#1 AIR Conditioning Maintenance CONTRACTOR IN CHICAGO, IL


We 100% guarantee our air conditioning maintenance in Chicago or we invite you to call the owner.


Know the price of the air conditioning maintenance before any work is done.


A local team that is part of and invested in the Chicago community.


Our certified air conditioning maintenance experts are here to help when you need us most.

Jay Mahlendorf
Jay Mahlendorf
Trustindex verifies that the original source of the review is Google.
Working with A Custom Services Inc, including the engineer Steve S. and Michael in their business office, was all positive and I will happily work with them again. They understood, made helpful recommendations, communicated proactively, and they followed through as they said they would. It was a stress free experience and good value for the work.
Wendy Campnell
Wendy Campnell
Trustindex verifies that the original source of the review is Google.
Steve went above and beyond answering my questions and explaining how things worked. I really appreciated his expertise and patience.
Bill Harris
Bill Harris
Trustindex verifies that the original source of the review is Google.
Alfredo and Tom replaced our furnace and did a Fantastic Job. They were professional, courteous and very informative. They were considerate of the delivery, prepping the area to keep it clean and worked efficiently and very quickly. Alfredo is a master HVAC professional and did a great job! Tom was fantastic on the installation as well as keeping my wife and I informed of the new aspects of the furnace and thermostat. Previous to the replacement Steve responded very quickly for the no heat call and was very professional to diagnose the problem and provide multiple solutions. Steve did an excellent job with the solution write up, planning for the hardware readiness and ensured that our project was completed the next day. Michael in the main office performed all the managerial interaction very well, answered all our questions and took care of the paperwork and invoicing in a very professional manner. Highest grades for this team and I will recommend them to all our friends.
Shauna Daou
Shauna Daou
Trustindex verifies that the original source of the review is Google.
A Custom Service was amazing throughout our experience with them. When I contacted them, Michael called me back promptly and helped me in scheduling an appointment. He also called a day before the appointment as a friendly reminder and to confirm that the appointment still worked for us. Alfredo was the technician who came to our house. He was on time and walked us through everything he was checking. He also answered all of our questions and even answered some questions my neighbor had about his system! He was very thorough, knowledgeable, and professional. After the service, Michael reached out again to make sure everything worked well. We used A Custom Service to do routine maintenance on our radiant heating system, and moving forward we will be using them to address all of our HVAC needs! Job well done.
Alvaro Santana
Alvaro Santana
Trustindex verifies that the original source of the review is Google.
Contacted A Custom Service to get some work done on my boiler. Response was quick, Michael was able to help me set an appointment up and was very attentive to our communications. Alfredo, our technician, was knowledgeable with boiler systems and was able to answer my questions. Found out that a circulation pump needed to be changed and he had the part in his truck so there was no delay in getting us up and running. A Custom Services will be our go to heating service from now on.
Brennan Williams
Brennan Williams
Trustindex verifies that the original source of the review is Google.
Great crew all around, owners, office, technicians. What I most appreciate is that everyone I dealt with was polite and professional. Secondly, they are trying to solve your HVAC issues, not charge you for things you don’t need. Highly recommend.
Natalie Rodriguez
Natalie Rodriguez
Trustindex verifies that the original source of the review is Google.
Always thorough and honest.
Tim Oryhon
Tim Oryhon
Trustindex verifies that the original source of the review is Google.
Michael was very responsive with initially setting up the service technician appointment. Alfredo was very helpful and a wealth of information. Our experience with everyone at A Custom was superb.

Summers in the area are hot and humid, and it’s not too late to call our dependable AC maintenance. Chicago residential and commercial properties have air conditioning units working to maximum capacity during the warm season to keep homes and offices comfortable.

Our NATE-certified technicians are available 24-hours-a-day for an emergency repair in Chicago—call us today.


Before that summer heat arrives, it is crucial to have your cooling system checked by our professional AC repair services. An annual AC maintenance visit assesses your entire heating and air conditioning system to see how it’s working.

Our air conditioning repair technicians have the skills and knowledge to evaluate the air conditioning system properly. Part of the AC tune-up in Chicago is identifying problems and recommending repairs or upgrades to save you money. It also includes:

  • Proper air conditioning installation
  • Testing for refrigerant leaks
  • Disposal of refrigerant where necessary
  • Inspecting, cleaning, and testing the electrical terminals
  • Cleaning the air ducts
  • Checking for leaks or damage
  • Oiling the motors
  • Replacing worn belts

It also looks at current or potential issues with the operation or system parts, allowing you to seek repairs or replacements in time to prevent damage and a critical breakdown.

Air conditioner coils

Air conditioners consist of evaporator coils and condenser coils. The evaporator coils warm the air that moves through the air conditioner. Eventually, these coils can become dirty as dust, debris, and particulate matter air sticks to them. 

Dirt accumulation decreases the ability of both these coil types to cool the air or purify what’s blowing into the room beyond. It also reduces the energy efficiency of the whole unit. The evaporator coils should be checked every year by a professional repair service technician.

The condenser coils pick up just as much debris on the outside parts of the air conditioner. Our team needs to clean these coils regularly as part of our scheduled AC maintenance. Chicago relies on our service technicians to keep things running efficiently, and they are also happy to teach homeowners and businesses how to keep the coils clean throughout the summer.

Keeping the area around the unite as clean as possible will also reduce the dirt on the condenser coils. It may include trimming trees or foliage nearby and unblocking airflow obstacles.

Coil Fins and AC Cleaning, Chicago

Coil fins are another important aspect of AC cleaning in Chicago. These coil fins can bend easily, which may block airflow. Our air conditioner repair technician can show you how to use a “fin comb,” a specialized tool that straightens the coil fins and keeps them in good condition year-round.

Clearing the Condensation Drains

Dirt, dust particles, and debris also clog drainage channels within your air conditioner. If these issues block the drain, the moisture pulled from the air by the evaporator coils will have nowhere to go. It could then back up the system or leak, which leads to other expensive damages.

Our repair technician will show you how to clean these drains periodically. The process is simple and starts by running a stiff wire through them to push debris out of the channel.


Clean filters are the most critical element in any air conditioner. Filters are usually in the return air duct, located in the ceiling, a wall, or within the air conditioner. In ductless systems, the filter is mounted to the grill of the air conditioner.

Dirty or clogged filters flounder under debris and dust, reducing the system airflow and completely blocking the filters in severe cases. The air will bypass the filters, taking dirt and dust directly into the coils and reducing their ability to absorb heat or cool efficiently.

There are a wide variety of filters, including reusable versions, but all need regular cleaning during the summer. Our experts recommend a clean at least every two months during daily use to maintain indoor air quality. If you have pets that shed, or your home tends to be dusty, it might be necessary to clean these filters more often to keep the unit working at peak condition.


Is it necessary to schedule yearly AC maintenance (Chicago and surrounding areas)?

Yes. Like a vehicle requires an annual inspection, your AC requires yearly maintenance to keep it running safely and efficiently. Schedule professional service for your air conditioning unit every year, even when it only operates during the summer. The system needs our annual tune-up to ensure that it runs smoothly into the following season and doesn’t have any major breakdowns when you’re least expecting it.

What kind of AC service does my air conditioner need?

The goal of our AC tune-up is to improve the heating and cooling system’s performance. It boosts efficiency, lowers energy bills, and saves you money. There are several steps in a well-done AC maintenance tune-up with our certified technicians, including:

  • Cleaning the drain lines
  • Cleaning the drip pans
  • Calibrating the thermostat
  • Cleaning and changing air filters

The team will likely also test the entire system in various ways to ensure that it is functioning well and running efficiently.


An annual AC tune-up in Chicago is a low-cost option compared to major repairs. The money you will save by regular services by our trustworthy, experienced AC maintenance service in Chicago will go a long way. Consider it an investment, protecting your home and ensuring comfort and peace of mind.

Annual tune-ups also save money on emergencies and other costs. Regular maintenance helps you avoid substantial replacement and repair costs for an entire system that breaks down at an inopportune time. Why pay for an entire installation or replacement unit when you could just have our team replace the air filters every season?


A Custom Services, Inc., is a family-owned and operated HVAC company serving Chicago, IL. We have served Chicago and the surrounding areas since 1993, with exceptional customer service and fair pricing. Our company delivers high-quality heating and air conditioning service, including installation, AC servicing, and annual maintenance options.

Do you need a preventative maintenance service plan to suit your individual residential and commercial heating and cooling needs? Call A Custom Services, Inc. today for more information about annual AC tune-ups or to schedule a consultation.