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Avatar for McCrea Heating & Air Conditioning Services of MD
McCrea Heating & Air Conditioning Services of MD
4.5(
318
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Prince Frederick, MD and surrounding areas

Approved

In business since 1936

Free estimates

Emergency services offered

"I couldn't be happier with the service I received from McCrea Heating and Air Conditioning Services of Maryland. Upon returning from vacation on a 100 degree July day, I found my old HVAC system basically dead (90 degrees in my kitchen!) ... Shane immediately came out to provide an estimate, we signed a contract on the spot, and he kindly provided some freon to hold me over until the new system could be installed. Brian and Nick showed up exactly on time to install the unit, used drop cloths to protect my flooring, and were exceedingly polite and professional throughout. I'd highly recommend this organization."
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12 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for The Best Air Quality and Restoration
The Best Air Quality and Restoration
4.8(
236
)
Air Ducts & Vents - Clean

Serving Prince Frederick, MD and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Very professional, courteous, knowledgeable and helpful. They did a good job cleaning my air ducts and treating them for mold. They worked diligently for 1-1/2 hours. I thought the price was very reasonable. I would hire them again."
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+50

Response time10 hrs
Recommended by93%of homeowners
Avatar for Petro Home Services
Petro Home Services
4.3(
103
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Prince Frederick, MD and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"There was a snag at the beginning when they realized, after beginning to dig, that the AC unit was on top of the oil tank and they'd have to call someone in to move it before digging could continue. That delayed things a few days, but thereafter they did a good job of digging and were very careful with our trees. They also took care not to ruin the lawn with the machinery. The new tank and heater were quickly put in the basement with no problems."
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Response time6 days
Response rate100%
18 neighbors recently requested a quote
Avatar for Blue Dot
Blue Dot
4.1(
347
)
Central A/C - Service or RepairCentral A/C - Install

Serving Prince Frederick, MD and surrounding areas

Approved (Corporate)

In business since 1982

Free estimates

Emergency services offered

"Alvin the tech is absolutely the best. Very knowledgeable I learned a lot of things about my AC unit. It’s great customer service with people like Alvin makes glad and know I made the right choice with Blue Dot"
System Installation
400 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for HPC Services
HPC Services
5.0(
13
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Prince Frederick, MD and surrounding areas

Approved

In business since 2024

Emergency services offered

Warranties offered

"I would highly recommend HPC Services! They responded quickly when we called for an estimate on a new heat pump. The gentlemen who were in our home installing the unit were professional and polite and very nice to our little dogs. Sergio stayed and answered all of our questions until late in the evening. They offered us a free duct cleaning and that was completed on Monday after the Friday install. Emmett worked quickly and professionally. He was so very nice and easy to talk to. I was most impressed with the fact that they offer a Veterans discount. If are looking for an amazing company for any HVAC work, I urge you to give them a call!! Karen Hamner"
HVAC
Plumbing
HPC Services HVAC and Plu
HPC Services HVAC and Plu
HPC Services HVAC and Plu

+5

Response time5 hrs
Recommended by91%of homeowners
Avatar for Fixed Right & Guaranteed, LLC
Fixed Right & Guaranteed, LLC
5.0(
7
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Prince Frederick, MD and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

At Fixed Right & Guaranteed, we’re more than just an HVAC company—we’re a local, family-owned business committed to providing exceptional service and building a positive, supportive team culture. Since our founding in 2009, we’ve focused on creating a workplace where our team thrives, earning recognition as Service Nation Contractor of the Year, US & Canada Eastern Region. Our team of Super Techs is expertly coached to go above and beyond, no matter the job. Our mission: We create WOW experiences and exceed the expectations of our clients, our community, our team, and our families.

My jobs
My jobs
My jobs
My jobs
Response time1 day
Response rate100%
21 neighbors recently requested a quote
Avatar for 3MMECHANICAL
3MMECHANICAL
4.9(
30
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Prince Frederick, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Emergency services offered

Warranties offered

"I have two mini split systems in my house and one is completely nonfunctional the other was partially functional. Michael was prompt and had both problems diagnosed in minutes. The main system he fixed in a matter of minutes the second smaller system was actually a manufacturer defect that he found thank goodness. We are just waiting for a new part order to complete the job I am 100% satisfied with his work so far. Will update on completion but the interaction was professional and I already plan to use him on my next project."
SERVICE CALLS
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+8

Response time3 hrs
Response rate89%
Recommended by3%of homeowners
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Air Conditioning questions, answered by experts

No, you should not attempt to replace an AC evaporator coil yourself. This is a complex task that must be performed by a licensed HVAC technician. The process involves handling hazardous and flammable refrigerants, which poses significant safety risks. Attempting a DIY replacement can also cause further damage to your HVAC system and will likely void its warranty. It is necessary to hire a local AC repair professional for this job.

Setting your AC unit to 78 degrees can, indeed, help you save energy. In fact, according to experts, every degree you turn the unit up could save you between 1% and 3% on your energy bills. That said, turning your unit off entirely while you’re out might actually be less efficient than keeping it on at a higher temperature. Why? The unit will need to work extra hard to cool the house back off again after all those hot hours. 

Aside from needing HVAC repair, there are times when you may need to replace your unit. HVAC replacement costs $5,000 to $12,500. Here are some telltale signs that your HVAC unit is going bad:

  • Your unit is 10 years or older.

  • Your home is very humid.

  • The unit keeps cycling without producing cool air.

  • You need to repair the unit frequently.

The standard HVAC warranty is around five years. Still, many brands offer an extension to 10 years if you register the product within a specific timeframe, typically 60 to 90 days post-purchase or HVAC installation. Over the past decade, warranty periods have substantially increased, shifting from 3-5 years in the 90s to the now-prevalent 10+ year warranties. Both warranty types cover parts failing due to manufacturer defects, incurring no additional costs. Some manufacturers provide extended warranties surpassing the usual 15- to 20-year window, though these often involve extra fees. 

You should use a breathable, weather-resistant cover with ventilation. It can be a top cover or a full cover that has mesh to allow airflow. A full, non-breathable cover can cause moisture to build up, leading to rust, frozen parts, and corrosion. A full cover also attracts unwanted critters, such as mice, that can damage the wiring and your unit. If you need to protect your AC unit from falling icicles, choose a sturdy top cover or piece of wood that prevents icicles from damaging your unit.

The Prince Frederick, MD homeowners’ guide to air conditioning services

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