Serving Grafton, MA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Highly recommend working with NV heating and air conditioning! They did a great job installing our mini splits and would gladly work with them again in the future!"
+6
Serving Grafton, MA and surrounding areas
Approved
In business since 2021
Free estimates
Customers say: Quick response
"Very fast service - had air conditioning condenser not working on a 90F day - he called - showed up within an hour, fixed within an hour! Very happy!"
Serving Grafton, MA and surrounding areas
Approved
In business since 2017
Free estimates
Customers say: Quality work
"Derek was quick to respond to my request for a quote and had our mini split installed within a week. He was friendly, professional, respectful of our property and meticulous. I highly recommend hiring DH Heating and Air Conditioning, you won’t regret it!!"
Serving Grafton, 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!"
+9
Serving Grafton, MA and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Believing that furnace and central air conditioning systems have to be replaced, I asked Nick for an estimate. When he arrived, he diagnosed the problem and fixed it. He saved me a large amount of money. Easy to talk to, explained the issues in understandable terms. He came the same day I called. But if I have another problem, I would not mind waiting because I am confident he will do the job."
Serving Grafton, MA and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Emergency services offered
Warranties offered
"One radiator wasn't working due to air - Ray came back the next morning (on a Saturday!) and made it right. Very pleased!"
+50
Serving Grafton, 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 Grafton, MA and surrounding areas
Approved
In business since 2015
Warranties offered
Small jobs welcome
"Professional HVAC is honest , very professional as well. Ronald showed up on time and he was able to discover the issue with my mini spilt and found the where is the leak. I highly recommended them."
Serving Grafton, MA and surrounding areas
Approved
In business since 1928
Emergency services offered
Warranties offered
"Everything went well. Rodenhiser handled all aspects including obtaining an interest-free 7-year loan, installation of heat pump/air handler, coordination with town inspections, and submission of rebate claim. I would recommend them highly for this type of project."
Serving Grafton, MA and surrounding areas
Approved
In business since 1981
Free estimates
Credit card accepted
"You may have to call a few times, but Jay will always respond. He did a new high end boiler replacement and also installed central air in our home. His price was way under the competitors. Like any contractor, sometimes they are not great at prompt return phone calls and sometimes their schedule gets shifted, but we were very happy with him and have referred him out to several friends."
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.
From average costs to expert advice, get all the answers you need to get your job done.
Use this guide to budget for appliance installation costs based on factors such as appliance type, installation complexity, labor rates, and more.
Explore how factors such as materials, local labor rates, and the type of damage affect the cost to repair a burst pipe.
Use this guide to learn how much rebar costs per foot so you can budget for your next big home improvement project.
Discover how factors such as linear footage, local labor rates, and trim type affect the total cost of painting baseboards.
Learn how much cat or dog door installation costs based on factors like the door size, material, location, and added features.
Discover how much an electric furnace costs based on factors such as unit size, local labor rates, electrical upgrades, and ductwork condition.