Do-It-Yourself Furnace MaintenanceDo-It-Yourself Furnace Maintenance

About Me

Do-It-Yourself Furnace Maintenance

Your furnace needs the proper maintenance to keep it running efficiently and to help ensure it lasts as long as it is designed to. However, hiring a professional to clean, oil and maintain this appliance can get costly. My name is Jeff and like many of you, I live on a very tight budget. I spent a lot of time researching various type of maintenance that I could do on my furnace myself to get it the maintenance it needed at a price that I could live with. I created this website to share my knowledge and experiences with others who wish to save some money on their furnace maintenance needs. I hope this proves helpful to you.

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Evaporator Coil Issues That Can Affect Your AC's Functions

The evaporator coil is one of the critical components of the air conditioner (AC). The evaporator blows cool air over hot refrigerant to facilitate heat exchange and cool the air. Thus, problems with the coil can grind your AC's functions to a halt. Below are some issues that can prevent the coil from performing at capacity.

Clogged Coil

Too much dirt over the evaporator coil can cause multiple problems. Here are some of those problems.


Debris insulates the coil and interferes with heat exchange. Impaired heat exchange means the AC has to work extra hard to cool the house to set temperatures.

Poor Air Quality

Some debris, such as dead insects or bird droppings, is dangerous to human health. Such debris might contaminate the indoor air and cause your household health problems. 


Some debris trap moisture and moisture accelerates corrosion. Thus, debris accumulation can also lead to corrosion-related damage to the coil.

Frozen Coil

You also have a serious problem on your hands if there is ice all over your evaporator coil. Effects of a frozen coil include:

  • Evaporator coil damage
  • AC motor overheating 
  • Decreased energy efficiency 
  • Impaired cooling

All the above occur because the AC has to work extra hard to cool the air if ice covers the evaporator coil. Typical causes of frozen evaporator coils include:

  • Dirty air filters
  • Blocked condensate line
  • Thermostat malfunctions 
  • Damaged evaporator fan
  • Refrigerant leaks

Anything that restricts the volume of air flowing over the coil can cause it to freeze. The freezing occurs because the evaporator coil holds the chilled refrigerant. Adequate airflow is necessary to keep the coil warm and prevent it from freezing.

Physical Damage

Physical damage to the evaporator coil comes in these two main ways.

Bent Fins

The AC evaporator has numerous fins to facilitate heat exchange. The fins help by increasing the surface area of the evaporator. A large surface area accelerates heat exchange so your house can cool down fast. 

Bent fins reduce the surface area available for heat exchange. With bent fins, your AC will be running but not cooling the house. Inefficient cooling can lead to AC overwork and its associated problems, such as overheating and frequent breakdowns.

Holes and Cracks 

Physical damage on the evaporator coil can also occur in the form of holes or cracks on the coil. The holes or cracks can lead to refrigerant leaks. According to, low refrigerant pressure can lead to problems such as inefficient cooling, frozen evaporator coil, and energy inefficiency, among other problems. 

Reach out to an air conditioning repair service to learn more or get help repairing your AC.