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5 Best AC Repair Services in Frederick, MD

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Written By Max Peterson | Last Updated: February 05, 2024

Are you in need of an AC repair in Frederick? Air conditioners (ACs) are key to your family's summertime comfort, but an AC breakdown shouldn't have to break the bank. Frederick's HVAC companies apply the latest technology to design value-focused solutions personalized to your home. Whether it's simple repairs or a full replacement you need, This Old House recommends starting your AC repair company search with these highly-rated Frederick providers.

Top AC Repair Companies in Frederick, MD

May's Heating & Air Conditioning Logo

May's Heating & Air Conditioning

Based on 568 customer reviews.

Services Offered

Filtration Indoor Air Quality Maintenance Emergency Services Ac Installation Ductless Ventilation Furnace Installation Furnace Repair Ac Repair Zoning Systems


  • Informative resources
  • Reliable customer support
  • Clear pricing policy
8420 Gas House Pike Dd, Frederick, MD 301-690-0397 maysheatingandac.com
Honest Air Logo

Honest Air

Based on 135 customer reviews.

Services Offered

Ac Repair Maintenance Emergency Services


  • Clear pricing policy
  • Informative resources
  • Free quote
511 N Bentz St, Frederick, MD 240-931-0112 honestairhvac.com
Markool Heating & Cooling Logo

Markool Heating & Cooling

Based on 278 customer reviews.

Services Offered

Filtration Duct Cleaning Ac Repair Indoor Air Quality Boiler Installation Ductless Furnace Installation Emergency Services Ac Installation Maintenance Radiant Heating Zoning Systems


  • Informative resources
  • Reliable customer support
  • Free quote
5304c Kings Ct, Frederick, MD 301-969-9963 markoolhvac.com
Frederick Air Inc Logo

Frederick Air

Based on 274 customer reviews.

Services Offered

Ac Installation Ac Repair Maintenance Emergency Services Indoor Air Quality Furnace Installation Ductless


  • Free quote
  • Clear pricing policy
  • Reliable customer support
3 King Ave, Frederick, MD 301-663-0300 frederickair.com

More Local Hvac Companies

Dave's Cooling & Heating

User Reviews: 4.6/5 

9022 Walnut St
Union Bridge, MD 21791

Brick Street Plumbing & HVAC

User Reviews: 4.5/5 

47 E All Saints St
Frederick, MD 21701

Advanced Service Air Conditioning & Heating, LLC

User Reviews: 4.6/5 

1929 Mountain Church Rd
Middletown, MD 21769

Exxel Mechanical Services

User Reviews: 4.7/5 

7943 Dollyhyde Rd
Mt Airy, MD 21771

Ferguson HVAC Supply

User Reviews: 4.2/5 

7311 Grove Rd Ste T
Frederick, MD 21704

Honest Air Heating & Air Conditioning (HVAC)

User Reviews: 5/5 

13001 Penn Shop Rd
Mt Airy, MD 21771

Knoxville HVAC LLC

User Reviews: 4.7/5 

3611 Petersville Rd
Knoxville, MD 21758

Holtzople Heating & Air Conditioning

User Reviews: 5/5 

16424 Old Frederick Rd
Emmitsburg, MD 21727

JDC Heating & Cooling LLC

User Reviews: 4.7/5 

36 Bakerton Rd
Harpers Ferry, WV 25425

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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Facts about Frederick
Average Max Temp Percentile: 59.8%
August Average Max Temp: 83.1°F
Climate Zone: Mixed-Humid
Average Energy Cost: $0.11/kWh
Median Year Houses Built: 1988
Average Heat Waves per Year: 0.74

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Common Types of Air Conditioners

HVAC technicians have the expertise to service most air conditioner varieties, but knowing more about what you have can be beneficial. Below, we'll describe each of the common AC types.

  • Split ACs: Split ACs have two main elements: one indoors and one outdoors. They provide quiet operation, improved energy efficiency, ductwork options, and more cooling capability versus mini-splits.
  • Portable air conditioners: As the name hints, portable ACs don't require permanent installation or ductwork. Instead, they remove hot air through an exhaust hose connected to a window or nearby vent. They're a common choice for condos, apartments, or individual rooms.
  • Ductless mini-split: Ductless mini-splits have an outdoor unit and multiple interior units, with no ductwork required. They offer individual room temperature control, flexible installation options, and higher energy efficiency.
  • Central AC: These are the most common home air conditioners, offering consistent, precise temperature control. They feature a central unit that cools air from outside, purifies it, and sends it through ducts to different rooms in your home.
  • Window-mounted ACs: Window air conditioners are a popular choice for Frederick condos, apartments, and townhomes. These compact, affordable units are designed for cooling single rooms and small spaces, and they fit snugly in a window frame or dedicated wall slot. Many window-mounted AC users install their units without professional assistance, though technicians can still help with maintenance and repairs.

How to Choose Your Frederick AC Repair Service

You likely want a swift resolution for your air conditioner's problem. However, before engaging with a repair company, it's important to do careful research to ensure it's the best for your home. Here are a few essential steps to follow.

Confirm the Company Is Properly Licensed and Insured

Maryland HVAC contractors need licensure from the Board of Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) Contractors. A master license requires three years of journeyman experience, 1,875 hours of HVAC work performed in the last year, and a comprehensive trade exam.

Many states and cities also require companies to carry liability insurance. Even if your community doesn't require it, we still recommend choosing an insured company. This will protect you if an accident happens or something gets damaged.

Read Customer Reviews

Read customer reviews on the Better Business Bureau (BBB) website for each company you're interested in. The BBB accredits contractors that respond to complaints professionally and honor their warranties.

It's common for even the best AC repair providers to have both positive and negative reviews. Read each one carefully, and avoid a provider if most reviewers had subpar experiences.

Compare Estimates

We recommend getting at least three different quotes to find the best value. Get a written copy of each quote, and learn more about installer guarantees, permitting fees, manufacturer warranties and emergency repair availability.

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Frequently Asked Questions About AC Repair in Frederick

How much can I expect to pay for AC repair in Frederick?

Your AC repair costs will hinge on your system's make and model and the malfunctioning part. A basic repair job like sorting out a thermostat might cost $150–$250, whereas a more intricate fix like swapping out the compressor will be more expensive.

See the average costs for common AC repairs below.

Common RepairAverage Cost
Clogged air filter$63–$167
Electrical circuits$200–$250
Drainage problems$100–$150
Refrigerant leak$400–$1500
Frozen condenser coils$1,255–$3,765
Fan or air blower issues$150–$200
Compressor replacement$600–$1,590

What do I do if my AC is running but not cooling?

If your AC is running but not cooling, a clogged condenser coil could be the culprit. Normally, the AC’s condenser fan draws air into the outdoor unit through the condenser coil to extract heat energy from your home. A technician can help by clearing the clog or replacing a damaged coil.

How long is my air conditioner's lifespan? When should I consider a replacement?

You won’t need to change air conditioner for 10–15 years with proper maintenance. As your AC grows older, its mechanical parts might become hard to find. You'll probably need to consider new AC installation if your company can't find a broken part.

Should my HVAC company have a private accreditation?

Private accreditations aren't always necessary, but businesses that seek them are typically more trustworthy. The two largest HVAC trade bodies that issue certifications are the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and Air Conditioning Contractors of America (ACCA).

How quickly can an HVAC company in Frederick respond to emergency repair requests?

Some repair companies offer same-day or next-day service for emergency air conditioner breakdowns. However, the specific timeframe will vary depending on the team's schedule, the terms in your contract, and the severity of the issue. For the most accurate info, we recommend contacting the provider directly and explaining the situation.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.