
Serving Whitestone, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Premier HVAC Services gave us a premium service. Love their workmanship."





+38


Serving Whitestone, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Premier HVAC Services gave us a premium service. Love their workmanship."





+38

Serving Whitestone, NY and surrounding areas
Approved
In business since 2013
Free estimates
Warranties offered
"Great. Poor Serge worked until almost 9pm to make sure that I was not without heat while I was pregnant during the winter. Wonderful service. Fast and courteous."





+21

Serving Whitestone, NY and surrounding areas
Approved
In business since 2008
Emergency services offered
Warranties offered
"The Appliance Guy (Justin) was exactly what we needed. Straight shooting, to the point, knowledgeable and professional. Repaired our 1930s antique Magic Chef that others quoted us insane amounts to get up and running. Justin came in, did a thorough cleaning, located the issue, repaired the pilot light system and got her up and running at a fair price. So pleased with the outcome of his work. Will 100% use again for future appliance needs."





+3

Serving Whitestone, NY and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Airnizer is superlative in so many ways! Around thirty years ago my husband and I lovingly restored an 1840â  s row house. We didnâ  t see the need to air condition then. However, as the summers got hotter and hotter we realized we had a problem. Since we werenâ  t interested in central air and we didnâ  t want to alter the looks of our home with window air conditioners, we decided that a split system was the answer. We talked with several installers and were extremely impressed with Eugene Kobakâ  s understanding of our aesthetic and practical issues and his ability to anticipate technical concerns. Eugene and his two assistants did not disappoint us. Here are some of the things they did right: â ¢ Itâ  s a small enough company that the owner was on site all day, every day. â ¢ We felt confident that Eugene was a consummate professional who knew exactly what he was doing. â ¢ Eugene worked with us in placing the units as unobtrusively as possible. â ¢ He did an amazing job of making the ducts, etc. blend in with our architecture. â ¢ All the workmen were extremely polite and non-invasive. â ¢ These guys are CLEAN. They left as little mess as possible in such an invasive procedure. â ¢ Eugene and his company stayed with us until the job was finished. They arrived when they promised and worked a full day (sometimes longer!). â ¢ Eugene didnâ  t leave at night until each unit was tested for working perfection. I would recommend Eugene Kobak and his company Airnizer to my best friend. In fact, I plan to!"





+361

Serving Whitestone, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Free estimates
Warranties offered
"I wish there were a rating higher than 5...that's how good they were. Alex S. & Dimitri were professional, courteous, timely and explained every step. I used them to clean out the dryer vent, but will also be hiring this company to clean out the air conditioning vents as well."





+369
Serving Whitestone, NY and surrounding areas
Approved
In business since 1992
Offers commercial services
Customers say: Quick response
"-came on time - curteous service Answer all question Discussed proble with ac system Duscussed reasonal replacement Curtesy check other ac unit for tune up Through in doing job Checked amp usage of ac Checked wire securely Remove old unit Clean up after job done No argument as reasonable offer Overall satisfied service Would recommand to use again for air condition service"

Serving Whitestone, NY and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"The guys Immediately understood the problem and part necessary to replace. They Returned the following day with the part and replaced it quickly. They also helped me understand the problem and made sure the thermostat was working. Very friendly and pleasant team."





+4

Serving Whitestone, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Free estimates
Emergency services offered
"They came right away and examined the central air conditioning. Very courteous and professional"

Serving Whitestone, NY and surrounding areas
Approved
In business since 2015
Free estimates
Small jobs welcome
"PandaHvac was right on the spot with expedited service. The two technicians, Sam and Vlad were extremely pleasant to work with and VERY knowledgeable and helpful answering any and every questions we had."





+19

Serving Whitestone, NY and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
"We had our old boiler removed and a new 250,000 BTU Weil-McLain installed. The experience was great. The price was really fair, especially for the quality of work. They showed up right on time, got straight to work, and you could tell they knew exactly what they were doing. Everything was done in a very organized and professional way, but still felt easy and stress-free on our end. What I appreciated most was how clean and quick they were—no mess left behind, and the job was done faster than expected without rushing anything. Overall, just solid, reliable service. Would definitely recommend them to anyone needing boiler work."





+17
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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