Serving Vienna, MD and surrounding areas
Approved
Super Service Award Winner
Free estimates
Emergency services offered
Warranties offered
"Fantastic!!?? They were so helpful, they worked on the for 3 hrs and was able to get it programmed. Mike researched before coming to our home. I would highly recommend Major League HVAC thank you for a job well done!!!!"
+6
Serving Vienna, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Free estimates
Warranties offered
"I’m overly pleased with the work that Wells HVAC provided me. The heating/cooling in my home was antiquated, inefficient & unreliable. However, Michael & his expert-tech remedied those solutions for me. In addition to that; they were punctual in arrival times, they were neat & tidy, and something that stood out to me was their politeness! It feels so good not to be stressed about an unreliable climate & atmosphere in my home now thanks to Wells HVAC. I have, and will continue to highly recommend them to my friends, family, and associates. If you’re on the limb about getting a service done or whom to get it done by… Just call Michael, I promise there will be no regrets or disappointment!"
Serving Vienna, MD and surrounding areas
Approved
In business since 2025
Free estimates
Warranties offered
"Very good job. Very pleased. Definitely recommend Elite HAVC."
Serving Vienna, MD and surrounding areas
Approved
In business since 1990
Free estimates
Small jobs welcome
"Kings Son and Services installed gutter guards on our home. They gave us a good estimate, and scheduled and completed the job swiftly!"
+38
Serving Vienna, MD and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Justin Greenberg was recommended to me for work to be addressed at our 1830’s farmhouse property. Initally I needed to have a small barn/woodshed rebuilt including, siding, roofing, window installation, and painting. The project was completed successfully, within my budget and on time. Justin’s carpentry skills were used to refurbish a utility trailer. An old split rail fence was in need of repair and he secured the materials to bring the fence up to par with the existing fencing. Several of our mature trees needed a degree of topping/trimming. Justin proved to be skilled in this area of landscaping. Justin installed an electric wench/lift in the barn to raise our lawn/garden tractors for servicing. In short, Justin is my go-to handyman for small and large projects ."
+31
Serving Vienna, MD and surrounding areas
Approved
In business since 2011
Free estimates
Customers say: True professional
"Excellent. I have used Boni Landscaping for several jobs. Communication about the project is always great, quality is excellent, and his prices are extremely competitive."
+7
Serving Vienna, MD and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
I bring several years of hands-on experience delivering reliable, high-quality work for homeowners. I’ve worked on a wide range of projects, focusing on getting the job done right the first time while keeping everything clean, safe, and on schedule.\nI serve my local area and am available to travel for jobs when needed. I take pride in being dependable, showing up on time, and communicating clearly throughout every project.\nMy skills include problem-solving, attention to detail, and strong knowledge of tools, materials, and repair techniques. I’m always looking for the best solution that fits your needs and budget.\nHomeowners choose me because I stand behind my work, treat every home with respect, and make sure you’re satisfied before the job is complete.
Serving Vienna, MD and surrounding areas
In business since 2017
Free estimates
Emergency services offered
"One Hour Heating and Air Conditioning Is a very professional company. They were prompt and very knowledgeable. I was so impressed that I signed up for their HVAC maintenance plan."
Serving Vienna, MD and surrounding areas
In business since 1972
Free estimates
Emergency services offered
"I was very pleased both times. It is clear that I am nursing along an old system and it so wonderful to have found someone willing to help me do that. I know eventually I will need to replace the system but just got through two summers with no problems. I am so grateful not to have been pushed into believing that I needed to replace the system yet. Many companies just want to make a sale and are not so willing to help you maintain."
Serving Vienna, MD and surrounding areas
In business since 2010
Emergency services offered
Credit card accepted
"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
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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