Serving Round Lake, IL and surrounding areas
Approved
In business since 1946
Free estimates
Emergency services offered
"Very well. The tech did a thorough job checking both the furnace and air conditioning unit. He answered any questions we had,"
+2
Serving Round Lake, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2002
Free estimates
Warranties offered
"The service was excellent. Adrian arrived promptly and was professional throughout the service process. We truly feel that there’s a higher level of air quality in our home following the process. I would highly recommend Mr. Duct if you’re in need of high quality air duct cleaning services. Scheduling was also extremely easy and the office was highly and promptly responsive to all of my questions."
+81
Serving Round Lake, IL and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"For all your heating, ventilation, and air conditioning requirements, I highly recommend CR Mechanical Services. Their ability to address problems efficiently and promptly is truly impressive!"
+8
Serving Round Lake, IL and surrounding areas
Approved
Super Service Award Winner
Free estimates
Emergency services offered
Warranties offered
"Very impressed with their heating and air conditioning maintenance. They explained everything clearly, worked efficiently, and left no mess behind. Our home feels fresher after the air duct cleaning. Definitely a trustworthy team you can rely on."
+20
Serving Round Lake, IL and surrounding areas
Approved
In business since 1911
Free estimates
Emergency services offered
"AWE (Air, Water, Energy) did a great job. The installers arrived on schedule and worked all day to removed the old equipment and installed the new equipment. When they were finished, everything looked great and the work area was completely cleaned up. The air conditioner has worked great all summer and kept our house at a comfortable temperature. I am looking forward to a similar experience with the new furnace, also. After the system was installed, AWE sent an inspector to our house to make sure the job was completed satisfactorily (which it was) and take pictures of the equipment to make sure it was installed correctly (which it was).
FYI, we have been a customer of AWE for over twenty years because of the great service they have always provided. This was the 2nd furnace and air conditioner we have purchased from them. They also installed our current water heater. The technicians are always very knowledgeable and friendly. They always arrive when they say they will arrive, and do what they promise. The services provided have always met or exceeding our expectations. I would recommend AWE to everyone.
"
+10
Serving Round Lake, IL and surrounding areas
Approved (Corporate)
In business since 1971
Free estimates
Emergency services offered
"We had a great experience with Four Seasons Heating & Air Conditioning during our recent replacement of our furnace and AC unit. They were very professional and completed the job on time and answered all of my questions. Would recommend them for our Heating, Air Conditioning, Plumbing and Electrical needs."
Serving Round Lake, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Emergency services offered
"This business is the company that bought the older Barrington Heating and Air Conditioning. I have relied on Barrington to service my house furnace and A/C for more than 50 years. They have come to my rescue more than once. My service technicians have become friends, not just repair people."
+1
Serving Round Lake, IL and surrounding areas
Approved
In business since 1973
Free estimates
Emergency services offered
"Outstanding service!! Cahill has been our heating and air conditions company for over 25 years. Installed two systems over this time. High quality work."
+7
Serving Round Lake, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Credit card accepted
Customers say: True professional
"Phil serviced our AC today and he was wonderful. He communicated exactly what what wrong with the unit as well as ways to fix the issue in an affordable manner. He took care of the unit quickly and also installed our new thermostat, without adding the cost to his estimate. I would definitely recommend Phil/One Hour to everyone as everything is working like a charm!"
Serving Round Lake, IL and surrounding areas
Approved
In business since 1998
Free estimates
Emergency services offered
"You absolutely need to hire these guys for whatever heating/cooling project is on your list. We had been ghosted by 4 HVAC companies in 9 months. Carlos Jr. called me at 9AM and by 4:30PM I not only did I have a working AC but I had an all new and upgraded unit. I am so impressed by their quick and QUALITY work. They were kind and understanding."
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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