Furnace, Boiler & AC Repair and Mini Split Installation in Fairhaven, MA
Armus Mechanical is based in Lakeville and serves all of Fairhaven. We repair and install boilers, furnaces, mini splits, heat pumps and AC in Fairhaven homes, and we service walk-in coolers and rooftop units for Fairhaven businesses. Call 508-521-9477; the phone is answered 24/7.
- Same-day repair
- Free estimates on new systems
- Financing through Wisetack
- Warranty on our labor
Hi! What's going on at your Fairhaven home today?
At a glance
- Service area
- All of Fairhaven, MA
- Based in
- Lakeville, MA. We come to your home or business.
- Phone
- 508-521-9477, answered 24/7
- Specialties
- No-heat repairs, hydronic boilers, mini split maintenance, walk-in coolers and rooftop units
- Pricing
- Paid diagnostic on repairs; free written estimate on replacements
Based in Lakeville, we cover all of Fairhaven. The phone is answered 24/7: 508-521-9477.
What do you need today?
RepairNo heat in a Fairhaven home? A repair starts with a paid diagnostic visit.HVAC repair →
MaintenanceMini split maintenance and a whole-house inspection of the mini split, furnace and water heater were both June 2026 visits.Maintenance plans →
ReplacementA free written estimate when a boiler, furnace or cooler is past repair.New system quote →
EmergencyHeat out, or a cooler losing temperature? Call 508-521-9477 at any hour; the phone is answered 24/7.Emergency heating & AC · 508-521-9477 →Recent work in Fairhaven
Between April 2025 and October 2026 we completed 20 jobs in Fairhaven.
- July 2026, Refrigeration system. Diagnosed the system and assessed the compressor.
- July 2026, Rooftop unit. Diagnosed the unit and repaired a loose connector pin.
- June 2026, Walk-in coolers. Evaluated a walk-in cooler and recommended replacement; a separate job reconnected a walk-in cooler.
- June 2026, Fujitsu mini split. Did the maintenance visit.
- June 2026, Mini split, furnace and water heater. Did a comprehensive diagnostic inspection of all three.
- February 2026, Hydronic boiler system. Repaired the system and replaced components.
Updated October 2026
Heating & Cooling Services in Fairhaven
In Fairhaven we repair and replace boilers, furnaces, mini splits and AC for homes, and we service walk-in coolers and rooftop units for businesses.
Boiler repair and replacement
In February 2026 we repaired a hydronic boiler system and replaced components on it. A no-heat repair starts with a paid diagnostic visit.
Mini split maintenance
We maintained a Fujitsu mini split in Fairhaven in June 2026. Outdoor units near the water collect salt, so ask for the coil to be checked at each visit.
Whole-house inspection
A comprehensive diagnostic inspection can cover a mini split, a furnace and a water heater in one visit, as it did in June 2026. Each system gets its own diagnosis during the same visit.
Furnace repair
Furnace calls begin with a paid diagnostic visit. When a furnace cannot be saved, a free written estimate comes first; see furnace installation and replacement.
Commercial refrigeration repair
In June and July 2026 we evaluated and reconnected walk-in coolers and assessed a refrigeration compressor. Refrigeration requests go to our separate refrigeration site.
Rooftop unit repair
In July 2026 we repaired a loose connector pin on a Fairhaven rooftop unit. Rooftop units are covered on the commercial rooftop page.
Fairhaven Neighborhoods We Serve
We serve all of Fairhaven, including these areas:
- Fairhaven Village and the center of town
- Oxford Village
- Sconticut Neck and the Little Bay shore
- the Fort Phoenix and harbor area
Nearby towns we also serve: New Bedford, Acushnet, Mattapoisett, Dartmouth, and Marion.
New BedfordFall RiverDartmouthFairhavenAcushnetWestportSomersetSwanseaMattapoisettRochesterFreetownWarehamRehobothMiddleboroughTauntonRaynhamBerkleyNortonBridgewaterWest BridgewaterEastonBrocktonMansfieldStoughtonRandolphPlymouthDuxburyMarshfieldScituateNorwellCohassetHinghamQuincySandwichFalmouthBarnstableHyannisYarmouthChathamOrleansWellfleetProvincetownEastern Rhode Island What are Fairhaven homes like for heating and cooling?
Fairhaven has older village homes near the harbor, capes and ranches in the inland neighborhoods, and waterfront houses along Buzzards Bay and Sconticut Neck. Salt air is part of the equipment decision near the water. Many homes heat with oil or gas boilers feeding radiators or baseboard, and those houses usually have no ducts for AC. For those, a mini split is the usual choice.
Which utility and rebate program applies in Fairhaven?
Fairhaven customers buy electricity from Eversource, and gas where a main reaches the street. Mass Save runs the heat pump rebates and 0% HEAT Loan for eligible Eversource customers, and the terms change. Ask us at the estimate and we will confirm the terms in effect.
Family owned and operated out of Lakeville, licensed and insured in Massachusetts.
We fix, maintain and install heating, cooling and water-heating systems. We do not sell equipment on its own or repair household appliances.
Available for new systems through Wisetack via Housecall Pro, subject to credit approval. Estimates on new systems are free.
Seasonal plans keep your system running and catch small problems before the first freeze. Ask about yearly maintenance options.
Every repair and installation carries a warranty on our labor on top of the manufacturer's equipment warranty, written on your quote.
Mass Save Heat Pump Installer Network participating contractor.
Rebates and the 0% HEAT Loan available.
Fairhaven Furnace, Boiler & AC Questions, Answered
My heat is out in Fairhaven. What should I check first?
Look at the thermostat setting, the boiler or furnace switch and the oil or gas supply. A boiler that runs while one room stays cold is a different problem, so call 508-521-9477 and tell us which rooms. The phone is answered 24/7, and repairs start with a paid diagnostic.
Do you work on walk-in coolers in Fairhaven?
Yes. In June and July 2026 we evaluated and reconnected walk-in coolers and assessed a refrigeration compressor for Fairhaven businesses. For refrigeration requests, use our refrigeration site, and note the equipment type, the temperature in the box and the business name.
What does a whole-house diagnostic inspection cover?
It checks each system in turn. In June 2026 one Fairhaven visit covered a mini split, a furnace and a water heater. Repairs start with a paid diagnostic visit, and any replacement gets a free written estimate.
Do you service rooftop units for Fairhaven businesses?
Yes. In July 2026 we diagnosed a rooftop unit and repaired a loose connector pin. See commercial rooftop unit repair.
Is Mass Save available in Fairhaven?
Yes. Fairhaven customers buy electricity from Eversource, and Mass Save handles the heat pump rebates and the 0% HEAT Loan. We confirm the terms in effect at the estimate.
How do I book a Fairhaven visit?
Dial 508-521-9477 at any hour; it is answered 24/7. If you would rather type, send the form; a text confirms your visit. A repair starts with a paid diagnostic visit, and any replacement comes with a free written estimate.
Helpful guides for Fairhaven homes
Brands we install in Fairhaven
- Lochinvar
- Triangle Tube
- Energy Kinetics
- Oxbox
- Aprilaire
Furnace, Boiler & AC Service in Fairhaven
Same-day repair. Call 508-521-9477, or tap Book ASAP and the office confirms your visit by text.