Everything was explained, and they helped me pursue the MASS SAVE rebate as well.”- Peg H.
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“Dave is awesome, definitely my go-to guy. He’s done work for me at my business and home. He’s always on time, honest, and very informative. Fits you into his schedule super fast and answers your calls right away. The pricing is very fair!”- Karina H.
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“We placed a call for no AC in the heatwave, and they were there that day! Dave was great! He was honest and completed the work quickly!”- Robert B.
Frequently Asked Questions
Have questions? We are here to help. Still have questions or can't find the answer you need? Give us a call at 508-623-6952 today!
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When should I consider replacing my system?
Replacement becomes necessary when the existing hardware is simply too old or damaged to be worth repairing. Owners may also opt to replace early for the sake of energy efficiency or greater comfort control.
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Why is my AC not getting as cold as before?
Low refrigerant levels are a common cause of poor AC performance. You may also notice a drop in output due to other problems, like insufficient insulation or poor air circulation.
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What should I do if my unit stops working suddenly?
Suddenly losing your AC in the height of summer is no laughing matter. Give us a call for emergency air conditioning repair and other urgent services.
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What are some of the most common problems with air conditioners?
Faults in the internal circuitry, component failure, refrigerant leaks, and insufficient BTU output for the target space are all common issues in New England.