Serving Carpentersville, 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 Carpentersville, 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 Carpentersville, IL and surrounding areas
Approved
In business since 2021
Free estimates
Warranties offered
"I had an excellent experience with this HVAC company! They installed 3 central A/C units in my building, and everything was done professionally and efficiently. Special thanks to Angel and Martin for their great work, professionalism, and attention to detail. Highly recommend!"
Serving Carpentersville, IL and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"I recently had Hot Cold Air Company repair my furnace, and I am thoroughly impressed. Their technician arrived promptly, diagnosed the issue quickly, and explained everything clearly. The repair was done efficiently, and my furnace is now working perfectly. I highly recommend Hot Cold Air Company for their exceptional service and professionalism."
+17
Serving Carpentersville, IL and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"He was very good. I had some company coming from out of town and my air conditioning wasn't working. He came that day to fix it. He knows what he is doing. He gets the job done. He came within 1/2 hour of my phone call because he was in the area. He got my air conditioner going right away. It was really hot that day. He took care of it right away. He could have tried to tell me it was the compressor or something, but he didn't. He was prompt, he did a good job, and he was fair. He installed a furnace and air conditioner at my mother's house as well. He did a good job there too. He was here previously to try and quiet down my air conditioning, but nothing seemed to work too well. He was really good on the installation, but I thought he was a little high on the repair. "
Serving Carpentersville, 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 Carpentersville, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Emergency services offered
"They were prompt, friendly and knowledgeable. The problem with my A/C was explained to me clearly and I was back in cool, air conditioned comfort in no time!"
+1
Serving Carpentersville, IL and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1922
Free estimates
Emergency services offered
"Issac was here to chemically clean the air conditioning unit. I've never seen such a dirty unit! He came out and did a great job even though he wasn't feeling well. I'm a nurse, and he decided to stay and complete the job, even though I told him we could reschedule so he could go home and get some rest."
Serving Carpentersville, IL and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
We here at M and D Heating and Cooling take great pride in our expertise, quality and customer service that we provide. We exceed the consumer's expectations. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take our time to communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
+8
Serving Carpentersville, IL and surrounding areas
Approved
In business since 1990
Free estimates
Emergency services offered
"I had the best experience. It was a super hot day and my air conditioner stopped working (it had given me problems in the past and i knew it was time for a new one). Called Keith Lascos heating and cooling; told them the situation and they said they would be out by my house around 5pm. Not only did they show up on time but they completed the installation the very same night. The price was fair and they answered all my questions and ever since I have had no problems with my AC. It was probably the best experience I've ever had with a HVAC company."
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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