5 Most Common HVAC Coil Problems & Ways To Clean


The coils inside of a building’s air conditioning or HVAC system are a breeding ground for dirt, grime, and microbial growth. This biological fouling is one of the root causes for reduced equipment life, inefficient heat transfer, and poor indoor air quality. Yet in order to combat this universal problem, one has to be able to fully access the depth at which the harmful build-up is occurring and be able to remove it, all while causing zero damage or corrosion. It is now possible to clean and disinfect nearly 100% of an HVAC coil’s surface area, making it easy for any property to keep its HVAC system running fresh and like new again.

Most common health dangers of dirty HVAC coils:
  1. Plugged Coil System
  2. Coil Corrosion 
  3. Foul Odors
  4. Microbial Growth 
  5. Fungal or Mold Growth
When evaporator coils and condenser coils get dirty, there can be problems such as:
  1. Reduced heat transfer
  2. Decreased cooling capacity
  3. Increased energy consumption
  4. Increased operating pressures and temperatures
  5. Increased wear on the system which often leads to early damage, malfunctions and reduced life capacity.  
Ways to clean HVAC evaporator coils.
  1. Compressed Air
  2. Using a brush
  3. Spray coils with HVAC cleaning foam 
  4. Mild detergent and warm water
  5. Pressure washing
When it’s time for the annual preventive maintenance on your air conditioner, don’t forget to pay particular attention to system components that are out of sight within the system cabinet or air handler enclosure. The unit’s evaporator coils are among the more important of these hidden components. When problems develop with dirty evaporator coils, your A/C’s efficiency can drop, it’s performance will decrease, and damage or breakdowns can occur. Here is some basic information on air conditioner function and the importance of evaporator coils, along with some instructions on how to clean A/C evaporator coils.

Evaporator coils capture heat from the air inside your home, while condenser coils release that captured heat into the air around the A/C’s outside unit. These coils are usually made of copper and are surrounded by a series of aluminum fins that improve heat transfer. Evaporator coils are found inside the indoor air handling unit, while condenser coils are contained in the outdoor cabinet.

Evaporator coils are very important to the cooling performance of your air conditioning system. They provide the cooling that is required to produce the cold air that keeps your home or business comfortable even when temperatures are at their hottest.

Coils are also involved in the dehumidification your air conditioner provides. As these coils become cooler, water condenses on them and is removed from the air inside your home. This water is collected in a drain pan, where it flows away safely.

Contact a professional to do your cleaning on commercial HVAC systems. 

Popular Articles