8 Causes of Commercial Air Conditioner Repair

8 Causes of Commercial Air Conditioner Repair

A broken AC unit is frustrating, but a commercial air conditioner that is continually having problems is a serious problem. Whenever your building cannot rely on consistent AC, especially during the hot summer months, it is time to find the source of the problem and get it fixed. There are eight common causes of commercial air conditioner repair and ways to prevent them from recurring in the future.

commercial air conditioner repair


Air conditioning units are exposed to all of the weather elements outside and are not immune to dirt and debris interfering with the system. If you have not cleaned or checked your outdoor AC system in awhile, debris could have built up causing damage to fan blades, fan belt, motors, or other internal mechanisms. Check for stones, sticks, leaves, and gravel in your system that could have damaged or interrupted operation.

Dirty Air Filter or Coils

The same with debris, since your unit is outdoors it can become dirty more quickly than other HVAC components. Coils that have a thick enough layer of dirt or grime will stop working, causing a need for commercial air conditioner repair when the other parts of the system are worn down to compensate for the lack of heat transfer.

The air filter should be regularly changed to maintain good air quality and to help the system function better. When the filter is dirty and clogged, the air will push back instead of flowing through the system. This makes your air conditioning unit work harder to do the same job and can lead to a frozen evaporator coil.

Frozen Coils or Fan Problems

As you read above, a frozen evaporator coil is the result of air flow restrictions. Usually a frozen coil is a cause for commercial air conditioner repair, but not necessarily the only repair that is need. A number of things can restrict the heat transfer and air flow that keeps the coil warm, causing the layer of ice to build on it. You will know your coil is frozen when there is either no air coming from your vents or warm air when the thermostat is set for AC.

Frozen coils hint at other problems that need to be fixed during your commercial air conditioner repair and the same goes for fan problems. There are two fans in your system – one that expels the heat and one that cools the air to reach your building. Debris, dirt, worn belts, motor issues, and little to no lubrication will cause one or both fans to malfunction.

Low Refrigerant

One of the most common issues the causes commercial air conditioner repair is low refrigerant. Refrigerant needs to be recharged semi-regularly, but needing charges too often indicate that there is a leak in your system which leads to bigger issues. If your system is working harder to maintain a cool temperature, making a hissing noise, or is developing frost, then you may have a refrigerant leak issue.

Clogged Drains

To cool your building, the air conditioning unit has to produce a lot of moisture that has to go somewhere. Using drain lines, the moisture is redirected out of the system. If there are clogged drains, the moisture will back up into the system or cause damage to your ceilings or walls by redirecting into your building.

Leaking Ducts and Thermostat Issues

Sometimes the cause of your commercial air conditioner repair has nothing to do with the unit itself but with other pieces of the system. If there are holes or breaks in your air ducts, it can cause air leaks which will inefficiently find its way between your walls instead of circulating in your air. There could also be calibration issues with your thermometer, especially if it is out of date. Having a commercial HVAC technician look at your thermostat wiring will help you decide if that is the issue before going through a full AC repair.

Electrical Wiring Issues

Depending on the age of your commercial air conditioning system, there could be electrical wiring issues that are transmitting the wrong signals throughout your system. This could cause a malfunction with the temperature of the air or cause the air conditioning unit to work improperly. If you have noticed trips in your circuit breaker relating to the AC system, call an HVAC technician.

Lack of Maintenance Prompting Commercial Air Conditioner Repair

Ongoing maintenance is an important part of keeping your commercial air conditioning system free of repairs and other issues. When you neglect preventive maintenance, you put your system at risk for breaks and expensive repairs. Talk to your commercial HVAC company about preventive maintenance plans to avoid a major commercial air conditioner repair in the future.


- Preventative Maintenance is key to the longevity of your equipment
- Why leave your systems to chance?
- Is your water safe?



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