
Serving Exton, PA and surrounding areas
Approved (Corporate)
In business since 1966
Free estimates
Emergency services offered
"Fine but I'm still waiting almost 2 weeks for an estimate on parts that need to be replaced in my air conditioner."





+3


Serving Exton, PA and surrounding areas
Approved (Corporate)
In business since 1966
Free estimates
Emergency services offered
"Fine but I'm still waiting almost 2 weeks for an estimate on parts that need to be replaced in my air conditioner."





+3

Serving Exton, PA and surrounding areas
Approved
In business since 2006
Emergency services offered
Credit card accepted
"I have been using East Coast Comfort for heating and air-conditioning for years and I have always been pleased. They installed a new system for us years ago, did it for far less than other estimates we received, and we have reduced our energy costs because of it."



Serving Exton, PA and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"We recently moved into a house built in 1987 with the original air conditioning unit, which constantly ran without stopping. It was a brutal summer, but it was definitely not running properly. Joe came out himself to take a look. He took a look at the entire system and suggested that we service the AC to make it function properly and not constantly run. He also changed the air filter in the furnace. I appreciated the fact that he did not push a new air conditioning system in the house considering the unit we have is 25+ years old. He also gave us a few ideas on how to make our home more energy efficient. He did a great job.
"





+6

Serving Exton, PA and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"I met with about twelve hvac contractors as my project was a large job that included two systems and duct work. I met Erik last and he was the most straightforward person and did not try to up sell me. He painted the picture of what he would do and was confident in his proposal. When the work started it was smooth and detailed. Erik and his crew answered my many questions which helped me feel more confident. Overall a wonderful experience and value for your money. Erik included many items that other companies did not which helped the end product look and function better. Thank you!"


Serving Exton, PA and surrounding areas
Approved
In business since 2005
Free estimates
Credit card accepted
With over 35 years of experience in the industry it is no wonder why Eco Green Home is the HVAC team for you. Proudly servicing the Chester community, our goal is to keep your home comfortable all year long. \n \nAt Eco Green Home Co our 1st and most important focus is making sure you are comfortable and your Heating / Air Conditioning is working we will respond quickly and be there for you if your Heater or Air Conditioner breaks down or needs replaced. I will work with you when scheduling you like me have limited time to be home from work or your busy schedule. It's bad enough you have a problem with your Heater or Air Conditioner even worse if you have to take off work for it to be repaired. Call and ask about FLEX HOURS so we can be there when it's convenient for you not us.





Serving Exton, PA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"George was awesome - our air conditioner stopped working at noon and he was here by 2pm and got us back up and running by 3pm. Showed me it was just the capacitor and also alerted me to a potential other issue down the road and gave me a quote on it just in case. Pricing was reasonable and I'm gonna use him for service on my unit and furnace as well here on out. I couldn't be happier or recommend him more."





+11

Serving Exton, PA and surrounding areas
Approved
Super Service Award Winner
In business since 1959
Free estimates
Emergency services offered
"Dave did a great job, he explained what caused our Heat pump to stop working. We bought this unit last June 2019 . So we were very upset when the unit stopped working, it was so hot and Dave had to go up into our attic / crawl space. That was super hot, but he was able to find the problem and get our unit to work. We are very thankful for having Dave as our technician. Thank you Dave and Rohrer's One Hour Heating and Air Conditioning. We have been with them for 35 years."




Serving Exton, PA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Simply outstanding. I had been using another company I will not name here, but looking over the HORIZON for help since they could not service my Air Conditioner until August, I turned to Home Advisor. Desperate for help, low and behold up popped Mechanical Monster. Expecting another July/August response, I spoke to this very nice lady, and she said the owner Jeff had an opening the following day! Wow! I was still a bit leery but Jeff showed up, explained to me everything he was doing, made me feel at ease. He found the problem, went above what a normal repairman would do and said you will have Air Conditioning tonight. He was out in the dark, in the rain, getting done. I have not had customer service like that in probably over 30 years. This is a great example of what America used to be, companies going the extra mile to satisfy their customers. This is rare in these times, and I am really blessed to have come upon Mechanical Monster and Jeff. Renews my hope for our great country that there still are companies out there to put their customers first."





+26

Serving Exton, PA and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Toilet re-install because my DIY install caused a ceiling leak. Horizon Services charged a reasonable $376 (with discounts). My only concern was 1 of the 2 workers was not Covid vaccinated. My wife and I are 72 yrs old vaccinated with co-morbidity issues. ALL businesses should notify customers of the COVID vaccination status of employees working in customers' homes. I WOULD RECOMMEND THIS BUSINESS FOR THE WORK. But, they need to amend COVID policy. Once vaccines recive full FDA approval ALL business must require COVID vaccination as a condition of employment."





+18

Serving Exton, PA and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!



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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