The most common call we get from a place like Derry is a heating system that stopped working overnight. It might be a furnace that won't fire, a boiler that's lost pressure, or a heat pump that's running but not producing any warmth. Those calls come in every day, and we take them every day from 7:00 AM to 10:00 PM. We cover repair, installation, replacement, and seasonal maintenance for homes and businesses across Derry and Rockingham County.
The work runs the full range of residential and commercial heating and cooling. Older homes in this part of New Hampshire often run on oil-fired equipment or hydronic systems that have been in place for decades, and those systems need specific attention when something goes wrong. We also handle ductless mini-split installation, air filtration, thermostat upgrades, and ductwork repair.
If you need a quote, call (978) 992-9593 and describe what the property is doing.
An older thermostat does one thing: it tells the equipment to run. A modern smart thermostat does considerably more. It tracks usage patterns, adjusts the schedule automatically, gives you remote control from a phone, and communicates faults back to the system before they become failures. The gap between the two is not small, and in a home with equipment that's otherwise in good shape, a thermostat swap is sometimes the most cost-effective call you can make.
The other reason to look at the thermostat first is that a control that has stopped communicating correctly can make a functioning system behave as if it's broken. A furnace that short-cycles, an AC that won't hold temperature, or a heat pump that won't switch modes can all trace back to a control issue rather than a mechanical one. We check the controls as part of every diagnostic visit, and the thermostat is confirmed as communicating before sign-off on any job.
If the existing equipment is sound and the behavior is erratic, a thermostat replacement is worth discussing on the call before a larger repair is quoted.
We take calls every day from 7:00 AM to 10:00 PM, including weekends. When you call, the scope of the work gets discussed and a price is confirmed before anything is booked. If the situation is urgent, say so on the call and we'll work through what's available. Emergency no-heat and no-cool calls are handled within those hours, because a property with no heating on a cold New Hampshire night can't wait until the following week.
Not every HVAC call happens in an empty house. Rental properties in Derry need repairs coordinated around tenants who are home during the day. Small businesses and commercial spaces need equipment back online without shutting operations down. When you call, tell us what the property situation is and we'll discuss how to schedule around it. Care is taken with floors and finishes on every visit, which matters in occupied spaces where the work has to happen without disrupting the people inside.
The honest answer is that the price depends on what the fault turns out to be, what has to be reached to fix it, and whether a repair or a replacement is the better answer once the system is properly assessed. A refrigerant charge issue is a different job from a failed heat exchanger, and a ductwork problem is different again. Giving a firm number before the system is looked at is not something we do, because a number pulled from the air before diagnosis is not a quote.
What you get when you call is the rate for the visit and a clear explanation of what it covers. If a repair is needed, that gets quoted before any work begins. Nothing gets replaced before you know why. That applies to parts, to equipment, and to anything else the visit turns up.
If the system is old enough that repair and replacement are both on the table, we'll walk through what each option involves and what it costs. The decision is yours, made with the full picture in front of you.
The visit starts with a conversation about what the system has been doing. That context matters, because a system that failed suddenly tells a different story from one that's been underperforming for a season. The person doing the work goes through the equipment methodically: refrigerant charge, airflow, and controls are all checked before a verdict is given, because the symptom and the cause are often not the same thing.
Once the diagnostic is complete, the findings get explained in plain terms. What was found, what caused it, and what fixing it involves. The price for the repair is confirmed at that point, before any part is ordered or any work begins. If the system needs more than one thing addressed, each item is explained separately so you can decide what to prioritize.
The thermostat is confirmed as communicating before the visit is closed out. The system gets run through a full cycle so the repair can be verified under real operating conditions, not just on the bench.
A house where one room is always too hot or too cold while the rest of the system is working fine usually has an airflow problem rather than an equipment failure. Leaking or undersized ductwork, a damper that's stuck, or an air handler that isn't moving enough volume are the common causes. We trace the airflow through the distribution system before drawing any conclusions about the equipment itself.
A brief burning smell at the start of the heating season is usually dust on heat exchanger surfaces that haven't run in months, and it typically clears within a few minutes. A persistent burning smell, or one that has an electrical character to it, needs to be looked at. A musty smell from the vents points to moisture or mold somewhere in the duct system or on the evaporator coil. Both are worth addressing directly, because they affect indoor air quality across the whole house.
An AC or heat pump that's low on refrigerant doesn't just cool poorly. It runs longer, works the compressor harder, and can ice the evaporator coil if the charge drops far enough. The fix is not simply adding refrigerant. The leak has to be found and repaired first, or the charge will be short again within a season. We locate the leak, repair it, and recharge the system to the correct specification.
These are the components that tell the equipment when to start, when to stop, and how hard to run. A failed capacitor is one of the more common reasons a condenser unit won't start on a hot day. A worn contactor can cause intermittent operation that looks like a refrigerant or compressor problem. A faulty control board can produce almost any symptom. We test these components as part of the diagnostic process rather than replacing them on assumption.
We serve Derry and the towns around it across Rockingham County. That includes Londonderry, Windham, Hampstead, Sandown, and Atkinson. If you're outside that list but nearby, call and we'll confirm coverage for your address.
The work across this area follows the same patterns. Older homes on oil heat or hydronic systems, properties that were built without central ductwork, and additions that the original distribution never properly reached are all common. Ductless mini-splits handle the spaces where running new ductwork isn't practical. Boiler service and oil-to-heat-pump conversion are regular jobs throughout the region. We cover the full range across all of it. Read the services page for what to expect step by step.
It can. Older equipment sometimes requires a different diagnostic approach, and parts availability varies by age and manufacturer. Knowing the approximate age of the system when you call helps us scope the job accurately and have a useful conversation about repair versus replacement before the visit.
Yes. We can assess what has been done, what remains, and what the system needs to be operational. Call and describe the situation and we will talk through what completing the job would involve.
It often does. Many homes in this part of Rockingham County were built before central ductwork was standard, and some still run on the original oil-fired or hydronic heating equipment. That affects both what a repair involves and whether a conversion to a heat pump or gas system is worth considering. When you call, describe what the property has and we'll scope the work from there.
Yes. A property with a hydronic heating system and a ductless mini-split for cooling is a common setup in this part of New England, and we work on both sides of it. The boiler and the distribution loop are on the heating side, and the mini-split handles cooling independently. If either system is having a problem, call and describe what it's doing and we'll confirm what the visit covers.
Yes. If a landlord or property manager wants to set up an arrangement where a tenant calls us directly for heating or cooling issues, that is worth discussing when you contact us. The scope and billing arrangement would be agreed with the property owner or manager beforehand.
You don't need a diagnosis before you call. Describing what the property is doing is enough to get the conversation started and a price confirmed for the visit.
Call (978) 992-9593 and tell us what the system is doing.
We're available every day from 7:00 AM to 10:00 PM, including for emergency no-heat and no-cool calls.
Reach us at (978) 992-9593. We'll get your comfort back on track.
Nearby, we also cover: Salem, Methuen, Haverhill, Nashua, Lawrence.
Below is a plain look at the heating and cooling work we handle across Derry and Rockingham County. Each service is described by what it covers, who it fits best, and one practical detail worth knowing before you call. If a job on this list sounds like what you need, call us and we will scope it out before anything is scheduled.
| System Service | What It Covers | Common Needs | Helpful Details |
|---|---|---|---|
| Heating & Furnace Repair |
| Any home or business that has lost heat or has a furnace behaving inconsistently | Cold snaps on the North Shore can arrive fast. A furnace that short-cycles or produces banging noises on startup is telling you something worth checking before temperatures drop further. |
| Ductwork Repair & Sealing |
| Homes where one or more rooms are consistently too hot or too cold while the rest of the house is comfortable | Leaking ductwork loses conditioned air before it reaches the rooms it is meant to serve. An airflow problem in the duct system can look like an equipment failure until the distribution side is checked. |
| Full System Installation & Replacement |
| Homeowners and building owners replacing an aging or failed HVAC system, or upgrading to a properly sized unit | When both the heating and cooling sides are being replaced at once, sizing the new system correctly for the space is the most important step. We go over the equipment options and the full scope before anything is ordered. |
Call (978) 992-9593 to talk through what your system needs and get a price before anything is scheduled.
(978) 992-9593