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Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Central A/C - Install - For BusinessCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business+11 more

Serving Littleton, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"Airco is a great family-owned and operated business, very fair and knowledgeable. They replaced our forced air central heating system (oil) in a day, and were quick to respond and get to work despite how busy things were during the January cold-spell. I would highly recommend for your heating and cooling needs!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for Druziako HVAC Inc
Druziako HVAC Inc
4.7(
157
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral Air Cleaner - Install or Replace+1 more

Serving Littleton, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Quick to come out for an estimate and very reasonable. Everything went smoothly and the new air conditioning unit is running great. Haven't had to use the heat yet! They guys were very friendly and professional. No complaints."
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
16 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Dodge Cooling & Heating, Inc.
Dodge Cooling & Heating, Inc.
4.9(
51
)
Central A/C - Service or Repair

Serving Littleton, MA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I would highly recommend Dodge Cooling and Heating. They did a Spring tune up on my central air conditioning system and were extremely responsive, prompt, professional and knowledgeable. I will definitely use them for any future heating and A/C needs that I may have."
Duct Cleaning
Duct Work
Duct Work
Dryer Vent Cleaning
Dryer Vent

+4

Response time11 hrs
1 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for Atlantic Heating & Air Conditioning
Atlantic Heating & Air Conditioning
4.1(
153
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Littleton, MA and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"Excellent service. Atlantic heating and air conditioning is professional, punctual, courteous. Highly recommended."
Response time3 days
Response rate100%
5 neighbors recently requested a quote
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Avatar for Emerald HVAC LLC
Emerald HVAC LLC
5.0(
15
)
Central A/C - Service or Repair

Serving Littleton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"Happy with service. Engineer showed app on time, checked out. The system addressed all my concerns did not do what's unnecessary, great service."
Response time1 day
Response rate93%
28 neighbors recently requested a quote
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Avatar for SumZero Energy Systems, LLC
SumZero Energy Systems, LLC
4.4(
23
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Littleton, MA and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"Fantastic company, would recommend to all friends and family!"
Mitsubishi Heat Pump
MITSUbishi Hyper Heat Heat Pump
Wall Unit (GL Model)
'One-Way' Ceiling Cassette
'Floor Mount' Unit

+9

Response time2 days
Response rate88%
18 neighbors recently requested a quote
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Avatar for ENDLESS ENERGY NEW ENGLAND, INC.
ENDLESS ENERGY NEW ENGLAND, INC.
4.7(
20
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Service or Repair+4 more

Serving Littleton, MA and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

Endless Energy is a trusted local HVAC and Plumbing Company servicing the majority of the state of Massachusetts with office in Marlborough, Needham, and Randolph. Specializing in Heat Pumps, Central AC, Furnaces, and Boilers, we have Master Plumbers, Electricians, and HVAC Technicians all under one roof reducing your need to find multiple contractors! We are also a Mass Save partner and can conduct your no cost Mass Save Home Energy Assessment and install any recommended insulation.\n\nWe can help you with: \n*Heating Repairs, Installation, & Service\n*AC Repairs, Installation, & Service\n*Plumbing Repairs, Installation & Service\n*Water Heater Replacement & Service\n*Indoor Air Quality Solutions\n*Ductwork & Line Set Solutions\n*Electrical Panel Upgrades and Replacement\n*Insulation \n*No Cost Home Energy Assessments\n\nA Mass Save certified contractor with an A+BBB rating. All of our skilled technicians undergo an extensive background and drug screening prior to being hired to our team!

Holliston Heat Pump
Boston Heat Pump
Natick Ducted System
264 neighbors recently requested a quote
Recommended by70%of homeowners
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Avatar for Levasseur HVAC
Levasseur HVAC
5.0(
60
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral Air Cleaner - Install or Replace+1 more

Serving Littleton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Warranties offered

"Extremely helpful with helping pick the right system that worked with our budget."
replace 2 furnaces and ac
replace 2 furnaces and ac
replace 2 furnaces and ac
replace 2 furnaces and ac
replace 2 furnaces and ac

+39

Response time9 hrs
12 neighbors recently requested a quote
Recommended by87%of homeowners
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Avatar for Landry Mechanical, Inc.- HVAC
Landry Mechanical, Inc.- HVAC
4.5(
107
)
Central A/C - Install

Serving Littleton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Emergency services offered

Warranties offered

"Our central air unit died during the hottest days of the year so far. It is a new unit . We called a few places desperate for service and were told it would be a few weeks for most companies to make it out. Called Landrys after finding them on google. A woman called me back less than 20 minutes after first phone call and said they would be out today. Tyler came and was great. Fixed our unit and saved our life! We will be using them in the future for sure. 5 stars for service and their customer service is without a doubt 5 stars as well."
Mitsubishi Ductless
Furnace install
Water filtration
Stretching out during a hvac install
New heat pump and furnace

+50

Response time11 hrs
Response rate97%
17 neighbors recently requested a quote
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Avatar for Green Flow Solution Inc
Green Flow Solution Inc
5.0(
16
)
Central A/C - InstallCentral Humidifier - Install or ReplaceCentral Humidifier - Repair or Service+1 more

Serving Littleton, MA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"Great experience! They were on time, fixed my heat quickly, and explained everything clearly."
Project Photos
Project Photos
Project Photos
Recommended by43%of homeowners
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Showing 1-10 of 372

FAQs for air conditioning projects in Littleton, MA

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Littleton, MA homeowners’ guide to air conditioning services

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

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