When replacing your air conditioning system, Energy Services will inspect all components to ensure that your new system has properly matched components. It is especially important to replace the indoor evaporator coil along with the outdoor condensing coil. When an old outdoor condensing unit fails, air conditioners and compressor manufacturers say that over 63% of the failures are caused by a restriction or refrigerant leak in the indoor evaporator coil.
Manufacturers report keeping an old evaporator coil is a very large gamble. Here’s why:
Pictured here is a furnace and a plenum. The sheet metal plenum is situated on top of the furnace. Inside the plenum is the air conditioner indoor evaporator coil. Note: The door to plenum closed at the top of the furnace.
When shopping for a new a/c, many contractors will only quote you to install an outside condensing unit, not the indoor coil as well. Doing this is terrible business practices and very misleading. Try to avoid these contactors.
In this pic, the door to the plenum is open exposing the pre-existing evaporator coil.
In this situation, the previous contractor who installed the outside a/c and this indoor evaporator coil did a poor installation job. The contractor installed this coil too close to the furnace. This caused the furnace to short-cycle and the heat exchanger to crack, resulting in the homeowner getting sick from CO poison.
New furnace and indoor evaporator coil. (Note the evaporator coil is raised above the top of the furnace)
1. Saves money by reducing service calls and down-time.
2. Helps to improve air flow and comfort.
3. A new evaporator coil will save you money by making the air conditioning system more efficient (Old coils are dirty which results in a loss of efficiency). This will save you hundreds of dollars every year.
4. It is smart to replace the indoor coil when replacing the outside condensing unit.
Remember, there are a lot of HVAC contractors that will do ANYTHING to get your business. This means they might tell you that your old evaporator coil does not need to be replaced.