HVAC Maintenance & Tune-Ups in Southeastern MA & RI

Armus Mechanical tunes up furnaces, boilers, oil burners, central air conditioners, heat pumps and ductless mini-splits for homeowners across SouthCoast Massachusetts, the South Shore, Cape Cod and eastern Rhode Island. A tune-up from us is a real service visit, not a quick look and a sticker on the cabinet: we clean what needs cleaning, test what wears out, measure how the system is actually performing, and tell you plainly what we found.

Our phones are answered 24 hours a day, and every visit starts with a flat-rate price you approve before we touch anything. If your system is already broken rather than due for service, go straight to our HVAC repair page or just call 508-521-9477.

What a Heating Tune-Up Includes – Furnace, Boiler and Oil Burner

Heating season in our area runs roughly October through April, and the equipment in the basement does most of its work in the dark, so the fall tune-up is the one visit we would never skip. What we do depends on what you heat with.

Gas furnace. We pull and inspect the burners, clean the flame sensor and check the igniter, inspect the heat exchanger for cracks or corrosion, test the pressure switch and the limit and rollout safeties, check the inducer and blower motors, clean or replace the filter, verify gas pressure and temperature rise against the nameplate, and clear the condensate trap and drain on high-efficiency units. We finish with a combustion check. If we find something a tune-up cannot fix, we quote the repair flat-rate on the spot and you decide. More on furnaces and furnace repair.

Oil burner. Oil heat is still common across Plymouth County and the towns off Route 44 – Lakeville, Middleborough, Rochester, Carver, Plymouth – and no heating equipment needs annual service more. We replace the nozzle, the oil filter and the pump strainer, clean and set the electrodes, check the cad-cell flame sensor, vacuum the combustion chamber and flue passages, check the barometric damper and chimney connection, and run a combustion efficiency test with a digital analyzer. A burner that goes two or three seasons without this is the one that locks out on the coldest morning in January.

Boiler. For steam and hot-water boilers we clean the burner and heat exchanger, check ignition and flame, test the relief valve, low-water cutoff and every other safety control, check the expansion tank and system pressure, bleed or skim the system as needed, inspect the venting and flue, and run a combustion analysis. Older cast-iron boilers under the triple-deckers of New Bedford and Fall River respond well to this; so do the newer condensing boilers, which have narrower passages and need the condensate trap cleaned every year. Full details on our boilers page.

Every heating visit. Regardless of fuel, we check thermostat calibration, look over the ductwork or piping near the equipment, and check for carbon monoxide at the unit.

What an AC and Heat Pump Tune-Up Includes

Spring is the time for cooling maintenance, before the first humid stretch in June puts the system under real load. Our central AC or ducted heat pump tune-up covers the outdoor unit, the indoor unit and everything between them.

Outdoor unit (condenser). We shut off power and clean the condenser coil properly, from the inside out where the cabinet allows. We inspect the coil fins for damage and corrosion, test the run capacitor and the contactor, check the condenser fan motor and blades, tighten electrical connections, and check the refrigerant charge by measuring superheat and subcooling against the manufacturer’s targets rather than guessing from a gauge reading. A weak capacitor or a pitted contactor is the most common cause of a mid-July no-cool call, and both are cheap to catch in May.

Indoor unit (air handler or furnace coil). We inspect the evaporator coil and clean it if it is fouled, replace or clean the filter, check the blower motor and wheel, flush the condensate drain line and pan, check the float switch, and verify airflow and the temperature drop across the coil.

Heat pumps. A heat pump is an air conditioner that also runs in reverse all winter, so it gets twice the hours of a plain AC and needs the same attention twice a year. On top of the cooling checklist we test the reversing valve, the defrost control and the outdoor coil sensor, check the auxiliary or backup heat, and confirm the outdoor unit is sitting above the snow line on its stand with clear drainage underneath. Frost that never clears in January is usually a defrost or charge problem that was already visible in the spring readings. See heat pumps and heat pump repair.

More on the cooling side: air conditioning.

Mini-Split Cleaning and Maintenance – Fujitsu and Mitsubishi

We install Fujitsu and Mitsubishi ductless systems, so we know exactly where dirt collects in them. Homeowners rinse the mesh filters and assume the head is clean, but the blower wheel behind them packs with fine dust and, in a humid summer, biofilm. A loaded blower wheel cuts airflow, makes the head noisier, overflows the drain pan down the wall, and puts a musty smell into the room every time the unit starts.

A mini-split maintenance visit from us includes cleaning the filters and the indoor coil, cleaning the blower wheel and the drain pan, flushing the condensate line and checking the condensate pump if one is installed, checking the line-set insulation and flare connections at both ends, cleaning the outdoor coil, testing the outdoor fan and electrical connections, checking the charge, and confirming each head is communicating properly with the outdoor unit on multi-zone systems. We service Fujitsu and Mitsubishi systems whether or not we installed them, and other ductless brands as well. More on our ductless systems page.

When to Schedule – The Southeastern Massachusetts Maintenance Calendar

• September and October: furnace, boiler and oil-burner tune-ups, before the first cold snap and before the schedule fills with no-heat calls.
• April and May: central AC and heat pump cooling tune-ups. Spring is also when oak pollen and tree dust coat every outdoor coil in the region, so a cleaning in this window pays off all summer.
• Spring or fall: mini-split cleaning. Heads that ran all summer for cooling benefit from a cleaning before they switch to heating; heads that run year-round benefit from twice a year.
• Heat pumps: twice a year, once before cooling season and once before heating season, because the unit never really gets a season off.
• Between visits: change or clean 1-inch filters every one to three months, thicker media filters roughly every six to twelve months, and rinse mini-split mesh filters monthly during heavy use. Keep two feet clear around the outdoor unit.

Missed the window? Book anyway; a tune-up in December or July still beats none.

Why Maintenance Matters More Near the Coast

Equipment in Southeastern Massachusetts and eastern Rhode Island ages faster than the brochure suggests, for reasons that are specific to where we live.

Salt air. Condensers and heat pumps within a few miles of Buzzards Bay – New Bedford, Fairhaven, Mattapoisett, Marion, Wareham, Dartmouth – and along Mount Hope Bay in Fall River, Somerset and Swansea, plus everything on the Cape and in Bristol and Tiverton, Rhode Island, sit in salt-laden air that corrodes aluminum coil fins, rusts fan motors and cabinets, and pits electrical contacts. An annual coil rinse and a look at the fins, fasteners and contactor is not optional near the water; it is the difference between a condenser that reaches its expected life and one that does not.

Pollen and oak dust. Every spring the oaks and pines across Plymouth and Bristol counties coat cars, decks and condenser coils in yellow. That layer traps heat in the coil and makes the compressor run hotter and longer; it is easy to clean off in May and expensive to ignore through August.

Oil heat. A large share of homes in Lakeville, Middleborough, Carver, Plymouth, Rochester and Freetown still heat with oil because the gas main never reached the street. Oil burners depend on a clean nozzle and filter; skipping the annual service is the most common reason we get a lockout call.

Old houses, long heating seasons. New Bedford and Fall River have some of the oldest housing stock in the country, and boilers and furnaces there run a solid six to seven months a year. Regular service catches a waterlogged expansion tank, a sticking zone valve or a fouled flame sensor while the fix is still small.

Humidity. Humid summers mean condensate drains clog with algae while evaporator coils and mini-split blower wheels grow biofilm. Most of the dripping and musty-smell calls we get in August were preventable with a spring drain flush and coil cleaning.

What Maintenance Can and Cannot Do

We would rather tell you this up front than have you find out in February. A tune-up keeps a sound system running efficiently and safely and catches wear parts before they fail. It does not restore a cracked heat exchanger, a leaking evaporator coil, a compressor that is drawing high amps or a boiler with a cracked section. When we find one of those, we stop, explain what we found, and give you a flat-rate price for the repair or a straight answer on replacement. You approve every step. If the system is past sensible repair, current Mass Save incentives for qualifying heat pumps may change the math; check the current program rules at masssave.com or ask us, and see our Mass Save page for how the process works. Note that Mass Save rebates are tied to qualifying new equipment, not to a tune-up itself.

Annual Maintenance Agreement

If you would rather not remember to book every spring and fall, ask about our annual maintenance agreement. We put your equipment in our system, reach out when your visit is due, and schedule it around you. Call 508-521-9477 for the details, or mention it when you book.

HVAC Maintenance Service Areas

We are based at 143 Main St in Lakeville, minutes from Route 18 and I-495, and we run tune-up routes across the whole region. Along Route 140 and Route 18 we cover New Bedford, Freetown and Acushnet, and Route 6 takes us through Dartmouth, Westport, Fairhaven and Mattapoisett. Off Route 24 we serve Fall River, Somerset, Swansea, Berkley and Taunton, and Route 44 carries us through Raynham, Middleborough and Seekonk toward the Rhode Island line. On the South Shore we work Bridgewater, Brockton and Plymouth off Route 3, and Route 25 takes us into Wareham, Marion and Rochester and over the bridges to the Upper Cape. To the west we follow I-195 into eastern Rhode Island, including Providence, East Providence, Barrington, Warren, Bristol and Tiverton. If you do not see your town, call 508-521-9477 or contact us – we probably still cover it.

Frequently Asked Questions About HVAC Maintenance

How often should I have my HVAC system serviced?

Once a year for a furnace, boiler or oil burner, ideally in September or October before heating season. Once a year for central air conditioning, ideally in April or May before the humid weather. Twice a year for a heat pump, because it runs in both seasons. Mini-splits should be cleaned at least once a year, and twice if they run year-round or sit in a kitchen or a room with pets. Filters need attention between visits regardless: every one to three months for 1-inch filters.

What does an HVAC tune-up include?

For heating: cleaning the burners and heat exchanger or combustion chamber, testing the igniter and flame sensor, testing every safety control, checking the blower, filter and thermostat, clearing the condensate drain on high-efficiency units, and running a combustion check. For cooling: cleaning the condenser coil, testing the capacitor and contactor, checking the fan motors and electrical connections, measuring the refrigerant charge by superheat and subcooling, inspecting the evaporator coil, flushing the condensate drain, and verifying airflow and temperature drop. Oil burners also get a new nozzle, filter and strainer. Mini-splits get the blower wheel, coil, filters and drain cleaned.

Is a tune-up worth it if my system is running fine?

Yes, and that is the best time to do it. The parts that cause most breakdowns, a weak capacitor, a dirty flame sensor, a clogged oil nozzle, a fouled condensate drain, show up on a tune-up long before the system stops. A clean coil and a correct refrigerant charge also mean the system uses less energy to do the same job, and most manufacturers expect documented annual maintenance to keep a parts warranty in force. Skipping it usually costs more than doing it.

Do you clean mini-split blower wheels, or just the filters?

We clean the blower wheel, the indoor coil, the drain pan and the condensate line, not just the mesh filters. The blower wheel is where the dust and biofilm actually collect, and it is the reason a mini-split gets noisy, drips down the wall or smells musty when it starts. We service Fujitsu and Mitsubishi systems, including multi-zone systems and units we did not install.

Can I get a Mass Save rebate for HVAC maintenance?

Mass Save rebates are generally tied to qualifying new equipment, mainly heat pumps and other high-efficiency systems, rather than to routine service. If a tune-up shows that your system is near the end of its life, the current incentives may make a heat pump replacement worth pricing out. Program rules and amounts change, so check masssave.com or ask us for the current terms before you decide.