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Avatar for Venture Mechanical
Venture Mechanical
5.0(
18
)
Central A/C - InstallCentral Humidifier - Install or ReplaceDuctless Mini-split A/C - Install or Replace

Serving Medfield, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"Dylan is very reliable and knowledgeable. He has provided plumbing services many times for us and I wouldn't use anyone but him. The service is exceptional and pricing is extremely fair. I highly recommend Venture Mechanical for any plumbing, heating, or air conditioning needs that you may have."
Steam Boiler Install
Additional Photos
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+27

Response time2 days
Response rate100%
7 neighbors recently requested a quote
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 Medfield, MA and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"SumZero Energy Systems have been excellent in the last several months with supporting the replacement of my air conditioning system in my old condo as well as servicing my furnace. A price comparison with other local companies also prooved SumZero Energy Systems offered the best price. When I purchased a home a few months later, I called them to take a look at my air conditioning system and furnace because I felt as though they had provided such excellent service in the past. It was a no-brainer to ask for consultation regarding the heating and cooling systems in my new home! When I contacted them for assistance or consultation, they are usually quick to respond and provide appointment times had a very convenient window! They have shown up on time to all of the appointments I have had. David S. has always taken the time to explain everything thoroughly and answer all my questions. I highly recommend SumZero Energy Systems!"
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
Avatar for Green Energy Mechanical
Green Energy Mechanical
4.3(
96
)
Central A/C - Service or RepairDuctless Mini-split A/C - Install or ReplaceCentral Air Cleaner - Repair or Service

Serving Medfield, MA and surrounding areas

Approved

In business since 2007

Emergency services offered

Warranties offered

"Our Burnham boiler has been giving us issues this winter after just purchasing the new house over the summer. We've come home a number of times to no heat and a cold house, but had luckily managed to YouTube our way into figuring out fixes. This time unfortunately we couldn't figure it out and needed to search for an HVAC contractor. Green Energy was the first company I could even get to answer my call. At 9am Melissa was able to set me up with a day of appointment, Terry was at our house by 1pm. Since this boiler type is still new to us, Terry was great with explaining the workings of the equipment, and just some general tips for upkeep. It ended up being a simple fix with a loose relay, however I would of never been able to figure that out on my own. Terry ended up also doing a general servicing and cleaning of the unit, which they recommend annually to help the equipment last longer (we're positive the previous owners never did it). I would highly recommend Terry, he was knowledgeable and overall good guy. We also plan to sign up for their annual membership program and use Green Energy moving forward."
 Before
 Space for condenser outside
 After
Traditional Dining Room - Tan Cozy Dark Wood Dining Chairs
 old steam boiler

+17

62 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Pro Heating & Cooling
Pro Heating & Cooling
4.9(
25
)
Ductless Mini-split A/C - Install or Replace

Serving Medfield, MA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"I highly recommend Pro Heating & Cooling . The owner recognized my need for the timely installation of a new boiler system, when other companies callously gave me a window of 3-4 weeks in the middle of freezing weather. To aid the process, the owner also took care of the paperwork needed to apply for a loan, and rebates. This was a complex job, but this company has the teams/expertise necessary to complete the work efficiently."
Oil Boiler Replacement
Single zone DMS
Single zone DMS
Two  Tankless Water Heaters
Response time2 days
4 neighbors recently requested a quote
Recommended by82%of homeowners
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 Medfield, 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
255 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for BK Appliances
BK Appliances
4.4(
811
)
Central A/C - Service or Repair

Serving Medfield, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Emergency services offered

Customers say: Quick response

"MY AC Died July 3rd and it was HOT I called BK and everyone else the morning of the 5th, Bernard was ale to come out that day at about 11am. Bernard was so professional and nice and knowledgeable he really made me feel comfortable and understand what had gone wrong with my AC and why. From now on I will call BK Appliance. I highly recommend them."
Response time5 hrs
Response rate100%
Recommended by94%of homeowners
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Medfield, 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."
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31 neighbors recently requested a quote
Recommended by86%of homeowners
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FAQs for air conditioning projects in Medfield, 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 Medfield, MA homeowners’ guide to air conditioning services

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