Serving Charlton Depot, 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 Charlton Depot, 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 Charlton Depot, 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 Charlton Depot, 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 Charlton Depot, 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 Charlton Depot, MA and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Punctual, professional, and repaired/properly installed a heating/air conditioning unit that had been previously installed incorrectly. However, we did not call around for pricing. After a poor experience with a lower cost service, we just wanted the job done right. We would definitely call them again."
Serving Charlton Depot, 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."
Serving Charlton Depot, MA and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"First time using Messina Heating & Cooling and we could not be happier with the results. Josiah was extremely polite, professional, and very knowledgeable. He paid great attention to detail and took his time to explain everything. So nice to have an honest and dependable service technician. Pricing is very fair and reasonable. Highly recommend - will definitely be using them for all future HVAC needs."
Serving Charlton Depot, 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!"
+4
Serving Charlton Depot, MA and surrounding areas
Approved
Super Service Award Winner
In business since 1988
Emergency services offered
Warranties offered
"Bob helped me out to replace old ducting for a kitchen hood vent from a smaller size to a bigger one to prepare for new larger kitchen hood that I will be installing. He went above and beyond what I was was hoping for the project including adding a thermal break, additional insulation and damper to the vent that I did not think of. He was great to work with and had great recommendations for future projects at home. I will totally work with him again in the future."
+33
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.
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