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Avatar for Tetteris HVAC
Tetteris HVAC
4.7(
192
)
Central A/C - InstallCentral A/C - Service or RepairCentral Humidifier - Install or Replace+1 more

Serving Unionville, MD and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"My experience with him was top notch. He was accommodating to my schedule. I work nights and he was willing to come to my home in the early evening instead of normal business hours. He assured me the fix of the leak would hold until the end of summer but there was a chance that I may need a new unit next summer since the unit is over 10 years old and the leak was pretty severe. I had no other trouble with the unit the rest of the summer. His price was reasonable and he was friendly and efficienct. If I need a new unit next summer I will definitely use Tetteris Heating and Air for the replacement."
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4 neighbors recently requested a quote
Recommended by94%of homeowners
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Avatar for Weather Masters Corporation
Weather Masters Corporation
4.7(
124
)
Central A/C - InstallCentral A/C - Install - For Business

Serving Unionville, MD and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"They still need to replace the door of the air handler"
Response time2 days
42 neighbors recently requested a quote
Recommended by99%of homeowners
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Markool Heating & Cooling, LLC
4.7(
21
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+10 more

Serving Unionville, MD and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"⭐⭐⭐⭐⭐ Exceptional and Honest Local Service"I cannot recommend Markool Heating & Cooling enough! They were prompt, incredibly professional, and truly care about getting the job done right without overcharging. As a smaller local business, you get highly personalized care and direct communication with the people actually doing the work. They are my go-to for all HVAC needs.""
Response time7 hrs
3 neighbors recently requested a quote
Recommended by84%of homeowners
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Avatar for Wenbrooke Services
Wenbrooke Services
4.6(
107
)
Central A/C - Install

Serving Unionville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Emergency services offered

Warranties offered

"Great company focused on customer service."
Commercial Sign
Dinning room fixture
Commercial Office
Kitchen Pendants
Response time11 hrs
45 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for SPECS Heating & Cooling
SPECS Heating & Cooling
4.8(
17
)
Central A/C - Service or Repair

Serving Unionville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

"I recently had SPECS Heating & Cooling install an AprilAire humidifier for me, and I couldn't be happier with the results. From start to finish, their service was exceptional. The team was professional, knowledgeable, and efficient, ensuring that the installation process went smoothly. Since having the humidifier installed, my indoor air quality has significantly improved, and I've noticed a positive difference in the comfort of my home. I highly recommend SPECS Heating & Cooling for their top-notch service and expertise in HVAC solutions. Five stars all around!"
Response time5 hrs
16 neighbors recently requested a quote
Recommended by50%of homeowners
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Dave's Mechanical Services
5.0(
1
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Unionville, MD and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

Response time4 hrs
Recommended by100%of homeowners
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Avatar for Crafty Puppers Woodworking
Crafty Puppers Woodworking
5.0(
1
)
Window A/C Unit - Install - For Business

Serving Unionville, MD and surrounding areas

Approved

Free estimates

Small jobs welcome

With over 15 years of experience in all aspects of home improvement, I provide high quality results at affordable prices. Every project is personal to me and I will treat your home as I would my own.

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Avatar for Durte Contractors LLC
Durte Contractors LLC
New to Angi
Window A/C Unit - Install - For Business

Serving Unionville, 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.

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Showing 1-10 of 122

FAQs for air conditioning projects in Unionville, MD

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.

The Unionville, MD homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

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