22 Jul, 2021
Wondering what to do about a frozen evaporator coil? It can be a huge problem if your air conditioner stops working because of a frozen evaporator coil, especially if it’s in the middle of a hot summer day. With that in mind, we’ve created the guide covering everything you need to know about a partially frozen evaporator coil, ice on an evaporator coil, and more.
The evaporator coil refers to the part of your air conditioner system that absorbs the heat and takes it out of the air circulating around your home. It is typically either located inside of the air handler or attached to the furnace. The evaporator coil works with the condenser coil to finish the heat exchange process that leads to cool air.
The evaporator coil is filled with evaporated refrigerant or Freon, which the compressor pumps as a liquid to the metering device and then the evaporator. The air pushed from the blower fan through the evaporator coil moves over the evaporator coil where the refrigerant or Freon in the evaporator absorbs the heat from the air inside your home.
The evaporator coil should be cold yet not freezing in a properly functioning air conditioner system. When working correctly, the evaporator circulates the refrigerant or Freon vapor at a temperature of about 40 degrees. This is the best temperature to take heat from the air moving through the evaporator coil but not freezing enough to create ice within the coil.
What happens when your AC coils are frozen? If you do have any ice in the evaporator coil, this will lead to the creation of more ice, and eventually, the entire evaporator coil will become a huge block of ice. With an evaporator coil freezing, the blower fan will strain to pull air through the evaporator coil and will most likely overheat. Also, your compressor will probably become overstressed as your air conditioner continues to run constantly, working overtime to make up for the frozen coil in the AC unit.
Eventually, your entire air conditioner might shut down, or the circuit breaker might trip. As the block of evaporator coil ice melts at a rapid pace, you will probably run into even more issues with the frozen evaporator coil and defrost. For example, several gallons of water might come out of the air handler, which can either leak through the ceiling or soak and damage important structural parts of your home.
But how exactly do you troubleshoot problems with your evaporator coil, like an AC condenser that’s frozen? Here are the steps we recommend for fixing the frozen evaporator coil:
We recommend contacting a professional HVAC service to help you if the freezing continues to happen after you install a new filter or if you notice that the motor or blower drive belt is broken.
If you are experiencing frozen evaporator coil issues, please contact Valley Service. Feel free to reach out to us to learn more about our services and what to do when AC coils freeze up.