Serving Oakland, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"Outstanding! Efficient, timely, cost effective. Highly skilled technician."





+4

Serving Oakland, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"Outstanding! Efficient, timely, cost effective. Highly skilled technician."





+4
Serving Oakland, MD and surrounding areas
Approved
In business since 2020
Free estimates
Credit card accepted
Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Apex Heating and Cooling, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.
Serving Oakland, MD and surrounding areas
Approved
Free estimates
Emergency services offered
Small jobs welcome
We have 20 plus years in the HVAC/R field. I have serviced all brands of furnaces and cooling units. Commercial and Residential. Veteran and family owned.
Serving Oakland, MD and surrounding areas
Approved
At NxtDoor Heating & Cooling, we’re your local go-to for fast and dependable HVAC service. Whether it’s fixing a unit, routine maintenance, or a full install

Serving Oakland, MD and surrounding areas
In business since 1983
Credit card accepted
"Continental's technicians were highly experienced, professional, considerate, respectful, hard working, and neat. They arrived on-time when scheduled. Allied's drilling and trenching crews were excellent also. This was a big messy job that took about a week and we are very happy with the work that they did. The owner of Continental, Frank Jackson, sold us the system. He provided an extensive reference list that went back at least 15 years. He was on-site for most of the job providing hands-on supervision of his technicians. His technicians are so experienced that he didn't have to be there to supervise them. Rather, I believe he was there to make sure that the job was finished on time because they are so busy. Allied had an on-site supervisor at the start of the drilling process to finalize the location of the loop bores, but their drilling crew was highly experienced and needed no supervision.
Installing geothermal is a messy job. The vertical bores and horizontal trenching for the ground loop makes a muddy mess. The drillers from Allied were very respectful to the property, much more than I expected. I expected that the drilling process would make "a mess and a half" but it only made a mess! At the end of the job the ground was re-leveled and ready for seed, which has already popped and growing grass. As one of the drillers said "the mess only takes grass seed to fix".
The HVAC technicians from Continental left the spaces where they worked in "broom-clean" condition. We had to do some "deep cleaning" afterwards, but this was completely reasonable.
We expressed our concerns about the job to the technicians before they started work because we do not know much about HVAC or geothermal. They took the time to explain what they were going to do and how they were going to do it. They kept us fully informed about their progress and included us in the decision making process when they had more than one way of running a pipe or duct. They made us feel really comfortable and that we were getting a top-notch job.
While the cost for the system from Continental was a little bit higher than their competitors I think we got value for money. In addition to the reference list we received during the sale process, we also know two families that used Continental in the recent past and they are very happy with the work that was performed.
We would use Continental again and would recommend them to others.
If you go with the option to integrate your hot water heater with the geothermal system (which is supposed to reduce the cost of the hot water that you use) I would reccommend that you bite the bullet and have a preheat tank installed at additional cost. We didn't do that and in retrospect we should have based on some further reading that we did about how to get the most bang for the buck from geothermal. It would be easy to install the preheat tank during a new construction project. It would be harder to install the preheat tank during a replacement project (like ours was).
"

Serving Oakland, MD and surrounding areas
In business since 1997
Free estimates
Emergency services offered
"Technicians were very professional and had a lot of knowledge."





+10

Serving Oakland, MD and surrounding areas
In business since 1988
Free estimates
Emergency services offered
"We would definitely recommend Good Shepard! He has done work for me in the past as well as recently doing a complete installation. They completed the job on time, had a friendly crew, and the work area was always left neat. They were knowledgeable and polite. Happy with unit installed."





+14

Serving Oakland, MD and surrounding areas
In business since 2010
Emergency services offered
Credit card accepted
"We own a home-based business which relies heavily on our computers operating efficiently. We have had a service contract with another computer repair business for several years. Recently when we were having problems with our computers, we tried contacting our service contractor multiple times. He never responded. Feeling frustrated, I contacted James at North Alabama Technical Services and explained our situation. He instantly came to our rescue. He "cleaned-up" our computers and took care of all the problems we were experiencing. He went above and beyond to help us in our dire time of need. We would strongly recommend James and his company for computer service needs. We have now retained him on a service contract and are looking forward to working with him in the future."



Serving Oakland, MD and surrounding areas
In business since 1976
Emergency services offered
Warranties offered
"The plumbing was great; I loved them. They were efficient. It has reduced my gas cost; it is great. I would recommend them because they were very professional; from the guy that came out to give me an estimate to the people who called me in the office to make sure I got everything and to the guys who actually did the work. It only took them two days. They were very polite, cleaned up after themselves, and were very fast. Price was actually very good and they were here when they told me they would be here. I am going to have them do another job."

Serving Oakland, MD and surrounding areas
In business since 2005
Free estimates
Emergency services offered
"It turned out well but there was something with the chimney flue that needs to be corrected as it does not shut completely. They provided an estimate for this and it is on our "To Do" list. This was an existing condition and everything went well with the chimney sweep and inspection."



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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