Serving West Islip, NY and surrounding areas
Approved
Super Service Award Winner
In business since 1999
Free estimates
Emergency services offered
"Excellent efficient service! Enjoying a cool house during the heat wave thanks to the excellent work of AR Air Corp."
+173
Serving West Islip, NY and surrounding areas
Approved
In business since 2002
Free estimates
Emergency services offered
"I was very happy with my experience using this company. In the middle of a heat wave, right before the July 4th holiday, my AC stopped working. The man who installed it and had been servicing it was too busy to come for a week. I called MSD and was given an appointment for 8 AM the next morning. They were prompt and courteous, fixed my problem, and were reasonably priced. I will be calling them in the future."
+1
Serving West Islip, NY and surrounding areas
Approved
In business since 2007
Free estimates
Warranties offered
"I hired Joe from MassAir to install Central Air in our home recently. From the start he answered all my questions, always returned my calls quickly, and gave a fair price. He explained exactly what they would be doing and how long it would take, and he and his workers were professional and courteous. They did the job quickly, cleaned up after themselves, and all around provided everything he promised. Overall we are very happy with the work they did, and I would highly recommend MassAir for air conditioning work."
+9
Serving West Islip, NY and surrounding areas
Approved
In business since 1995
Free estimates
Credit card accepted
"Eric is very responsive when you call... Eric and his crew came on time and replaced our Central Air Conditioning System. We had one issue and they came back immediately and took care of it. Eric has great customer service and did a professional job. We would recommend him highly."
Serving West Islip, NY and surrounding areas
Approved
Free estimates
Offers commercial services
"⭐⭐⭐⭐⭐ Absolute Pros – Highly Recommend Legend Air! I cannot recommend Legend Air enough! We recently had them out to troubleshoot our central air and heating system, which ultimately required a full replacement of our outdoor condenser unit. From start to finish, the entire experience was flawless. * **Honest & Diagnostic Expertise:** The technician arrived right on time, quickly diagnosed the issue, and took the time to explain exactly what went wrong with our old unit. I never felt pressured; they laid out all our options clearly. * **Flawless Installation:** The crew that handled the condenser replacement was professional, efficient, and incredibly respectful of our home. They worked fast but didn't cut any corners, ensuring the new central AC and heating lines were perfectly calibrated. * **Top-Tier Customer Service:** Their communication was fantastic throughout the whole process, and their pricing was fair and transparent."
+23
Serving West Islip, NY and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"Jonathan and Crew did an outstanding job on my new Ductless air conditioning system. Great Price, Professional all the way and nice cleanup when done. Answered all my questions and I as their for the whole job. Highly recommend."
+2
Serving West Islip, NY and surrounding areas
Approved
In business since 2012
Free estimates
Customers say: Quality work
"Vinny went way out of his way to go to Montauk to give me an estimate on an air conditioning unit in the downstairs and upstairs. He gave me a great price and kept me informed as to when he was picking up the ductless units and when he was going to install them. He and his son were professional and did a great job."
+54
Serving West Islip, NY and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Anthony repaired & serviced our central air conditioning unit while delivering reliable & dependable service. Would highly recommend him as he is highly qualified and fairly priced."
Serving West Islip, NY and surrounding areas
Approved
In business since 1991
Free estimates
Customers say: Quality work
"Air conditioner died during a heat wave. John came out the same day to assess the problem. Had to take it for repair, and brought it back sooner than promised. Very happy with service."
Serving West Islip, NY and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"I have lived in Deer Park for the last 8 years & I believe in hiring local contractors. We were having issues with our heating & air conditioning unit not having any heat. We called Deer Park Heating & Air conditioning corp & weâ re assured he would get to us that same day. The owner himself came on the job assessed the problem & explained what the problem was, & then repaired it. He did a great job, reasonably priced and never had the same issue again. 2) We were having a heatwave several years ago & of course perfect timing , No A/C. That same day my Son was Best Man in his friendâ s wedding and needing to wear a Tuxedo, Iâ m panicking, & called Deer Park Avenue Heat/A/C the owner came within an hour and fixed my A/C unit Thank God! We never had a problem with it since. Great company & they truly know there business. Thank you again for keeping my family warm In the winter and cool when itâ s roasting outside in the summer. You have a customer for life!"
+188
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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