Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

AC Maintenance in Nantucket, MA

Air conditioners here run from July through August, so June is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Nantucket County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment

What kind of equipment?*

Overhead view of an outdoor AC condenser unit on a concrete pad next to a house with a dark shingle roof.

Two months of real work, then months of sitting idle

Your air conditioner earns its keep in July and August here, and the rest of the year it sits. Summer afternoons average 74°F, which is mild compared to most of the country, but the unit still needs to be ready when it's asked to run.

A machine that sits idle most of the year can develop problems you won't see until the first hot day, a stuck contactor, a refrigerant leak that's been slowly losing pressure, a capacitor that's weakened over months of not running. Nantucket also sees its share of wind, 60 damaging wind events recorded over the past ten years, which can knock debris into an outdoor unit or shift it on its pad. A tune-up before the season starts catches these things while there's still time to fix them, instead of on the first 74-degree afternoon when you need the house cool.

2 months: July through August, your air conditioner is on duty
74°F: the average summer afternoon it cools against
1 hail events: in ten years, and hail bends the fins on outdoor coils
60 wind events: in ten years, and wind drives debris into outdoor units

Isometric illustration of a cutaway house showing interior rooms, an attic furnace with large ducts, and an outdoor condenser unit connected by a line set, on a white background.

Your air conditioner works hardest from July through August.

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NOAA nClimDiv, 1991–2020 normals

Aerial view of a gray outdoor air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

Book your AC tune-up in June, before homes here start needing cooling in July.

A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.

What does AC maintenance include?: A technician checks refrigerant pressure, cleans the condenser coil, and tests the capacitor and contactor in the outdoor unit. They also check the blower and the evaporator coil, change or clean the filter, and confirm the thermostat is calling for cooling correctly. On the outside unit they clear leaves and debris away from the coil so air can move through it. The point is to catch a weak part before it fails on a hot afternoon.
How often does an air conditioner need maintenance?: Once a year, ideally before the weather turns warm. Here on Nantucket that means getting it looked at sometime before July, since cooling only runs July through August. A yearly check catches a low refrigerant charge or a worn capacitor while it is still an easy fix, not a breakdown.
Is AC maintenance worth it?: Yes, because the alternative is finding out something is wrong on the first hot day. Cooling season here is short, just July and August, so there is little room to lose a week of it waiting on a part or a repair. A yearly check before summer makes sure the unit is ready when it is actually needed.

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