Greenwich HVAC Company handles heating and cooling for homes, rental properties, commercial spaces, and everything in between across Greenwich and Fairfield County. Whether the call is about an AC that stopped working in July, a furnace that quit overnight, a heat pump that needs a full replacement, or a system that has been running rough all season, we take it from diagnosis to done.
We work on repair, installation, and seasonal maintenance, every day from 6:30 AM to 9:30 PM. Residential homeowners, landlords, property managers, and commercial clients all reach the same number and get the same process: the scope discussed on the phone, the price confirmed before anything is scheduled.
Fast diagnosis. Pricing set out up front. Comfort restored.
Call (475) 239-2878 for a quote.
From aging systems to brand-new installs, the work covers the full range of residential and commercial HVAC. Below is what that looks like in practice.
When an air conditioner stops working or starts blowing warm air, the fault can sit anywhere from a refrigerant leak to a failing blower motor to a clogged evaporator coil. The visit covers a full diagnostic: refrigerant levels checked, condenser and evaporator coils inspected, airflow measured, and the air handler assessed. Uneven temperatures from room to room often point to duct or airflow issues rather than the unit itself, and we check for both. You get a clear picture of what is wrong before any repair is authorized.
A furnace blowing cold air or no heat at all usually comes down to the ignition system, the burner, or the heat exchanger. The diagnostic covers all three, along with the controls and the flue. The diagnosis explained before any repair is authorized is how every furnace call goes: the technician who comes out walks through what was found and what it takes to fix it before any work starts.
Heat pumps run year-round, so a fault in January is just as urgent as one in August. The diagnostic covers refrigerant charge, the reversing valve, the coils, and the electrical controls on the unit. Heat pumps, furnaces and mini-splits all within scope means a property with more than one system type gets handled in a single call. New heat pump installations are also available for properties replacing aging equipment or converting from another fuel source.
When a system has reached the end of its useful life, replacement is the more practical path. The process starts with sizing the new equipment to the space, selecting the right unit for the load, and scheduling the install. We handle full system replacement for residential homes, apartment buildings, and commercial properties. The scope and the price are confirmed before the work begins.
We service heating and cooling in every season.
From a quick tune-up to a whole-system replacement, the diagnosis comes first, and the supporting services below are often where the real comfort problem lives.
A thermostat that is not reading temperatures accurately, cycling the system at the wrong times, or failing to respond to input is worth replacing before it causes a larger problem. We install standard thermostats, programmable models, and smart controls that connect to a phone or home network. The wiring involved stays on the low-voltage control side of the HVAC equipment, which is where the work belongs.
Leaking ducts are one of the more common causes of uneven temperatures and high energy bills in older homes. The inspection covers the full duct run: joints, seams, connections at registers, and sections running through unconditioned spaces. Sealing or replacing damaged sections brings the system back to delivering conditioned air where it is supposed to go rather than losing it in the walls or attic.
Air filtration, whole-home purifiers, and HVAC-integrated humidifiers and dehumidifiers all fall within the scope of what we install and service. For residential clients, the concern is often allergens, dust, or humidity. For commercial and property-management clients, it is frequently about maintaining consistent air quality across multiple occupied spaces. The right solution depends on the system and the space, and we go through the options on the call.
We'll go through what the service covers before it is booked.
HVAC work like this is the bulk of what a season brings, and scheduling a tune-up before the weather shifts is the straightforward way to avoid a breakdown at the worst time.
A maintenance visit covers an inspection of the heat exchanger or coils, a cleaning of the burner or condenser, a check of refrigerant levels, a review of the controls and safety switches, and an assessment of overall efficiency. For a furnace, fall is the right time. For an air conditioner, spring works. Either way, older equipment assessed on its own merits is how the visit goes: the goal is an honest read of what the system needs, not a push toward replacement when repair is the better answer.
Property managers and commercial clients with multiple units can schedule maintenance across a building or portfolio. The scope and the rate are confirmed before anything is booked.
Reach out and we'll work out what it needs.
Ready to get the comfort back? When the heat goes out in the middle of a cold stretch or the AC quits during a heat wave, the call goes to the same number and gets the same process: scope discussed on the phone, price confirmed before scheduling.
The season a system struggles in says a lot about the fault. A furnace that trips in January often points to a heat exchanger issue or a pressure switch. An AC that stops cooling in August is frequently a refrigerant or capacitor problem. Knowing the season and the symptom together narrows the diagnosis before the visit starts.
We take emergency calls every day from 6:30 AM to 9:30 PM.
No heat, no AC, system down entirely: call (475) 239-2878 and we will go through what is happening and what the visit covers.
We're ready to get your heating and cooling running again.
Greenwich sits in a part of Connecticut where the housing stock runs old and the winters run cold. Boiler systems, oil heat, and homes built without ductwork are common across the area, and the services below reflect that.
Many Greenwich homes were built with boiler-based hydronic heating: hot water or steam circulating through radiators rather than forced air through ducts. These systems are durable, but they need specific knowledge to service correctly. A boiler that is not heating, cycling irregularly, or losing pressure requires a diagnostic that covers the heat exchanger, the circulator pump, the expansion tank, and the controls. We handle boiler repair, boiler replacement, and routine boiler maintenance. The visit covers the full system, not just the unit.
Fairfield County has a significant share of oil-heated homes, and the cost of oil heat makes conversion a practical conversation for many property owners. The assessment covers the existing system, the load requirements of the space, and the equipment options available, whether that is a gas furnace, a heat pump, or a combination of both. The goal is matching the replacement to the building rather than defaulting to whatever is easiest to install. We scope the job on the call and confirm the price before any work begins.
Older Greenwich homes often have no ductwork at all, and adding a full duct system to a historic or renovated property is not always practical. A ductless mini-split installs without tearing into walls or ceilings: an outdoor unit connects to one or more indoor air handlers mounted in the rooms being conditioned. Mini-splits handle both heating and cooling, which makes them a clean solution for additions, finished basements, converted attics, or whole-home zoning in a non-ducted property. Heat pumps, furnaces and mini-splits all within scope means a mixed-system home gets handled without bringing in a second contractor.
We service heating and cooling in every season, and these three services cover the work that comes up most often in this part of Connecticut.
When the job is done, we leave your home clean and comfortable, and the same standard applies on a commercial property or a multi-unit building.
For residential clients, that covers single-family homes, condos, apartments, and rental properties. A landlord dealing with a tenant's no-heat call gets the same diagnostic process as a homeowner: the fault identified, the repair scoped, the price confirmed before work starts.
For commercial clients, the scope includes office buildings, retail spaces, and mixed-use properties. Commercial HVAC systems often run longer hours and carry more load than residential equipment, which affects how a diagnostic is approached and what a replacement involves. Property managers overseeing multiple units or buildings can discuss scheduling across a portfolio on the same call.
In every case, the HVAC service call starts with a clear scope and a confirmed price. We handle the diagnostic, explain what was found, and go from there.
Customers asking about HVAC repair cost, installation cost, or replacement cost get a real answer on the call, not a number pulled from a general estimate. The price depends on the equipment, the fault, and what the visit covers, and those details come out in the first conversation.
Common questions on a quote call include the service call fee, the diagnostic charge, and what is included in the rate quoted. Those are fair questions and we answer them directly. Nothing is scheduled until the scope and the price are clear.
We take calls every day from 6:30 AM to 9:30 PM.
Code-compliant work. Clear diagnosis. Pricing set out up front.
Call (475) 239-2878 for a quote.
We cover Greenwich and the surrounding communities across Fairfield County, including:
If your property is in Greenwich or nearby, call (475) 239-2878 to confirm coverage and get a quote.
The outdoor unit inspection covers the refrigerant pressures, the condenser coil condition, the fan motor and blade, the capacitor, and the electrical connections at the unit. A coil that is clogged with debris restricts airflow and causes the system to work harder than it should, which shows up as poor cooling or heating performance indoors. Refrigerant pressure readings taken at the outdoor unit tell a lot about whether the charge is correct and whether there is a leak in the system.
The diagnostic starts with the symptom described on the call and works outward from there. For a system that is running but not cooling, that means checking refrigerant charge, airflow at the air handler, coil condition, and the controls in sequence. For a furnace that will not ignite, it means checking the igniter, the flame sensor, the pressure switches, and the gas valve. The goal is identifying the actual fault rather than replacing parts until the symptom goes away.
An air conditioner that runs but does not cool is usually dealing with one of three things: a low refrigerant charge, a dirty or frozen evaporator coil, or a failing compressor. The first two are repairable in most cases. A compressor failure on an older system is often the point where replacement becomes the more practical answer, because the compressor is the most expensive component in the unit. The diagnostic confirms which situation applies before any recommendation is made.
The indoor inspection covers the evaporator coil, the blower motor and wheel, the air filter, the heat exchanger or heating elements, the drain pan and condensate line, and the controls. A dirty blower wheel or a clogged filter restricts airflow across the coil, which can cause the coil to freeze and reduce cooling output significantly. For a furnace, the heat exchanger condition is one of the more important checks, because a cracked exchanger affects both performance and safety.
A repair addresses a specific failed component while the rest of the system continues to function. A replacement makes sense when the cost of the repair approaches what a new system would cost, when multiple components are failing, or when the system is old enough that reliability is a concern going forward. Older equipment is assessed on its own merits on every visit, meaning the recommendation reflects what the system actually needs rather than a default toward either option.
A pre-season inspection before the first heating demand in fall or before the first cooling demand in spring catches problems while the system is not under load. In Connecticut's climate, a furnace that has a failing igniter or a heat exchanger with a developing crack is much easier to address in October than in January when the system is running hard and the weather is cold. The inspection covers the components most likely to cause an in-season failure.
A system that runs constantly but cannot meet the thermostat setpoint, one that short-cycles frequently, or one that produces noticeably uneven temperatures from room to room is showing signs of either age or a mismatch between the equipment capacity and the load. In Greenwich's climate, an undersized system will struggle most on the hottest and most humid days in summer and on the coldest nights in winter. The diagnostic covers both the equipment condition and whether the system is appropriately sized for the space.
Efficiency losses in older systems come from several sources: worn components that draw more power to do the same work, refrigerant charge that has drifted over time, coils that have accumulated dirt and restrict heat transfer, and ductwork that leaks conditioned air before it reaches the living space. Any one of these on its own has a measurable effect on energy use. A system dealing with several of them at once will show a significant gap between what it costs to run and what it delivers in comfort.
Many older homes in Greenwich and throughout Fairfield County were built with thermostats and ductwork that predate modern equipment by decades. A thermostat that cannot communicate correctly with a newer HVAC system will cause the equipment to cycle incorrectly, which affects both comfort and efficiency. Ductwork that was sized for an older system may not deliver the right airflow for a replacement unit, and leaking joints in older duct runs can offset a significant portion of the efficiency gains a new system would otherwise provide.
When a repair or replacement involves equipment that was installed under older standards, the work is done to the code currently in effect in Greenwich and Fairfield County. That can mean additional steps compared to a straightforward like-for-like swap, particularly on older boiler systems or furnaces where venting, clearances, or controls need to be brought up to current requirements. The scope of any code-related work is explained before it is carried out.
A burning smell at the start of the heating season is often dust burning off a heat exchanger that has not run in months, and it usually clears within a few minutes. If it persists, or if the smell is more like melting plastic or an electrical fault, the system should be shut off and inspected. A musty smell from the cooling side usually points to mold or mildew growth on the evaporator coil or in the drain pan, which is addressed by cleaning the coil and checking that the condensate drain is clear.
A furnace that is struggling will often show it through inconsistent ignition, a heat exchanger that is visibly discolored, or a system that runs but cannot hold the setpoint on cold nights. A heat pump that is failing tends to show up as poor performance in one mode (heating or cooling), short cycling, or frost buildup on the outdoor unit outside of normal defrost cycles. Either way, the diagnostic covers the full system rather than stopping at the first obvious fault.
A frozen coil is usually the result of restricted airflow, a low refrigerant charge, or both. When airflow across the coil drops below what the system needs, the coil surface temperature falls below freezing and ice forms. That ice further restricts airflow, which accelerates the problem. The result indoors is weak airflow from the vents and an AC that runs continuously without cooling the space. The repair involves identifying and correcting the underlying cause, not just thawing the coil.
Greenwich HVAC Company handles the full range of heating and cooling work: AC repair and service, furnace repair, heat pump installation and repair, boiler service, ductless mini-split installation, ductwork repair, indoor air quality, seasonal maintenance, and emergency calls.
We work every day from 6:30 AM to 9:30 PM. Residential homeowners, landlords, property managers, and commercial clients all start the same way: a call, a scope, a confirmed price.
Call (475) 239-2878 for a quote.
Every heating and cooling call starts the same way: the scope discussed on the phone, the price confirmed before anything is scheduled. We handle the full range of residential and commercial HVAC work across Greenwich and Fairfield County, from a seasonal tune-up on a boiler to a full ductless mini-split installation in a home without existing ductwork. The table below lays out what each service covers, who it fits best, and what is worth knowing before you call.
| Service Type | What the Service Includes | Best For | Helpful Details |
|---|---|---|---|
| Heating & Furnace Repair | Ignition system and burner check, Heat exchanger inspection, Flue and controls review, Full diagnostic before repair | Homes with a furnace blowing cold air or failing to start | Fall is the right time to catch a developing igniter or heat exchanger problem before cold weather puts the system under full load. |
| AC Repair & Service | Refrigerant charge check, Condenser and evaporator coil inspection, Blower motor and airflow assessment, Controls and capacitor check | Homes or commercial spaces with an AC that has stopped cooling or is running poorly | A system that runs but does not cool is often a refrigerant or coil issue, both of which are diagnosed before any repair is authorized. |
| Heat Pump Repair & Service | Refrigerant charge and reversing valve check, Coil and defrost cycle inspection, Electrical controls on the unit, Heating and cooling mode tested | Properties relying on a heat pump year-round for both heating and cooling | A heat pump that struggles in one mode but not the other often points to the reversing valve, which is checked as part of every diagnostic. |
| Thermostat & Smart-Control Installation | Standard, programmable, and smart thermostat options, Low-voltage control wiring on HVAC equipment, Compatibility check with existing system, Setup and calibration | Homeowners upgrading from an older thermostat or adding remote-access control | A thermostat that cycles the system incorrectly can offset efficiency gains from newer equipment. Compatibility with the existing system is confirmed before installation. |
| Ductwork Repair & Sealing | Full duct run inspection, Joint and seam sealing, Sections through unconditioned spaces checked, Airflow measured before and after | Homes with uneven temperatures, high energy bills, or ducts running through attics or crawl spaces | Leaking ducts in older Greenwich homes are one of the more common causes of rooms that never quite reach the thermostat setpoint, even with a system that is otherwise working correctly. |
| Indoor Air Quality & Air Filtration | Whole-home air purifiers and filtration, HVAC-integrated humidifiers and dehumidifiers, Allergen and dust control options, Multi-unit and commercial scope | Households with allergy or humidity concerns, and property managers maintaining air quality across multiple spaces | The right filtration or humidity solution depends on the system and the space. Options are covered on the call before anything is scheduled. |
| Seasonal Maintenance & Tune-Ups | Heat exchanger or coil cleaning and inspection, Refrigerant level check, Controls and safety switch review, Efficiency and overall condition assessment | Homeowners and property managers scheduling before the heating or cooling season starts | A maintenance visit in October is the practical way to find a developing furnace problem before a January no-heat call. Spring works the same way for cooling equipment. |
| Oil-to-Gas & Heat-Pump Conversion | Existing system and load assessment, Equipment options reviewed on the call, Gas furnace, heat pump, or combination scope, Price confirmed before any work begins | Fairfield County homeowners moving away from oil heat | The assessment matches the replacement to the building's actual load rather than defaulting to the easiest option. The scope and the price are confirmed before any work begins. |
| Ductless Mini-Split Installation | Outdoor unit and indoor air handler installation, Heating and cooling in a single system, No ductwork required, Multi-zone options for additions or whole-home use | Older Greenwich homes without existing ductwork, additions, finished basements, and converted attics | A mini-split handles both heating and cooling, which makes it a practical solution for non-ducted spaces where adding a full duct system is not feasible. |
| Boiler & Hydronic Heating Service | Circulator pump and expansion tank check, Heat exchanger inspection, Pressure and controls diagnostic, Boiler repair and replacement | Greenwich homes with radiator-based hot water or steam heating systems | Boiler systems are common in older Fairfield County homes and require a diagnostic approach that differs from forced-air equipment. The full system is assessed, not just the unit. |
| Full System Installation & ReplacementMost Popular | Load calculation and equipment sizing, Full system removal and installation, Residential and commercial scope, Price confirmed before work begins | Homeowners, landlords, and commercial clients replacing aging or failed equipment | Sizing the replacement to the actual load of the space matters as much as the equipment brand. An oversized system short-cycles and an undersized one runs constantly. |
| Emergency HVAC Service | No-heat and no-cool calls, Same diagnostic process as a standard visit, Scope and price confirmed on the phone, Calls taken every day 6:30 AM to 9:30 PM | Anyone dealing with a system that has stopped working during a cold stretch or a heat wave | The season and the symptom together narrow the diagnosis before the visit starts. A furnace that trips in January and an AC that stops cooling in August point to different faults. |
How do we know whether to repair or replace an aging HVAC system?
The repair-versus-replace question comes down to a few practical factors: the cost of the repair relative to the cost of a replacement, how many components are showing wear at the same time, and how reliably the system has been running. Older equipment is assessed on its own merits on every visit. If a repair addresses a single failed part and the rest of the system is in reasonable shape, repair is often the right answer. When the repair cost approaches what a new system would cost, or when multiple components are failing at once, replacement becomes the more practical path. We go through what the diagnostic found and what each option involves before anything is scheduled.
What causes a system to short-cycle, and is it a sign of a serious problem?
Short-cycling means the system starts, runs briefly, and shuts off before completing a full heating or cooling cycle. It can come from an oversized system that satisfies the thermostat too quickly, a refrigerant charge that is off, a dirty or restricted filter that triggers a safety shutoff, or a failing control board. Left unaddressed, short-cycling puts extra wear on the compressor and the ignition system. The diagnostic covers the controls, the refrigerant side, and the airflow to identify which situation applies.
How often should heating and cooling equipment be serviced?
Once a year for each system is the practical answer. For a furnace or boiler, a fall inspection before the heating season starts is the right time. For an air conditioner or heat pump in cooling mode, spring works. A heat pump that runs year-round benefits from a check in both seasons. The goal each time is catching a developing problem before the system is under full seasonal load, which is when a failure causes the most disruption.
Diagnosis Explained Before Any Repair
On every visit, what was found and what it takes to fix it is covered before any work is authorized. The repair starts only after the scope and the price are clear.
Why is one room consistently hotter or colder than the rest of the home?
Uneven temperatures from room to room usually point to an airflow or ductwork issue rather than the central equipment itself. A duct that is leaking, disconnected, or undersized for the run will not deliver enough conditioned air to the rooms it serves. A register that is blocked or a damper that has shifted can do the same thing. In some cases, a room that is far from the air handler or poorly insulated will simply respond more slowly to the thermostat. The diagnostic covers the duct run and the airflow at each register to find where the delivery is breaking down.
What does a refrigerant problem look like, and how is it confirmed?
A system with a low refrigerant charge will run longer than it should, struggle to reach the thermostat setpoint on hot days, and may produce ice on the evaporator coil. Refrigerant does not deplete on its own, so a low charge means there is a leak somewhere in the system. Confirming the charge requires taking pressure readings at the outdoor unit. If the charge is low, finding and addressing the source of the leak is part of the repair, not just adding refrigerant and moving on.
What does a strange noise from the HVAC system usually indicate?
The type of noise points toward different parts of the system. A rattling sound often comes from a loose panel, a debris-fouled blower wheel, or a failing motor mount. A squealing or grinding noise from the air handler usually points to the blower motor bearings. A banging or popping sound at startup on a furnace can indicate delayed ignition, which is worth addressing promptly. A refrigerant hiss or bubbling sound on the cooling side often points to a leak. The diagnostic covers the component most likely to be the source based on when the noise occurs and what the system is doing at the time.
Older Systems and New Installs Both Covered
Whether the call is about a boiler that has been in a Greenwich home for decades or a new mini-split going into a finished addition, the work and the diagnostic approach fit the equipment in front of us.
Does someone need to be home during the service visit?
For most service calls, yes. The person who lets the technician in and can describe what the system has been doing is a useful part of the diagnostic process. Access to the equipment, the thermostat, and any areas where the ductwork runs is needed to do the work correctly. For commercial or multi-unit properties, the property manager or building contact typically handles access. The scope of who needs to be present and what access is needed is a practical thing to go through on the call before the visit is scheduled.
How does a dirty filter or coil affect system performance?
A clogged air filter restricts the airflow the system needs to move conditioned air through the space and across the coil. When airflow drops below what the equipment requires, the evaporator coil can freeze on the cooling side, and the heat exchanger can overheat on the heating side. Either situation triggers a safety shutoff or reduces output significantly. A dirty evaporator or condenser coil has a similar effect: the coil surface is where heat transfer happens, and a layer of dirt or debris insulates it and reduces how much heating or cooling the system can actually deliver.
Emergency No-Heat and No-Cool Calls Handled
When a system goes down during a cold stretch or a heat wave, we take the call every day from 6:30 AM to 9:30 PM. The scope and the price are confirmed on the phone before anything is scheduled.
What does a heat pump conversion involve for a home currently on oil heat?
The assessment starts with the existing system and the heating load of the space. A heat pump that is sized correctly for the building and the climate can handle the full heating demand in most conditions, though some Fairfield County installations pair a heat pump with a backup heating source for the coldest nights. The options, the equipment, and what the installation involves are all covered on the call. The goal is matching the replacement to the building rather than defaulting to the easiest install, and the price is confirmed before any work begins.
How long does a full system replacement typically take?
A straightforward residential replacement, where the new equipment matches the footprint and connections of the old system, is usually completed in a single day. A more involved installation, such as a conversion from one fuel type to another, a new ductless mini-split system in a home without existing ductwork, or a commercial replacement with multiple units, takes longer. The scope of the installation and the time it requires are part of what gets confirmed before the work is scheduled.
What is involved in a ductless mini-split installation in an older home?
A mini-split installation places an outdoor unit outside the home and connects it to one or more indoor air handlers mounted in the rooms being conditioned. The connection between the outdoor and indoor units runs through a small opening in the wall, which avoids the need to build out a duct system. Each indoor unit handles a zone independently, which works well for additions, finished basements, converted attics, or whole-home zoning in a property without existing ductwork. The number of indoor units, their placement, and the capacity of the outdoor unit are all part of what gets scoped before the installation is scheduled.
Call (475) 239-2878 to go through what your system needs and get a price before anything is scheduled.
(475) 239-2878