Serving Dover, PA and surrounding areas
Approved
In business since 1988
Free estimates
Emergency services offered
"Mike did a fantastic job of installing our furnace and air conditioning units. Highly recommend Mike"
Serving Dover, PA and surrounding areas
Approved
Super Service Award Winner
In business since 1959
Free estimates
Emergency services offered
"Wonderful to deal with. Very prompt service- everyone was so friendly and polite. They explained everything and were able to fix our air conditioning on the spot. Highly recommend."
+16
Serving Dover, PA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Working with Connelly Heating and Air Conditioning was a terrific experience. My mother had her furnace crack and become disabled right before the week of Christmas. Shannon was terrific to work with both on understanding that in the middle of December she could not go without heat, and that funds were limited. He took the time to find us a great replacement and even installed on the weekend to prevent my mother from having to stay in the cold for more than a day. Installation was incredibly quick and done well within our budget. I would recommend Connelly Heat and Air Conditioning to everyone as Shannon is terrific to work with and is there to help. Well worth more than 5 stars and will be the only person I call whenever I have issues with Heating or Air Conditioning."
+2
Serving Dover, PA and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"I would highly recommend Prime Home HVAC. Our air conditioner was out for an entire weekend. I called Nathan on Monday, by Tuesday we had relief!! Nathan and his staff were professional and paid attention to detail. The price was fair and they made it easy. I love that they are a family-owned business. You will not be disappointed."
+3
Serving Dover, 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!
Serving Dover, PA and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Went very well. Tech gave great information on the condition of my unit. As well as provided guidance for upcoming repairs that may be needed."
+6
Serving Dover, PA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Warranties offered
"Our air conditioning system stopped working on a Wednesday evening. We contacted Jay Bee HVAC and scheduled an appointment for the following day. Josh arrived on time and quickly diagnosed the problem with the air conditioning system. He explained what was needed to fix the problem and the cost. He fixed the air conditioning system while working in a temperature of 102 degrees. After completion of the job, he checked the levels on the outside and inside systems to make sure everything was working properly. Very friendly and pleasant to deal with. We would highly recommend Jay Bee HVAC."
+1
Serving Dover, PA and surrounding areas
Approved
In business since 2004
Customers say: Quality work
"My husband and I used Freedom Comfort for new Central Air unit and furnace. Brian did great job and completed work in timely manner. Larry was thorough in breaking down different systems and performance. We are waiting to hear back to schedule another service with them."
Serving Dover, PA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
At Strive Heating & Cooling LLC, we have over 20 years of industry experience, and our team is prepared to go above and beyond for our customers. Our skilled, licensed, and insured team offers unparalleled heating, cooling, and indoor air quality solutions to homes throughout York County, PA and Carroll County, MD. From fast and reliable furnace repair to honest and dependable AC maintenance, we can keep you comfortable all year long. We only use the best products on the market and are authorized Trane, Mitsubishi, and Goodman dealers—meaning our customers only receive the most energy-efficient systems. Call today to learn how our HVAC specialists can help your home.
+15
Serving Dover, PA and surrounding areas
Approved
In business since 2023
Free estimates
Warranties offered
"My home air conditioning wasn't functioning properly. Will Stahl analyzed the problem and had a replacement unit installed in less than 24 hours on the hottest day of the year! You cannot get better or more reliable service that Stahl's Mechanical! And great conversation too!"
+13
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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