Serving Elmira, CA and surrounding areas
Approved
In business since 1982
Free estimates
Warranties offered
"They did a great job, and they were able to fix the problem on our air conditioning."
Serving Elmira, CA and surrounding areas
Approved
In business since 1992
Free estimates
Emergency services offered
"They installed central heating and air in our home in 2025. They were efficient, did a excellent clean up, and friendly. They checked in a week after to make sure we were satisfied with the system and if we had any questions. We are extremely satisfied with the new system. The controls are easy to work and the system is very quiet and efficient."
+5
Serving Elmira, CA and surrounding areas
Approved (Corporate)
In business since 1981
Emergency services offered
Warranties offered
"Technician was prompt and work was completed quickly."
+36
Serving Elmira, CA and surrounding areas
Approved
In business since 2006
Free estimates
Credit card accepted
"kazen was again excellent. they serviced my air in the summer and returned to replace a bad furnace ignighter right away the same day it broke."
Serving Elmira, CA and surrounding areas
Approved
In business since 2016
Free estimates
Small jobs welcome
"Great job installing new air conditioning and attic insulation"
+5
Serving Elmira, CA and surrounding areas
Approved (Corporate)
In business since 1956
Offers commercial services
"Great price, quick efficient service. Very satisfied"
Serving Elmira, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Customers say: True professional
"Contractor was able to help me with Electrical on AC unit, lighting replacment, dryer vent, plumbing. He did great work, fair prices, and had excellent customer service. He even worked with me to replace the GFCI and cord to get our Hot Tub working while we were out of town!! I highly recommend McD Flooring!"
+10
Serving Elmira, CA and surrounding areas
Approved
In business since 1992
Free estimates
Heating, Air Conditioning, Ventilation (HVAC) and Sheet Metal for new and existing residential construction. \n\nWe specialize in high end homes located in the Northern Bay Area. We are known for our quality workmanship and attention to details. We provide contractors, builder and home owners with professional, prompt and quality service. \n\nWe are a family operated business and have serviced North Bay for over 30 years. Our family have operated in the HVAC industry for 3 generations. \n\nOur personnel are highly qualified, professionals and always maintain the highest work ethics. We get the job done quickly and cleanly. \n\nOur value far exceeds our prices!
Serving Elmira, CA and surrounding areas
Approved
In business since 2017
Free estimates
Warranties offered
"I had an outstanding experience with Cobex Air! From the very first call, the communication was clear and professional. Ilya arrived right on time, took the time to thoroughly inspect everything, and explained my options in a way that was easy to understand. You can tell he genuinely cares about doing the job right and making sure his customers feel confident and comfortable. The level of professionalism and attention to detail really stood out to me. It?s not often you find a company that combines skill, honesty, and great customer service like this. I highly recommend Cobex Air and will definitely be using them again for any future HVAC needs!"
+1
Serving Elmira, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"We recently had central AC installed and the entire experience was excellent from start to finish. The team was professional, punctual, and extremely knowledgeable. They took the time to explain the process, answered all of our questions, and made sure we understood how everything would work before getting started. The installation was completed efficiently and with great attention to detail. They kept the work area clean, were respectful of our home, and made sure everything was tested and running perfectly before they left. The difference in comfort is incredible, and the system works flawlessly. It?s clear they take pride in their work and truly care about customer satisfaction. We highly recommend them to anyone looking for reliable, high-quality HVAC service and central AC installation. Outstanding job all around!"
+8
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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