Serving Berkley, MA and surrounding areas
Approved
In business since 1999
Free estimates
Customers say: Quick response
"Responded quickly, repaired my air conditioner and awaiting a quote for more work."

Serving Berkley, MA and surrounding areas
Approved
In business since 1999
Free estimates
Customers say: Quick response
"Responded quickly, repaired my air conditioner and awaiting a quote for more work."

Serving Berkley, MA and surrounding areas
Approved (Corporate)
In business since 1989
Free estimates
Emergency services offered
"We are overall very happy with the project. Sila had to install a high velocity air conditioning system in very limited space. They provided a timely quote and showed up and did the work professionally and on time. There were a few hiccups, such as the installation of the hatch to the attic space, but Sila’s carpenter agreed to fix the problem at no additional cost to us, so I consider that to be excellent service. After two weeks, the system has been performing exactly as we hoped."





+6

Serving Berkley, MA and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"We had a central air conditioning unit replaced. Chris was quick to respond via text message. He arrived exactly at the time he said he would, completed the job in less time than expected, ensured the unit was functioning properly before he left. He additionally offered tips and tricks for yearly maintenance on the unit. He was friendly, courteous, and reliable. We would definitely recommend him in the future."

Serving Berkley, MA and surrounding areas
Approved
In business since 1983
Free estimates
Warranties offered
"Nice neat professional installation. Would recommend Majic Air, for all HVAC projects."





+23

Serving Berkley, MA and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Free estimates
Warranties offered
"This was the best service with 2 highly qualified gentlemen. They were both knowlegable and friendly. They arrived 20 minutes after the initial call which was at the end of their day. They could have gone home for the day like the bigger companies did but instead they stopped on their way home and serviced my central air condition system in the middle of a heat wave. Unlike the other companies that I called who couldn't respond for 3 to 5 days even after I explained I had an infant to keep cool. If you're looking for a reliable company MTS is where you should shop"





+50

Serving Berkley, 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."





+27

Serving Berkley, 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!




Serving Berkley, MA and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
Welcome!\n\nAt JN Service HVAC & Plumbing, we’re proud to deliver licensed, insured, and trusted HVAC and plumbing solutions to homes and businesses across Massachusetts.\n\nWith a solid reputation built on Excellence, Commitment, and Responsibility, we help you prepare your home or commercial space for the season ahead — before winter problems strike.\nOur priority is your comfort at home.\n\nWhy Choose Us?\n- 5-star Rated Company: We are a 5-star rated company with more than 1200 satisfied clients.\n- Customer Success: We focus on long-term relationships.\n- Specialist: Expert knowledge and proven skills.\n- Licensed and Insured: Our services are fully insured, providing you with peace of mind.\n- Quality in Everything we do: Best service with the best products.\n- Double-year warranty on labor.\n- Emergency Service: We're ON 24/7 to ensure your well-being.





+5

Serving Berkley, MA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Armus Mechanical is top notch! Our AC stopped working during this heatwave and they were at our home in under 2 hours. We have a medically fragile child that cannot tolerate heat and humidity, so we are beyond grateful for their services. They personally went out of their way to ensure our condenser could be replaced. Very polite, very honest and most professional. I'm not one to write reviews, but Armus Mechanical deserves this. We absolutely 100% recommend them!"





+15

Serving Berkley, MA and surrounding areas
Approved
Super Service Award Winner
In business since 2004
Free estimates
Emergency services offered
"We needed our air conditioner tuned up. Garret was professional, and thorough. We were fortunate that he was going to be in our area the day he contacted us and he came the same day. The company we had last year couldn’t come until late July. He answered a lot of our questions and had some good suggestions. I’d highly recommend him. Jean R. In Rockland"





+24
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.
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