Dedham HVAC Company handles the full range of heating and cooling work for homes and commercial properties across Dedham and Norfolk County. Whether you need a furnace repaired, a central air system replaced, a heat pump installed, or a seasonal tune-up before the weather turns, we take the call and get the work scheduled. We give you straight answers about your furnace, AC, and ductwork, and we do not start work until you know the price. Plain questions. Honest diagnosis. Clear options.
Call for a quote: (781) 742-9359. We are available every day from 6:00 AM to 10:00 PM.
When the heat or the AC quits, the call goes to us. We take emergency no-heat and no-cool calls seriously, and we handle both scenarios: a furnace blowing cold air in January, an AC running but putting out warm air in July, a system that will not turn on at all, or a frozen evaporator coil that has shut the whole unit down.
A diagnostic visit covers refrigerant level, airflow through the system, and the controls that tell everything when to run. That gives us an actual picture of what failed before anything is quoted. We do not guess at a part and hope for the best. We are available every day from 6:00 AM to 10:00 PM, including weekends, so you are not waiting until Monday to get someone on the phone.
We'll explain the diagnosis before any work is authorized.
Whether it's a one-time repair or a full system replacement, the process starts the same way: figure out what is actually wrong before pricing the fix. Refrigerant, airflow and controls all checked before a verdict. That matters because the same symptom, say uneven temperatures room to room, can come from a refrigerant leak, a failing blower motor, a dirty evaporator coil, or a duct problem, and each of those has a different answer.
On a repair call, we cover the full diagnostic: condenser and compressor service, air handler and blower inspection, evaporator coil cleaning and assessment, and refrigerant leak diagnosis where the pressures point that way. Residential and commercial work both come through here. A service call at a single-family home in Dedham and a service call at a commercial building in Norfolk County follow the same diagnostic discipline.
You get the price before we schedule the repair. We'll handle the system so you don't have to.
From aging systems to brand-new installs, replacement work starts with sizing the equipment correctly for the space it has to condition. A unit that is too large short-cycles and wears out faster. A unit that is too small runs constantly and never quite catches up. We match the equipment to the home or building before anything is ordered.
Full HVAC system replacement covers the indoor and outdoor units, the air handler, the coil, and the refrigerant line set. For commercial properties, we also handle zoning and comfort-control systems where different areas of the building need independent temperature management. New central air installation in a home that already has ductwork is a different scope than a full system swap, and we walk through what the job covers on the call before anything is scheduled.
Your comfort is the whole job, and it gets treated that way. Call us and we'll handle the rest.
Dedham sits in some of the oldest housing stock in the country. Boiler-fed baseboard heat, oil-fired systems, and homes built long before central air was standard are all common here. The three services below come up constantly in this area, and they each have their own requirements.
Many homes in Norfolk County heat with hot-water boilers that push heat through baseboard radiators or cast-iron radiators room by room. When the system underperforms, the problem is often a zone valve that has stuck, a circulator pump that has lost pressure, or an expansion tank that needs attention. A boiler service call covers pressure readings, zone-by-zone output, and the controls that sequence the zones. This is space-heating equipment, and we handle it as such.
The Northeast holds a large share of the country's oil-heat homes, and Massachusetts is no exception. When an oil boiler or oil furnace reaches the end of its service life, many homeowners use that moment to convert. A conversion involves removing the old oil equipment, installing a gas furnace or heat pump matched to the home's existing ductwork or hydronic layout, and commissioning the new system. Massachusetts has active energy programs around heat-pump electrification, and while the specifics of those programs change, they are worth asking about when you call. We handle heat pump installation and energy-efficiency upgrades as part of this work.
Older homes that were built without ductwork are a natural fit for ductless mini-splits. A mini-split system uses a wall-mounted air handler in each zone connected to an outdoor condenser by a refrigerant line set run through a small penetration in the wall. No ductwork required. This makes them practical for additions, finished basements, and detached structures. They also work well as a zoning solution in homes that already have central air but have one room that never quite reaches the right temperature.
Doing HVAC work right matters, and we'll help you get it right, starting with a tune-up before the season demands anything from the system. Spring is the natural window for AC service: we check refrigerant level, clean the evaporator coil, test the capacitor and contactor, confirm airflow, and run the system through a full cycle. Fall is the window for heating: we inspect the heat exchanger, check ignition and burner operation, test the controls, and verify that the system is ready for a Massachusetts winter.
A tune-up also gives us a chance to flag anything that looks like it is heading toward a failure before it becomes an emergency call. We can also handle thermostat and smart-control installation as part of a maintenance visit if the existing thermostat is not communicating with the system correctly.
Call for a quote on a seasonal tune-up before the busy season starts.
Here's what most people get wrong about their HVAC system: the equipment gets the attention, but the distribution system and the controls are just as likely to be causing the problem. Careful HVAC work that respects your home means looking at all three.
A thermostat that is not reading the temperature accurately, or one that has lost communication with the air handler, will make a perfectly functional system behave erratically. We install programmable and smart thermostats, and we calibrate them to the equipment they are running.
Leaking ductwork is one of the most common sources of uneven temperatures from room to room. Conditioned air that escapes into an attic or a crawl space before it reaches the living area drives up energy use and leaves parts of the home uncomfortable. Duct sealing and repair address that directly.
On the indoor air quality side, we install whole-home air filtration and air purification systems that work with the existing HVAC equipment. If the home has humidity problems, we can also look at whole-home humidifier or dehumidifier options as part of the same conversation.
Homeowners, landlords, property managers, and commercial building operators all call us, and the work looks a little different for each. A homeowner scheduling a furnace repair has one set of considerations. A property manager coordinating access across multiple rental units has another. A commercial building operator who needs a rooftop unit serviced before a tenant complaint escalates has a third.
We handle rental-property and multi-unit work with the scheduling coordination those jobs require. Tenant access, timing, and communication all factor into how the job gets set up. Built for homeowners. Ready for property managers. Ready for your system.
We'll explain the diagnosis before any work is authorized, and the price is confirmed before anything is scheduled.
HVAC pricing depends on what the job actually is. A diagnostic service call, a refrigerant recharge, a blower motor replacement, and a full system replacement are four different scopes with four different price points. System age matters, refrigerant type matters, and equipment size matters. A system running on an older refrigerant type will have different parts availability and cost than a current-refrigerant system.
When you call, we go through the scope on the phone. You get the rate before anything is scheduled, and you are told what the visit covers. If the diagnostic points to a repair, we confirm the repair price before any work is authorized. If the system is past the point where repair makes sense, we talk through replacement options and what those involve.
Ask what it covers and you get a straight answer.
We serve Dedham and the surrounding communities throughout Norfolk County and the greater Boston metro. Nearby towns we cover regularly include Westwood, Norwood, Canton, Needham, Milton, Walpole, Hyde Park, and Readville.
If you are just outside Dedham and not sure whether you are in our service area, call and ask.
At the outdoor unit, the technician checks refrigerant pressure, coil condition, fan motor operation, and the electrical connections at the disconnect. On a heat pump, the defrost cycle controls are also checked, since a defrost board or sensor that is not working correctly can cause the system to ice up or run inefficiently in shoulder-season temperatures. Any debris restricting airflow through the coil gets cleared as part of the visit.
The air handler inspection covers the evaporator coil, the blower motor and wheel, the filter, and the condensate drain. A dirty evaporator coil or a clogged condensate line are two of the more common causes of reduced cooling performance and water damage around the air handler. The controls and the wiring connections are checked as well, since a loose low-voltage connection can cause intermittent faults that are hard to diagnose without a close look.
Before the visit is complete, the system is run through a full operating cycle to confirm it is performing correctly. On a cooling call, that means the system reaches the set temperature and cycles off cleanly. On a heating call, the furnace or heat pump is confirmed to be producing the right output and cycling correctly through the thermostat. If anything looks marginal during the test cycle, it gets noted and discussed before the technician leaves.
A no-heat situation in winter, a no-cool situation during a heat stretch, or a system that has stopped working entirely and cannot be safely restarted are all emergency calls. A furnace that is running but producing less heat than usual is a service call. A furnace that is not running at all on a cold night in Dedham is an emergency.
Call (781) 742-9359 and describe what the system is doing so we can work out the urgency on the phone.
A furnace that is short-cycling, producing less heat than it used to, making a noise it did not used to make, or tripping the pressure switch repeatedly is showing early signs of trouble. A heat exchanger that is cracked or a flame sensor that is coated with oxidation will cause the system to shut down on a safety lockout, which often looks like a furnace that starts and then stops after a few minutes. Catching those symptoms before a full failure gives you more options than a no-heat call in the middle of the night.
An air conditioner that is running but not producing cold air is usually pointing to one of a few causes: a refrigerant leak that has left the system undercharged, a frozen evaporator coil that has blocked airflow through the indoor unit, or a condenser coil that is dirty enough to prevent heat rejection at the outdoor unit. Each of those has a different fix, which is why we check refrigerant pressure, airflow, and coil condition before recommending anything. Running the system continuously when it is not cooling can extend the damage, so turning it off and calling is the right move.
A banging noise on startup often points to a loose component in the blower or a delayed ignition in a gas furnace. A squealing sound from the air handler usually comes from a blower motor bearing that is wearing out. Rattling from the outdoor unit can mean a loose panel, debris in the fan, or a failing compressor. None of these sounds should be ignored, because what starts as a noise often becomes a failure if the underlying cause is not addressed.
Uneven temperatures from room to room, weak airflow at certain registers, or a system that runs constantly without reaching the set temperature can all come from ductwork problems rather than equipment failure. Leaking ducts lose conditioned air before it reaches the living space, and disconnected sections can leave whole rooms without supply air. A diagnostic visit covers both the equipment and the duct system, because the right answer depends on where the air is actually going.
Leaking ductwork allows conditioned air to escape into attics, crawl spaces, and wall cavities before it reaches the rooms it is supposed to condition. The result is a system that runs longer than it should, rooms that never quite reach the set temperature, and higher energy use across the whole heating and cooling season. Duct sealing addresses the gaps and disconnected sections directly, and we confirm airflow improvement at the registers after the work is done.
For a no-heat situation, keep interior doors closed to hold warmth in the rooms you are using, and avoid running portable electric heaters near curtains or furniture. Do not keep resetting a furnace that trips repeatedly on a safety lockout, since the lockout is there for a reason. For a no-cool situation in summer, close blinds on sun-facing windows and move away from upper floors where heat accumulates.
Call (781) 742-9359 and describe what the system is doing so we can scope the situation on the phone before the visit.
A single room that does not match the rest of the house is usually a duct or airflow problem rather than an equipment failure. A damper that is stuck closed, a register that has been blocked, or a duct run that is undersized for the room it serves are the most common causes. Older homes in Dedham that had ductwork added after original construction sometimes have runs that were never sized correctly for the layout. A duct inspection as part of the service call can usually identify the cause.
An AC that is struggling to hold the set temperature on a moderately warm day, one that is cycling on and off more frequently than it used to, or one that is producing ice on the refrigerant line or the indoor coil is showing signs of decline. Refrigerant loss, a failing capacitor, or a compressor that is drawing too much current are all conditions that show up in the diagnostic before they cause a full system failure. Scheduling a service call at the first sign of a problem gives you more options than waiting for the system to stop working entirely.
A ductless mini-split system connects a wall-mounted indoor air handler to an outdoor compressor through a small penetration in the wall, typically three to four inches in diameter, with no ductwork required. Installation involves mounting both units, running the refrigerant line set and the control wiring through the wall penetration, and commissioning the refrigerant charge. A single-zone system for one room can usually be completed in a day, and the result is a fully independent heating and cooling zone that does not depend on the home's existing duct system.
One number. One call. One HVAC tech at your door.
Dedham HVAC Company is available every day from 6:00 AM to 10:00 PM.
Call (781) 742-9359 for a quote on repair, service, installation, or replacement.
Whether it is an emergency no-heat call in February or a planned AC installation before summer, the call starts the same way: a real conversation about what the system needs and what it will cost to address it.
Call (781) 742-9359 and we will take it from there.
Below is a plain look at the heating and cooling work we handle in Dedham and across Norfolk County. Each service comes with a short description of what it covers, who it fits best, and a practical note worth knowing before you call. Read through, find what matches your situation, and call us for a quote.
| Service | What the Service Includes | Common Needs | Things to Know |
|---|---|---|---|
| Oil-to-Gas & Heat-Pump Conversion | Old oil equipment removal, Gas furnace or heat pump installation, Compatibility with existing ductwork or hydronic layout, System commissioning | Homeowners whose oil boiler or furnace is at end of life and considering a fuel switch | Massachusetts has active energy programs around heat-pump electrification. The specifics change, so ask about current options when you call. |
| Ductwork Repair & Sealing | Duct inspection and leak detection, Sealing of gaps and disconnected sections, Airflow confirmation at registers, Attic and crawl-space duct assessment | Homes with uneven temperatures, weak register airflow, or high energy use relative to comfort | Older Dedham homes that had ductwork added after original construction often have runs that were never sized correctly for the layout. |
| Emergency HVAC Service | No-heat calls in winter, No-cool calls during heat stretches, System-down diagnosis, Safety lockout assessment | Anyone whose system has stopped working entirely or is unsafe to restart | We are available every day from 6:00 AM to 10:00 PM. Call and describe what the system is doing so we can scope the urgency before the visit. |
| Heat Pump Repair & Service | Refrigerant and defrost cycle check, Reversing valve diagnosis, Coil and airflow inspection, Controls and sensor test | Homes using a heat pump as the primary heating and cooling source | Heat pumps in Massachusetts shoulder-season temperatures are particularly sensitive to defrost control issues. We check that cycle as part of every service call. |
| Full System Installation & Replacement | Equipment sizing for the space, Indoor and outdoor unit installation, Refrigerant line set and air handler, System commissioning and test cycle | Homeowners or building operators replacing an aging or failed system | Correct sizing matters more than brand. A unit that is too large short-cycles and wears out faster than one matched properly to the space. |
| Seasonal Maintenance & Tune-Ups | Refrigerant level and coil cleaning, Heat exchanger and ignition inspection, Capacitor, contactor, and controls test, Full operating cycle confirmation | Homeowners who want to catch problems before they become emergency calls | Spring is the natural window for AC service. Fall is the window for heating. Scheduling before the busy season means faster appointment availability. |
| Ductless Mini-Split Installation | Wall-mounted air handler placement, Outdoor condenser installation, Refrigerant line set and control wiring, Single-zone or multi-zone commissioning | Older homes without ductwork, room additions, finished basements, or detached structures | A single-zone mini-split installation for one room can typically be completed in a day, with no ductwork required. |
| AC Repair & Service | Refrigerant pressure check, Coil and airflow inspection, Capacitor and contactor test, Controls diagnosis | Homeowners or property managers with an AC that is underperforming or not running | A system running but not cooling often points to a refrigerant issue or a frozen coil. Turning it off and calling early limits further damage. |
| Thermostat & Smart-Control Installation | Programmable and smart thermostat install, Calibration to existing equipment, Wiring and communication check, Zone control setup where applicable | Anyone whose thermostat is reading inaccurately or not communicating with the air handler | A thermostat that is slightly off in its temperature reading can cause the system to run longer than it should on every cycle across the whole season. |
| Boiler & Hydronic Heating Service | Zone valve and circulator pump check, Pressure and expansion tank assessment, Zone-by-zone output test, Controls and sequencing inspection | Norfolk County homes with hot-water baseboard or cast-iron radiator systems | A zone that is not heating is often a stuck zone valve rather than a boiler failure. We check each zone before drawing conclusions about the main unit. |
| Indoor Air Quality & Air Filtration | Whole-home air filtration installation, Air purification system integration, Humidity control assessment, Compatibility check with existing HVAC equipment | Households dealing with dust, allergens, or humidity problems that the standard filter is not addressing | Filtration upgrades work with the existing HVAC equipment and do not require a system replacement to be effective. |
| Heating & Furnace Repair | Ignition and burner check, Heat exchanger inspection, Flame sensor and pressure switch test, Controls and thermostat wiring | Anyone with a furnace that is short-cycling, failing to start, or producing less heat than usual | A furnace that trips its safety lockout repeatedly is telling you something specific. We check the cause before resetting anything. |
How often should I schedule a maintenance tune-up for my HVAC system?
Once a year for a system that handles only heating or only cooling, and twice a year for a heat pump that does both. The practical windows are spring for the cooling side and fall for the heating side, before each season puts real demand on the equipment. A tune-up is also the right time to flag anything that looks like it is heading toward a failure before it becomes an emergency call in the middle of the night.
How do estimates and pricing work before any work starts?
We go through the scope on the phone first. You get the rate before anything is scheduled, and you are told what the visit covers. If the diagnostic points to a repair, we confirm the repair price before any work is authorized. If replacement makes more sense than repair, we walk through the options and what they involve before anything is ordered. The price is settled before we start, not after.
What causes a system to short-cycle, and is it serious?
Short-cycling means the system starts, runs briefly, and shuts off before completing a full heating or cooling cycle. Common causes include an oversized unit that reaches the set temperature too quickly, a refrigerant problem that triggers a safety shutoff, a dirty filter or coil blocking airflow, or a failing component like a pressure switch or flame sensor. It is worth addressing because a system that short-cycles puts more wear on the compressor and the heat exchanger than one running normal cycles.
System Checked Before Parts Are Quoted
We check refrigerant, airflow, and controls before recommending any repair. A diagnosis based on the actual readings is more useful to you than a guess at the most likely part.
What does a thermostat or smart-control upgrade actually involve?
We start by confirming that the new thermostat is compatible with the existing equipment, since some older systems and heat pumps require specific wiring configurations. Installation covers mounting the new unit, connecting the low-voltage wiring, and calibrating the thermostat to the equipment it is running. If the existing wiring is missing a common wire that a smart thermostat needs, we address that as part of the install. After setup, we run the system through a full cycle to confirm the thermostat and the equipment are communicating correctly.
Is older equipment worth repairing, or does it make more sense to replace it?
It depends on the age of the equipment, the cost of the repair, and how the system has been performing overall. A repair that costs a small fraction of replacement value on a system with several good years left is usually worth doing. A major repair on a system that is already past its typical service life, running on an older refrigerant type, or requiring parts that are hard to source is a different calculation. We walk through both options and what each involves so you can make the call with the full picture in front of you.
How do ductwork leaks raise energy bills?
When conditioned air escapes through gaps or disconnected sections in the duct system before it reaches the living space, the equipment has to run longer to compensate. That extra run time shows up directly on the energy bill. In a home where ductwork passes through an unconditioned attic or crawl space, the loss can be significant because the air is not just escaping, it is escaping into the hottest or coldest part of the house. Sealing those leaks reduces the load on the equipment and improves comfort in the rooms that were not getting their full share of conditioned air.
Emergency No-Heat and No-Cool Calls Handled
We take no-heat and no-cool calls seriously and are available every day from 6:00 AM to 10:00 PM. Call and describe what the system is doing so we can scope the situation before the visit.
Do I need to be home for the HVAC work?
For most work, yes. The technician needs access to the equipment, which typically means the indoor air handler, the outdoor unit, and the thermostat. For a service call at a rental property, we can coordinate access with a tenant directly if that is easier for the property manager. We confirm the access plan on the call before the visit is scheduled.
What causes indoor humidity problems, and can the HVAC system help?
In a Massachusetts summer, high indoor humidity is usually a sign that the air conditioner is not removing moisture as efficiently as it should, often because the system is oversized and short-cycling rather than running long enough to dehumidify properly. In winter, low humidity is common in tightly sealed homes where the heating system dries out the air. Whole-home humidifiers and dehumidifiers integrate with the existing HVAC equipment and address both problems without requiring a separate standalone unit in each room.
Older Systems and New Installs Both Covered
From a boiler in a century-old Norfolk County home to a new heat pump installation, we handle the full range of residential and commercial heating and cooling work in this area.
When should I call a technician rather than attempting a DIY fix?
Filter changes and thermostat battery replacements are reasonable DIY tasks. Anything that involves refrigerant, electrical connections at the equipment, gas components, or a system that has tripped a safety lockout is not. Refrigerant handling requires specific equipment and is regulated. A safety lockout exists to prevent damage or a hazard, and resetting it without understanding the cause can make the underlying problem worse. If the system is doing something it was not doing before, a diagnostic call is the right move.
How long does a full system replacement take?
A standard residential system replacement, covering the indoor air handler, the outdoor condenser, the coil, and the refrigerant line set, typically takes the better part of a day. A more complex job, such as a conversion from oil heat to a heat pump in a home with an existing hydronic layout, or a multi-zone commercial replacement, takes longer and the timeline is worked out during the scoping call. We confirm what the job involves and how long it is expected to take before anything is scheduled.
What are the signs of a refrigerant or airflow problem?
A refrigerant problem often shows up as an AC that runs continuously but cannot reach the set temperature, ice forming on the refrigerant line or the indoor coil, or a hissing sound near the indoor unit. An airflow problem looks similar from the outside but has different causes: a dirty evaporator coil, a clogged filter, a failing blower motor, or a blocked or leaking duct. We check refrigerant pressure, coil condition, and airflow before drawing any conclusions, because the symptom alone does not tell you which one it is.
Call us at (781) 742-9359 and we will go through your system, your situation, and your options before anything is scheduled.
(781) 742-9359