The refrigerant becomes warmer and travels to the condenser coil outdoors. With a heat pump, the process reverses in the winter and the evaporator coil expels heat from the refrigerant into your home, instead of absorbing it and taking it outdoors.
Most heat pumps have auxiliary heating elements that are part of the evaporator coil components to supply heat when temperatures fall below a certain point. Find a Lennox Dealer Near You. Evaporator Coil. It entails opening up the unit and pulling the coil.
Refrigerant lines will need to be disconnected, and the system will need to be repressurized. Unless you have the knowledge and special tools, these are not DIY repairs. Additionally, many states and even municipalities require licensing for anyone working with refrigerant. That means hiring a professional.
Replacing your evaporator coil isn't cheap. A common problem you'll have during the cooling season is a frozen evaporator coil.
If you notice your evaporator coil is frozen you need to immediately shut down your system. Failure to do so can damage the compressor. The evaporator coil's job is to absorb the heat from the air within your house. During normal operation, condensation collects on the coils and evaporates. However, if something isn't working correctly during the cooling process the condensation could freeze.
There are several reasons why your AC evaporator coil is frozen. Let's take a look at the most common:. Inadequate Airflow - This is probably the most common cause and could be the result from a broken air handler or even as simple as closed registers inside the house.
Without adequate airflow blowing over the evaporator coil, the condensation on the coil will freeze because there isn't enough heat to be absorbed. Clogged Air Filter - Air filters are designed to filter out the dust and debris from the air as it passes through your system. However, if your air filter is dirty it'll restrict the airflow which can cause the coil to freeze. Evaporator Coil Needs Cleaning - If your evaporator coil is dirty it'll make absorbing the heat difficult.
The dirt build-up will basically act as insulation keeping the heat away from the coils, which will cause the coils to freeze over because they simply get too cold. Low Refrigerant - When your system is running low on refrigerant it won't perform as it should. A frozen evaporator coil is a common symptom of this problem. Improper System Size - An oversized system can deliver too much cooling power for the size of the home; this is extremely common. Because the unit needs a certain amount of airflow, a home that is too small for the AC system can't provide the airflow necessary for it to operate properly.
If this is your problem, you'll need to replace the evaporator coil and the outdoor unit. All of the above possiblilities can result in an AC system that doesn't perform as designed, and in addition, will shorten the service life of your unit.
Regular maintenance and ongoing observation are the keys to proper performance and maximum service life. In theory, there is no reason why your evaporator coil won't last as long as your HVAC system. But this, of course, assumes that you are providing proper care. If you neglect your evaporator coil, you'll most definitely need to replace it at some point.
To get the maximum service life from your evaporator coil you should change the filter monthly during the cooling season. This is by far the least inexpensive and easiest way to extend the service life. Also, we highly recommend having an annual service conducted by an HVAC professional. The visit will include an inspection of all the major parts, including the evaporator coil and confirmation of proper refrigerant level and pressure.
When your filter becomes too clogged, the dirt and dust will begin to settle on the evaporator coils instead of the air filter. You should also schedule HVAC maintenance once or twice a year so that your evaporator coil can be properly cleaned and inspected. One of our experienced technicians will service your system so it can continue to run as efficiently as possible. Apr 26, What is an Evaporator Coil? How Does it Work?
Why is a Clean Evaporator Coil Important? Search for:.
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