HVAC tune-ups and maintenance plans for Hamptons homes, including the ones that sit empty all winter

What a tune-up includes

A cooling visit in spring: refrigerant charge checked against the manufacturer's superheat or subcooling target, the condenser coil cleaned, capacitor and contactor tested, the blower and evaporator inspected, the condensate drain cleared, the thermostat checked and the airflow and temperature split measured. A heating visit in fall: burners or the heat exchanger cleaned and inspected, ignition and safety controls tested, a carbon-monoxide test, flue and draft checked, and on a boiler the circulator, expansion tank, zone valves and relief valve. On a heat pump, both visits look at the defrost cycle and the outdoor coil.

What it costs (2026, national ranges)

Item	Cost
AC tune-up	$60–200 per visit
Furnace or boiler tune-up	$70–200 per visit (most homeowners $100–150; a standard visit about $150)
Annual maintenance agreement, two visits	$150–350 per year typical; furnace-specific plans $150–500

Is a maintenance plan worth it?

Do the arithmetic. Two tune-ups bought separately at $100–150 each is $200–300; a plan at $150–350 is roughly the same money and usually adds filter changes, a repair discount and priority scheduling. Priority scheduling is the part that matters in the Hamptons: when the first 90-degree weekend arrives in July, every contractor's phone rings at once, and the plan customers are seen first. If the house is empty for months at a time, a plan with a fall visit that includes the shutdown checklist below is worth more than the discount.

Salt air

Outdoor units within a few miles of the ocean corrode faster than the manuals assume. Trade guidance from other coastal markets: rinse the condenser coil with low-pressure water 2–4 times a year on an oceanfront site and 1–2 times a year inland, never with a pressure washer, and keep the unit at least 12 inches off grade. When a coil is replaced, ask for a salt-spray-rated (ASTM B117) coil; some manufacturers' coated coils come at no extra cost on the right model.

The second-home checklist

This is the visit that matters most on the South Fork, because a heating failure in an empty house is a burst-pipe claim.

• Thermostat. Most homeowner policies expect "reasonable care" against freezing, commonly read as keeping the house at or above 55°F while it is unoccupied, or shutting off and draining the water. A 2024 New York court case turned on exactly that 55°F fact pattern, and insurers have pointed to low utility usage as evidence the heat was off.
• Temperature alarm. A Wi-Fi freeze alarm starts at about $25 (some cloud-connected models add $5–10 a month) and alerts several people by app, email or text when the inside temperature drops.
• Power. Tropical Storm Isaias in August 2020 knocked out roughly 645,000 PSEG Long Island customers at its peak and full restoration took 8 days. That is why East End second-home owners monitor remotely and keep a local contractor's number: a heat pump or boiler cannot run without power, and a generator has its own maintenance schedule.
• Filters and drains. Fresh filters before the house closes, condensate drains cleared, the outdoor unit clear of leaves.

When to book

Cooling checks before Memorial Day, heating checks in September or October, before the first cold night and before the contractor's emergency season. If the house closes for the winter, book the heating visit for the week it closes.