Top-rated air conditioning pros.

Get matched with top air conditioning pros in Leominster, MA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Air conditioning pros in Leominster

Avatar for Conger's Heating & Cooling, Home Heating Oil Delivery & HVAC Services
Conger's Heating & Cooling, Home Heating Oil Delivery & HVAC Services
4.9(
24
)

Serving Leominster, MA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Shawn did an excellent job of replacing my 32-yr old heating system with a 5-zone, Buderus G115, Riello Burner, SuperStor Water Heater, and a "fan-in-a-can" air intake (as furnace is in an enclosed basement closet). He really knows his stuff! He is organized and does a neat, professional job. When he was finished, he tested and marked each zone with me for future identification. I highly recommend Congers Heating & Cooling for quality workmanship and a competitive price."
 Boiler 1
 Boiler 2
 Boiler 3
 Boiler 4
 Buderus

+10

Response time4 hrs
4 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for Landry Mechanical, Inc.- HVAC
Landry Mechanical, Inc.- HVAC
4.5(
107
)

Serving Leominster, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Emergency services offered

Warranties offered

"The price i was quoted over the phone was not the final price for the service. The customer (me) has to ask more probing questions. I have two units to service and was quoted $159 per unit. I told them the units had some mildew and it needed to add refrigerant. The customer service put me on hold for a short time to check what she quotrd me. She said it was the correct amount. The final bill was iver $700."
Mitsubishi Ductless
Furnace install
Water filtration
Stretching out during a hvac install
New heat pump and furnace

+50

Response time11 hrs
Response rate97%
45 neighbors recently requested a quote
Avatar for ENDLESS ENERGY NEW ENGLAND, INC.
ENDLESS ENERGY NEW ENGLAND, INC.
4.7(
20
)

Serving Leominster, 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
18 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)

Serving Leominster, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"From start to finish we have had a great experience with Rodenhiser. Rick Picard came out to look at our system and provided a few estimates for different options while on site. We needed most of our 35 year old central air conditioning system replaced. The communication from the company was impressive. We always knew who was coming and when. They helped with the initial MassSave paperwork and even submitted all of the rebate paperwork for us when the install was complete. Good luck finding another company that will do the same. Our installers (Brian Heno and Dylan E.) arrived on time every day. They were professional, kept us updated on their progress and cleaned up daily. Two very hard working guys. They did a great job with the install. It looks and performs fantastic. We could not be happier with the system now that it is installed. We chose the correct company to work with. This is our second time having Rodenhiser complete a major install at our house. We had them install a furnace several years ago. I highly recommend them for your HVAC needs. Thank you."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
48 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Wotton Heating
Wotton Heating
4.7(
29
)

Serving Leominster, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I would like to recommend Robert from Wotton Heating for your next heating needs. Robert is an incredibly knowledgeable and pleasant tech. I recently moved to my first home and the home heating system was a huge concern to me so i reach out to Robert. As soon as he arrived he was educating me on how the system works and how to maintain it. He answered every question that i had and also provided me with local fuel distributors in my area. He did a great job serving the unit i highly recommend him. Thank you Robert!"
oil burner cleaning
Roth oil tank
Burnham Boiler /tankless
Biasi Boiler
Mitsubishi

+1

Response time1 day
25 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Milltown Plumbing, Heating, AC, Drain Cleaning & Electrical
Milltown Plumbing, Heating, AC, Drain Cleaning & Electrical
4.4(
200
)

Serving Leominster, MA and surrounding areas

Approved

In business since 1979

Credit card accepted

Customers say: Super punctual

"My whole experience in dealing with Milltown was nothing but pleasurable. Their office staff are so professional and courteous. They were very accommodating to my scheduling needs, and even called a half hour before their actual arrival. My air conditioning unit is a bit old and it needed more than just a tune-up unfortunately. The servicer was very helpful in letting me know exactly what was wrong and how I he could fixed it and keep the cost down. He also showed me things about the air conditioning unit that I could do on my own to keep it running efficiently. I was very happy with everything Milltown Plumbing did for me and I would highly recommend there services."
Additional Photos
Additional Photos
Additional Photos
11 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for O'Hara Heating And Cooling
O'Hara Heating And Cooling
4.9(
9
)

Serving Leominster, MA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

OHara Heating And Cooling is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time1 day
Recommended by100%of homeowners
Avatar for Advanced Energy Concepts of Worcester, Inc.
Advanced Energy Concepts of Worcester, Inc.
3.9(
137
)

Serving Leominster, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Top notch vikki had her guys here asap to check my old a/c unit out when the tech said it was gone that Monday the appraiser came out 2 days after that had quote and a week after that install in 1 day . Guys where awesome new what they where doing had it done in no time... highly recommend for any a/c our heating issues awesome people..thank you advance especially vikki she was awesome."
Response time3 days
35 neighbors recently requested a quote
Recommended by48%of homeowners
Avatar for Modern Energy
Modern Energy
4.6(
11
)

Serving Leominster, MA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"The guys at Modern Energy did an excellent job, Ryan was VERY responsive and got me the best deal possible. These past two summers showed how beneficial this type of system mini-splits are. Highly recommend!"
Fujitsu System in Paxton
Mitsubishi Multi-Zone Heat Pump System
Fujitsu System in Paxton
Mitsubishi Multi-Zone Heat Pump System
Fujitsu System in Paxton

+4

Response time3 days
Response rate100%
173 neighbors recently requested a quote
...
Showing 1-10 of 238

FAQs for air conditioning projects in Leominster, 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 Leominster, MA homeowners’ guide to air conditioning services

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