AC Repair St. Louis

When your air conditioner isn’t working correctly, call our 24-hour emergency repair service for a quick response and reliable AC service.

No matter how hot it is outside, your AC system should be at its best. However, St. Louis summers can put your air conditioner to the test. At Thomas Hoffmann Air Conditioning & Heating, we know how inconvenient and uncomfortable it is when your air conditioner stops working, especially in the middle of a heatwave.

Call us if your AC system goes out or isn’t blowing out cold air. Our 24-hour emergency repair service ensures that you stay cool.

Based on 301 reviews
Ann Rafferty
Ann Rafferty
Very friendly and professional, they do a great job!
Sharon Shannon
Sharon Shannon
I am delighted with the service I received from the maintenance specialists while replacing the Thermocouple on my water heater. The work was done without issues and completed in less than 30 minutes. I will always recommend this company to anyone needing heating and cooling services. I would also like to mention how this company takes full accountability and responsibility if any repairs are not up to par. Not that I have had that experience. I read the reviews posted on BBB and was very impressed with how Thomas Hoffman and his team explained each situation and the subsequent resolution to the customer's satisfaction.
Clark Vera
Clark Vera
They installed 2 large centralized air systems and did a spectacular job. The installation was professional, they had great respect for both the property and our family as they completed the work in several days. Cleaning was completed as if they had never been here.
Breland David
Breland David
I had my gas ducted heating serviced by them did a fantastic job ! They were quick, friendly and provided great advice. honored the special offer price I received by email, even though the promotion had ended. That's great customer service and I will definitely book my next service with them again. Highly recommend !!

Air Conditioner Repair Services

Whether your cooling system is new or old, Thomas Hoffmann Air Conditioning & Heating can quickly restore the comfort level in your home. With over 30 years of experience, Thomas Hoffmann Air Conditioning & Heating has solved everything from minor issues with calibration to complete system failure.

Almost every homeowner has experienced some issue with their air conditioner. When you experience any decrease in comfort, strange noises or smells from your unit, rising energy costs, or leakage around your system, it’s time to call the experts. Air conditioners, unfortunately, don’t fix themselves. If you procrastinate, the problem will likely worsen and be more expensive. When one component malfunctions, it strains the entire system, leading to further complications.

Common AC Repairs

If you experience a problem with your AC system, it’s good to know some common causes of AC repairs. Below are some of the most common issues AC repair technicians encounter daily throughout the hot summer months. Having a better understanding of these common problems can help you feel more at ease with the air conditioner repair process and better comprehend your AC repair technician’s information.

  • Refrigerant leak
  • Drainage issues
  • Broken compressor fan
  • Frozen condenser coils

Refrigerant Leak

Air conditioners contain refrigerant, which allows the unit to run efficiently by releasing heat from the air to cool it. When an AC unit is installed, it is charged with refrigerant. However, a poor charge or a refrigerant leak can cause the refrigerant level to fall below the correct amount. Several signs may indicate that the refrigerant in your system is low. Some of these include:

  • Vents are not blowing cool air.
  • The temperature you set your thermostat to is never reached.
  • Ice on refrigerant lines
  • The electric bill is higher than average.
  • Hissing or bubbling noise

To fix this issue, your repair technician will first address the leak that was the source of the problem and then charge your cooling system with the correct amount of refrigerant.

Drainage Issues

A second common issue has to do with drainage. An AC system produces condensation, which should flow away from the equipment. However, a clog in the condensate drain lines or drip pan may cause moisture to back into your air conditioner. When there is excess condensation, indoor humidity levels can rise and hinder your cooling system’s performance. It can also cause damage to other components.

To fix this issue, your technician will inspect the condensate lines and drip pan. They will clear any clogs and may be treated for algae growth to prevent clogs in the future.

Broken Compressor Fan

A broken compressor fan is a third common problem. An air conditioner’s outside unit houses the compressor, fan, and condenser coils. These parts release heat from the air, transferring it out of your home. When the fan isn’t working correctly, the heat transfer is hindered. This will not only prevent your AC from adequately cooling your home but also cause the compressor to overheat.

Your technician will diagnose the issue preventing the outdoor fan from working correctly. The fan will be repaired if necessary, and they will inspect the outside unit to see whether the problem has caused further damage to the system.


Frozen Condenser Coils

Frozen condenser coils are the fourth most common issue. These coils are located in the outdoor unit; if they freeze up, your AC will not run properly. When the air can’t flow through your cooling system, it can cause ice to form on the coils. The cause is typically dirty air filters or blocked return air ducts. Low refrigerant could also be the cause, requiring a refrigerant charge.

24/7 Service Call Now

At Thomas Hoffmann Air Conditioning & Heating, we pride ourselves in being a locally owned and operated HVAC company. With more than 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and provide maintenance for your business or home’s HVAC system.

(314) 471-7625