Serving North Dartmouth, 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 North Dartmouth, 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 North Dartmouth, MA and surrounding areas
Approved
In business since 2015
Free estimates
Customers say: Quality work
"Excellent customer service skills exhibited by the entire team at Family Heating and Air Conditioning. Everybody showed up on time, there was great coordination between support contractors and material delivery. They installed a ducted AC system in our home with minimal inconvenience to us. They are a professional team I wouldn't hesitate to recommend to my family of friends."
+21
Serving North Dartmouth, 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 North Dartmouth, MA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"My on demand heating system wasnt running efficiently so I called the company and they had someone at my home very quickly. Come out inspected my system and gave me alot of information on how it worked and what needed to be done. Very satisfied with the work. Definitely will recommend them to anyone looking for fast and friendly service"
+15
Serving North Dartmouth, MA and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Emergency services offered
Customers say: Quick response
"I called BK and I sent Bernard my information via text. He came the next day prepared with my part. Replaced my pump in my 20 plus year-old washer. He was very knowledgeable and friendly. Got the job done!! Glad to have a local person for appliance repairs."
Serving North Dartmouth, MA and surrounding areas
Approved
In business since 1944
Free estimates
Emergency services offered
"I appreciated being able to speak with someone in the office to explain my situation (leaking water heater), and having someone come to my home so quickly to go over my options for dealing with the problem. Dylan, Aaron and the entire crew were so professional and knowledgeable about the on-demand hot water system we chose to install. They were a pleasure to work with, and I would highly recommend them to friends in need of similar services."
+56
Serving North Dartmouth, MA and surrounding areas
Approved
Super Service Award Winner
In business since 1982
Free estimates
Emergency services offered
"All Phase Mechanical is an excellent company. We called for a quote on a mini split heat/air pump and they came quickly, explained everything, and they were installing the system a week later. The installers Dillon, Chris and Nicholas were amazing. They worked quickly and efficiently, explained everything, and were were professional and very helpful. I highly recommend this company and am going to tell all my friends and family about them. The units are working well, and I appreciate their help with mass save."
+5
Serving North Dartmouth, MA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"I found J&M heating and cooling through Angiâ s list online. I had been a couple of days without AC and within 15 minutes of my entry online they were calling and then they were out to my address to check the problem within 2 hours. They were very prompt, efficient and professional. I would definitely call them again."
Serving North Dartmouth, MA and surrounding areas
Approved (Corporate)
In business since 1984
Free estimates
Emergency services offered
"Quick and efficient work done by Angel Ortiz. He explained the issue and all the work that needed to be done. Definitely recommend ARS for all your heating & air conditioning needs."
+10
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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