
Serving Royal Oak, MD and surrounding areas
Approved
In business since 2025
Free estimates
Warranties offered
"Nate was personable, knowledgeable, and efficient. Service of the finest kind."


Serving Royal Oak, MD and surrounding areas
Approved
In business since 2025
Free estimates
Warranties offered
"Nate was personable, knowledgeable, and efficient. Service of the finest kind."

Serving Royal Oak, MD and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"He installed a pool in a deck and did all the electrical, plumbing Also rebuilt a floating dock and after a hurricane he put a back bay deck area back to perfection. Remodeling a kitchen And painting was a breeze for him. If you have a boat, fixing engines is a cinch for him. There is not much he can’t do!"





+31

Serving Royal Oak, MD and surrounding areas
Approved
In business since 2015
Free estimates
Credit card accepted
10 years of experience Proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!As a family business we take great pride in over 30 years of experience, expertise and quality customer service that we provide to our customers. It is our mission to give you excellent workmanship and customer satisfaction from start to completion of a project.

Serving Royal Oak, MD and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
Locally owned and operated on the eastern shore. Serving Caroline, Talbot, Queen Anne’s, Kent, Dorchester, & Cecil counties. With over 15 years of experience working in the hvac industry. Servicing heat pumps, oil furnaces, gas furnaces, ductless systems, air conditioners. Honest and straight forward technician. Offering service, install, and maintenance.





+1

Serving Royal Oak, MD and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
Durte Contractors. We are a BLACK owned business. We offer an extensive range of services. \nConcrete Drywall property services painting fencing Decks cleaning these are just a few of the services offered but not limited to.

Serving Royal Oak, MD and surrounding areas
In business since 2020
Free estimates
Offers commercial services
"Very knowledgeable in the HVAC field and offered options based on my specific needs. The entire work crew was professional and courteous. They were on time and the job itself was carried out exactly how explained. The business owner was available throughout the project and very responsive and thorough with my requests and questions. The business owner followed up the day after the installation which was a long extremely hot day to make sure the units were meeting all expectations, which they did. I highly recommend HALLS HVAC for HVAC needs."

Serving Royal Oak, MD and surrounding areas
In business since 2017
Free estimates
Offers commercial services
"Excellent mini split installation and service from start to finish. The team was professional, respectful, and very knowledgeable. The energy report was extremely helpful and led to insulation improvements that provided real energy-efficient benefits and cost saving credits. Everything was clearly explained, and the work was done neatly and on time. I highly recommend them."





+8

Serving Royal Oak, 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 Royal Oak, MD and surrounding areas
In business since 1997
Free estimates
Emergency services offered
"It went great these guys were very helpful and upfront I appreciated it plus the price was budget friendly"





+10

Serving Royal Oak, MD and surrounding areas
In business since 1929
Free estimates
Warranties offered
"The work was done neat, efficient, polite and they cleaned up when they were finished! They respected our house!"





+1
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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