An overhead view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

AC Maintenance in Keene, NH

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 Cheshire County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor air conditioning condenser unit on a concrete pad next to the gray vinyl siding of a residential home.

Two short months, then a long rest

Your air conditioner in Keene works hard for two months a year, July and August, with afternoons averaging 78°F. The rest of the year it sits outside doing nothing, and a unit that sits is where a loose connection or a low refrigerant charge can go unnoticed until the first hot day.

Cheshire County has logged 164 damaging wind events and 43 hail events over the past ten years, with hailstones up to 1.75 inches. Wind can knock a unit out of level and hail can bend the fins on the outdoor coil, neither of which you would necessarily see from the ground. A tune-up checks the coil, the refrigerant charge, and the electrical connections before summer puts the unit to the test.

2 months
July through August, your air conditioner is on duty
78°F
the average summer afternoon it cools against
43 hail events
in ten years, and hail bends the fins on outdoor coils
164 wind events
in ten years, and wind drives debris into outdoor units
Isometric grayscale illustration of a cutaway house interior showing a furnace with ductwork, interior rooms with furniture, and an outdoor condenser unit connected by lines at the exterior wall.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding and a sliding glass door.

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

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

New Hampshire has no state license for HVAC contractors.

There is no state license or registration behind that work in New Hampshire, and no county filling in the gap either. No state record exists for who is doing HVAC work in Cheshire County or how well.

What does apply is federal. Air conditioner maintenance often means opening the refrigerant side of the system, to check the charge or get to the coil, and any technician who does that has to hold EPA Section 608 certification, in every state including New Hampshire. That certification is not a state license and does not cover the rest of the job. It only means the person handling the refrigerant was tested on that.

Source: New Hampshire General Court

What does AC maintenance include?
A technician checks refrigerant charge, cleans the condenser coil, and tests the capacitor and electrical connections. They also check airflow across the indoor coil and make sure the condensate drain isn't clogged. Anyone opening the refrigerant side has to hold EPA Section 608 certification, since that's a federal rule no matter where you live. The point of all this is catching a weak part before it fails during the two months a year your AC actually has to work.
How often does an air conditioner need maintenance?
Once a year is standard, and the best time is before the weather turns warm. Keene only asks the system to run in July and August, so a spring check gives a contractor time to order a part if something needs replacing before you need the cooling. Skipping years doesn't always show up right away, but dirt on the coil and a weak capacitor both get worse quietly.
Is AC maintenance worth it?
Yes, mainly because it catches small problems while they're still small. A dirty coil or a capacitor on its way out won't always announce itself, it just makes the system work harder until something quits on a hot afternoon. With cooling season here lasting only two months, a single missed check can mean living with a bad system for most of the summer before anyone looks at it.