Air Conditioner in Katy, TX – All About Evaporator Coils

Air Conditioner in Katy, TX – All About Evaporator Coils

One of the most frequent problems that may arise with your much-needed HVAC unit during the summer is a frozen evaporator coil. There is a multitude of issues that can arise that will make your evaporator air conditioning coil freeze over.  The following list details things you can check with your heating and cooling unit before you contact a qualified technician in the Katy Fort Worth Texas area to assist you.

If your evaporator coil has frozen over you should turn off your HVAC unit. Continuing operation of the system can and will damage the compressor. If you are in need of help with your HVAC system, give Cypress Heating and Air a call now.


Reasons an AC Evaporator Coil can Freeze Over


  • If there is a restriction of air flow around the evaporator coil then the temperature of the coil will eventually drop below thirty two (32) degrees Fahrenheit. When this happens the humidity and condensation around the coils will begin to freeze over. If you need repair for your air conditioner in Katy, TX give Cypress Heating and Air a call today.


  • You need to frequently check your air filter to ensure that it stays clean. If you have not then you should change the air filter.  If it turns out that all that is wrong is an old air filter then upon replacing it with a new one shut off your air conditioning unit at the thermostat and turn on the fan. The fan will help thaw the AC’s evaporator coil.


  • Inspect the evaporator coil from the side of the intake and check to see if it is clean. In the event that the intake side is corroded and/or clogged then you will need to clean it.  It is best to contact a qualified technician to assist you with this as the fins can easily be bent which will restrict air flow and cause further problems. If you decide to clean it yourself then you will need the proper cleaning materials and brushes.  Always use a soft bristled plastic brush and never a wire brush. When cleaning the coil with the plastic brush make sure that you brush parallel to the fins to ensure that you do not damage them.


  • Inspect your homes intake grilles to ensure that there is no blockage. If the intake grilles are blocked then remove the blockage. Once removed thaw the evaporator coils before cutting the system back on.


  • In some instances there may be too many supply registers that have been closed or blocked by furniture or the like in the home; when this happens – by forcing the air into one part of the house this can cause the evaporator coils to freeze over. The general rule of thumb for most homes is to have 80 – 100 CFM air flow. Each tonnage of your unit will require between 350 – 400 CFM to ensure proper air flow. For example if you have 10 vents in your home you should have around 7 to 8 vents unrestricted.


  • Have a look at the blower motor of your unit. If your inspection finds that it is not running; this will definitely cause the evaporator coil to freeze over.


  • If the temperature in the home has reached the thermostats setting then the outdoor unit should shut off. Inspect that the outdoor unit has shut off.  If it is continually running then there is most likely a stuck or welded contactor.  This in turn will restrict air flow as the indoor units blower motor will not be operating and cause the coils to freeze over.


  • Lastly, there may either be a leak or low refrigerant charge in the system. In this case this too will cause the AC units evaporator coil to freeze over. Contact a qualified air conditioner in Katy, TX technician to conduct a refrigerant leak test. If you have an older air conditioner in Katy, TX system then there is a good chance it could be low on refrigerant. In some cases adding refrigerant to the system can correct the problem as well as decrease your energy usage. Other times you may need to have the evaporator coils or the outdoor unit replaced.

Frequent maintenance and inspection of your home’s AC unit will increase the life cycle of your system as well as decrease your homes energy consumption.  If you would like to have your unit inspected and maintained you can give Cypress Heating and Air a call today. We will be more than happy to assist you with your needs and promptly send one of our qualified HVAC technicians to your Katy – Fort Worth home.

About Cypress Heating and Air

Cypress Heating and Air Conditioning has been helping homeowners and businesses alike in Katy, Texas and surrounding areas for many years with air conditioner in Katy, TX. We are one of the leading heating and air companies in the area.  Dedication, determination and professional services that you can rely on have helped made us the go to source for customers in the area who are in need of heating and cooling repairs, installations and maintenance. When you contact Cypress Heating and Air Conditioning in Katy, Texas you can rest assured knowing that you are receiving high quality professional air conditioner in Katy, TX that is both reliable and affordable.


Cypress Heating and Air Conditioning in Katy, Texas is a leader in the HVAC field servicing Katy, Plano, and surrounding areas. Our NATE certified technicians provide professional HVAC related services, installation and repairs. If you are looking for help with your home or business’ HVAC system and need air conditioner in Katy, TX do not hesitate to give us a call today. One of our professional technicians will be more than happy to assist you and schedule a service call air conditioner in Katy, TX at your earliest convenience.  Cypress Heating and Air Conditioning is a proud member of the BBB and maintains a rock solid A+ rating.