When the weather gets hot, you expect your air conditioner to keep your building cool and comfortable. Unfortunately, AC systems are susceptible to a wide range of problems. One of the most common issues faced by building owners is an AC fan that suddenly stops working.
Common Reasons AC Fans Stop Working
When an AC fan stops spinning, it no longer blows cold air into your building. As the temperature starts to rise, you may be in a hurry to pinpoint the problem and find a solution. This may be easier said than done if you are not familiar with commercial air conditioners. With the help of a HVAC professional, you can quickly diagnose your commercial AC unit and choose a suitable repair. Here is a look at some of the most common causes of an AC fan not working.
Dirt or Debris Inside the Unit
Even the best-maintained air conditioners will gradually collect dirt and debris over time. This is because the indoor blower fan that sucks in warm air from the building can also suck in pollutants from the air. When dirt, dust and debris start to accumulate, you may experience problems with your commercial AC unit. While the air filter is designed to help trap dirt and debris, contaminants can still find their way inside your air conditioner.
Too much dirt and debris inside your air conditioner unit can mean a catastrophe for your AC fan. Dust and dirt can combine with oils and other liquids creating a sticky substance that makes it difficult for the fan to spin unhindered. In addition, debris can become lodged in the fan preventing the blades from spinning. Cleaning out your commercial AC unit can help stop these types of problems.
Compressor is Malfunctioning
There are a number of issues that can cause your AC compressor to malfunction. Sometimes the issue is something as simple as a loose wire or clogged air filter. However, when the compressor malfunction causes the entire system to break down, you have a more complex problem on your hand.
Your commercial AC system cannot function without the compressor. In some cases, the compressor may also cause the AC fan to stop working. This can be caused by dirty coils, clogged suction lines or the wrong suction line size. Sometimes a compressor may start malfunctioning if there is a low refrigerant charge due to cracks or holes in the lines. Too much refrigerant or electrical problems may also be to blame.
Unit is Not Getting Power
When your commercial air conditioner simply fails to turn on, you might be dealing with a power issue. Without power, none of the components of the AC system will work, including the fan. Oftentimes, when the outdoor unit does not turn on, it is because the circuit breaker has been tripped. The fix usually involves resetting the tripped breaker on the circuit breaker panel.
If the AC unit still does not power on or if the breaker has not been tripped, it may be due to the unit’s thermostat. If your HVAC professional discovers that the thermostat is nonresponsive and is failing to communicate with the rest of the AC system, the thermostat may need to be replaced.
Motor is Burnt Out
While the fan motor inside your commercial air conditioner is a simple part, it is also vital to the operation of your unit. As the fan motor is one of the hardest working parts inside an AC system, it tends to break down more frequently. You may have a failing AC fan motor if the fan does not start even though the AC is on or if the fan continues to run even when everything is shut off.
Other common signs that your motor is burnt out is if the fan is on but rotating slowly or if the fan runs but only intermittently. You may also hear a buzzing or rattling sound coming from the condenser when the fan is turned on. To confirm the problem, your HVAC professional will perform a visual inspection, check the temperature of the condenser, check the capacitor and electrical wiring and try to manually kick-start the motor. If the motor is burnt out, it will need to be replaced.
Contact the HVAC Pros to Avoid the Heat
A well-functioning commercial air conditioning system can be a saving grace in the middle of summer. However, when you start encountering problems with your AC unit, you may be worried about having to make major repairs. When it comes to AC fans not working, the problem can range from very simple to complex and costly. You will need a professional HVAC technician to diagnose your system. For more information about why AC fans stop working or to have your commercial AC unit diagnosed and repaired by a HVAC expert, contact Cool Works Co.