Serving West Dennis, MA and surrounding areas
Approved
Super Service Award Winner
In business since 1983
Emergency services offered
Warranties offered
"Came when promised. Repaired an old central air compressor. saved he day. '"
+101
Serving West Dennis, MA and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Went great. Scheduled more quickly than I expected. They came on time and finished up in less than a day. Looks great and works great! I couldn’t be more pleased."
Serving West Dennis, MA and surrounding areas
Approved
In business since 1944
Free estimates
Emergency services offered
"My electrician from Cotti-Johnson HVAC was a master electrician. If you get him, you are getting the best. I went with the most expensive work package of the 3 that were presented. First off, it was pricey. I knew that going in. I want Cotti-Johnson to understand that I am serious about a working relationship with them. I feel I have done that with their electrical department. Now, if I need their plumbing or HVAC service, our relationship can build off the first experience."
+56
Serving West Dennis, MA and surrounding areas
Approved
Super Service Award Winner
In business since 1996
Free estimates
Emergency services offered
"Braga Brothers provided exceptional service during my gas furnace installation. The team was punctual and efficient, completing the job with confidence and professionalism. They took care to protect my home and explained the system thoroughly, ensuring I understand the new system. I highly recommend Braga Brothers for anyone in need of HVAC services."
+16
Serving West Dennis, MA and surrounding areas
Approved
In business since 1992
Free estimates
Emergency services offered
At Premier Energy Solutions, your comfort and safety come first. We protect your home or business with turnkey, worry-free generator installations, HVAC systems, and electrical work — all backed by unmatched reliability and value.\n\nEvery project is handled by licensed professionals using top installation practices. From backup power to heating and cooling to electrical upgrades, we make it seamless, professional, and built to last.\n\nSince 1992, Premier Energy Solutions has grown from a licensed electrical contractor into a full-service power, comfort, and safety provider. We deliver a complete, turnkey experience — design, permitting, installation, testing, and support.\nGenerators. HVAC. Electrical. One trusted team.
Serving West Dennis, MA and surrounding areas
Approved
In business since 2006
Free estimates
Credit card accepted
"Responded quickly and explained clearly what he could do and when. Would recommend him. Did a great job"
Serving West Dennis, MA and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Great service and great price will use again when needed in the future"
Serving West Dennis, MA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Good Service, on time, reasonably priced, professional."
Serving West Dennis, MA and surrounding areas
Approved
In business since 1992
Free estimates
Emergency services offered
"Paul was very thorough in reviewing his proposal and his reasons for choosing the installation plan. He was accommodating with regard to our work scheduling needs. His installation crew was efficient and professional and restored our property to pre-installation condition."
+13
Serving West Dennis, MA and surrounding areas
Approved
In business since 2020
Free estimates
Small jobs welcome
"These guys are the best! Waited for weeks to get other companies to come to house and then weeks to send estimate ! These guys came in 3 days and emailed estimate in hours! Two weeks later the job was done! Very Professional ! Oh yeah, they were 2 thousand cheaper. Mitsubishi also."
+6
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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