
Serving Palatine, 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 Palatine, 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 Palatine, IL and surrounding areas
Approved
In business since 1904
Free estimates
Emergency services offered
"When my air conditioning stopped working, I first contacted a different HVAC company and the technician made the assessment that the compressor was shot and in need of replacement. They recommended the option of going with a completely new AC unit. I decided to get a second opinion from Shavitz (having seen their sticker on some of the AC units in my building). Cornelius from Shavitz confirmed the initial diagnosis and the estimates that the project manager, Lou, subsequently quoted me were very much in line with what I received from the other company. About $200 more for a comparable AC model, but given what I read about the level of quality Shavitz brings, I decided to go forward with using Shavitz to perform the replacement of my air conditioner. Scheduling the appointment with Chris was a breeze. The day the work was scheduled to be performed, the installation team, Mike D and Mario, arrived exactly on time and quickly got to work. They were professional, friendly, and very knowledgeable about what they were doing. I especially appreciated how thorough they were in the installation and testing of the system. The AC units are on the rooftop of the condo building so there is a long distance between the AC unit and the furnace/AC coil in my condo. Because of this, it took a bit of time to flush the lines, fill with the refrigerant, and test it to make sure it was working as expected. Being a hot day and a Friday, it would have been easy for them to test it to a point where it was “good enough”. Due to the thoroughness of their testing they found an issue in the lines that they were able to fix. While this added time to an already long day, they explained to me what they were doing and the importance of it. All in all, I was very impressed with Mike and Mario’s level of skill and pride they have in their craft. I will absolutely be using Shavitz exclusively going forward for my air conditioning and heating work, and highly recommend them."

Serving Palatine, IL and surrounding areas
Approved (Corporate)
In business since 1938
Free estimates
Emergency services offered
"All temp did great job! My air conditioner wasn't working All Temp came out the same day, found and fixed the leak it in about 2 hours."





+6

Serving Palatine, IL and surrounding areas
Approved
In business since 1986
Free estimates
Emergency services offered
"Besco is one of the best service providers I have worked with. This past summer, I needed a new air conditioner. Then this winter I needed a new furnace. I hadn't worked with Besco before but I knew that they were highly rated here. There were so many positives about the service I received: 1) Easy scheduling, prompt arrival, friendly people 2) Besco's personnel explained very clearly to me my options, pros and cons of various Trane equipment they sell, so that I could make an educated decision. 3) Follow-up - after installation of the air conditioner and furnace, Besco personnel returned (no charge; standard service) both times to make sure the equipment was working right and to make sure I had no questions. 4) Extras - Besco personnel added a wire to my Nest thermostat that they said would ensure that it functioned perfectly with my new furnace. And when I mentioned that the furnace seemed loud, they made some adjustments to my return air grill (and cleaned it!) to reduce the noise. Overall, I couldn't be any happier with Besco. I was really thrilled with the level of service I received. There's nothing enjoyable about having to get a new air conditioner and new furnace, but absolutely trusted Besco's advice and service, and I appreciated how they went above and beyond my expectations, not merely installing the equipment and leaving."


Serving Palatine, IL and surrounding areas
Approved
In business since 1972
Free estimates
Emergency services offered
"Home Comfort Systems replaced my old air conditioner with a new American Standard air conditioner. The day it was going to be installed, one of the owners, Steve, stopped by to look at the old air conditioner, and explain what was going to be done. The installers arrived an hour later, explained to me exactly what they were going to do, and all the specs of the new air conditioner. Roughly 2 hours later, they were finished. They explained the warranty, and cleaned up. The only evidence that they were there was the new air conditioner, no debris left behind. They were very professional, and I would gladly use them again!"


Serving Palatine, IL and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
"Our AC unit had stopped working the previous day, so I called a few local companies in the morning.
The only one that answered without going through voicemail was Jon (the owner) at JML.
After explaining our problem he had a few ideas of the cause, so we scheduled a service call for the same day. He called when he was on his way and arrived on time.
Once here, he checked over the unit and diagnosed the problem. Fixed everything while he was here and kept the price to the service charge.
Jon also gave some advice on a separate issue with the location and sizing of our return air ducts that would make the system more efficient.
"

Serving Palatine, IL and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Fantastic job from first contact through final installation. Highly recommend Simply Comfortable for your HVAC needs."





+2

Serving Palatine, 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 Palatine, 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 Palatine, IL and surrounding areas
Approved
Super Service Award Winner
Free estimates
Emergency services offered
Warranties offered
"Knowledgeable and professional air conditioning service"





+20
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.
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