Serving Lenoir City, TN and surrounding areas
Approved
In business since 2000
Free estimates
Credit card accepted
"We have been using Admiral Heating and Air for both service and new installation for 16 years. They are always prompt and do an excellent job. The spring and fall maintenance program is a great way to make sure everything is in good working order. John is the best!"
+269
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2017
Credit card accepted
Customers say: Quality work
"Great job guys. Forrest and Jason quickly diagnosed the problem and had my air back on in minutes."
+2
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Amazing! Professional, courteous, honest, and skilled! I will use Smith mechanical heating & air for hvac forever! Highly highly recommend!!"
+3
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Highly recommend honest, great family business"
+6
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Arrived early, friendly, clearly laid out this issues and how to resolve, condo is cooling down now. Great communication as well! I appreciate the fast response to my no air conditioning need."
Serving Lenoir City, TN and surrounding areas
Approved
Free estimates
Offers commercial services
"We needed some help with an electronic air cleaner we had installed by another hvac company (they claimed that the unit was working properly) Martin came by and confirmed that there was an issue. He spent time talking to the manufacturer and then helped us solve the issue in a timely and cost effective manner. He also did a routine yearly cleaning of our A/C unit and the furnace, and we are very pleased with the work and experience. 10/10 for communication, ease of scheduling, and value of the work. I highly recommend Martin for all of your HVAC needs"
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2023
Free estimates
Offers commercial services
"Dustin was very responsive as soon as I entered my request and continued to be very communicative and knowledgeable throughout replacing two fixtures and looking at some outlets. He did great work on what I needed him to do today and I am sure he would do the same on anything else I needed!"
Serving Lenoir City, TN and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Credit card accepted
"Very knowledgeable and honest. I made a call at night and came right over to fix the issue and was not that expensive."
+1
Serving Lenoir City, TN and surrounding areas
Approved
In business since 1991
Free estimates
Warranties offered
"Our A.C went out of course on a Friday night. Wayne was quick to answer the phone, polite, and knowledgeable. He talked me through somethings and provided an affordable quote. He promptly showed up and right away I knew that he knew what he was doing and talking about. Even though it was already late on a Friday night he was kind enough to go out and secure the replacement part that was needed and returned to quickly fix the air. Within about 3 hours of placing my call my air was fixed quickly and at a great rate. Would trust Wayne with all my AC needs in the future."
+3
Serving Lenoir City, TN and surrounding areas
Approved
In business since 2007
Free estimates
Emergency services offered
"Had a new HVAC unit installed and they did a great job! George and his crew were extremely knowledgeable and friendly. They arrived on time and cleaned up after themselves. The cost was reasonable. I’m very happy with their work and will definitely use them again if the need arises. I even recommended them to my 80 year old mom and she was very impressed as well. Mom and I highly recommend!"
+11
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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