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Best heating and air conditioning pros near Warren, NH

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Top-Rated Heating and air conditioning pros in Warren - Updated Nov 2026

Avatar for Walshco LLC
Walshco LLC
5.0(
19
)
Oil Boiler or Radiator Heating System - RepairOil Furnace / Forced Air Heating System - Repair

Serving Warren, NH and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"I had a zone issue with my forced radiant heat system. They were able to quickly diagnose the issue, and came up with a cost effective solution. I highly recommend them to anyone having furnace issues this winter, and they're super friendly!"
roth 275
roth 275
Roth 160 Gallon Tank
Response time9 hrs
Response rate100%
45 neighbors recently requested a quote
Avatar for Walshco LLC
Walshco LLC
5.0(
10
)
Oil Boiler or Radiator Heating System - RepairOil Furnace / Forced Air Heating System - Repair

Serving Warren, NH and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

WalshCo is a family-owned heating company specializing in oil-fired heating systems throughout New Hampshire and surrounding communities. \n \nOur services include oil tank installations and replacements, oil boiler and furnace installations, heating system repairs, annual maintenance and tune-ups, diagnostics, emergency no-heat service, water heater installations, and oil tank inspections. \n \nWe take pride in providing honest recommendations, quality workmanship, fair pricing, and dependable service. Whether you need a new oil tank, a complete heating system replacement, or fast repairs to restore your heat and hot water, our licensed technicians are committed to getting the job done right. \n \nAs a family-owned business, we believe in straightforward communication, professional service, and treating every customer?s home with the same care and respect we would our own.

Roth 160 Gallon Oil Tank
Roth 160 Gallon Oil Tank
Roth 160 Gallon Oil Tank
Avatar for Kayla
Kayla
New to Angi
Air Ducts & Vents - Clean

Serving Warren, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

I’m Kayla, I have done residential and commercial cleaning for about 15 years, I worked as an LNA for a while in between. A friend and I cleaned airB&B's for a summer, rental homes and even helping with move in and move out jobs. I cleaned for my towns local banks for about 5 years, I worked underneath someone at the time. I am willing to travel to help someone out. I am good with knowing what cleaners you use for each project, I supply my own unless told otherwise. I am a reliable and detail‑oriented house cleaner based in Newport, NH. I take pride in leaving spaces fresh, tidy, and calm. Whether it’s a one‑time deep clean or regular upkeep, I’m consistent, punctual, and careful with people’s homes. I focus on creating a peaceful reset that makes coming home feel lighter.

2 neighbors recently requested a quote
Avatar for UCS Construction and Design
UCS Construction and Design
New to Angi
Air Ducts & Vents - Clean

Serving Warren, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

We are new company just getting started I have a team of licensed professionals I work with. We are very well rounded in our field of work. Doing everything from small handyman repair and installation work to full remodels and renovations. No matter how big or small the job is we are here to help and give great prices and discounts to help home owners and other professionals. Always leaving up to code, quality work, and satisfied customers behind. We also do custom work such as Accent/feature walls that give a home that unique and elegant feel to it.

Avatar for Pasquaney Mech LLC
Pasquaney Mech LLC
4.7(
13
)
Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Repair or Service+9 more

Serving Warren, NH and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"Offered Immediate response to an emergency situation. Extended service area. Extremely helpful. Explained all options in depth. Reasonably priced. Definitely our new "go to guy" for furnace/appliance repair & routine service. Thanks Guys for a job well done."
Master Bedroom Unit
Office
Great room
Novak Install
Novak Install

+6

Response time1 day
Response rate85%
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+47 more

Serving Warren, NH and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Lake Sunapee Heating LLC
4.1(
30
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+47 more

Serving Warren, NH and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"The owner visited and provided an estimate in a timely manner and was very personable.  The estimate was very reasonable and the work began on time.  All workers were professional but it wasn't made clear most of the time, what time they could be expected to arrive on subsequent days after the start."
Recommended by88%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

When faced with HVAC issues, it's best to begin by ensuring the thermostat settings are correct for either heating or cooling. If the system isn't responding, check the thermostat for proper function and power supply. It's also important to examine air filters, as clogged ones can decrease performance. Confirm the power supply to the system by checking the circuit breakers and fuses. If these basic steps fail to resolve the issue, contact an HVAC professional for a more detailed diagnosis and repair.

If your home has an existing forced-air heat system, you can add a central air conditioner to it. An HVAC technician can retrofit your forced-air heating system by installing an evaporator coil onto the furnace plenum, the box next to the furnace that draws in air. Once installed, the air conditioning coils use the furnace’s blower to circulate the air.

Yes, mini-split or ductless AC systems add value to a home and do not devalue it. They are an attractive feature for potential buyers, especially in older homes without existing ductwork, as they provide a practical air conditioning solution without the significant expense and hassle of installing traditional ducts. Ductless systems also eliminate issues associated with conventional ductwork, such as noise and the potential for pests. Furthermore, homeowners value energy-efficient solutions, and mini-splits offer high efficiency for both heating and cooling, plus zoned temperature control. This leads to lower energy consumption and reduced electric bills, which is a major selling point.

You should flush your AC drain line once every three months to keep it clear of debris and buildup. Keeping your AC drain line clean prevents clogs, backups, mold growth, and extra wear on your AC unit. If you live in a humid area or have several furry pets, up your cleaning schedule to once a month.

Ideally, an AC system should never need more Freon (a popular refrigerant) because it circulates in a closed loop. However, refrigerant leaks are not uncommon and may occur gradually over 5 to 15 years. If your system has a leak, it will need to be topped up in a process known as an AC recharge. Signs of a refrigerant leak include weakened AC performance, increased humidity in your home, higher utility bills, and a hissing sound from the unit. The cost of an AC recharge will depend on the size and type of your AC unit, as well as the type of refrigerant it uses.

The Warren, NH homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.