Saddleback Plumbing Heating & Air Blog: Posts Tagged ‘Evaporator Coils’

AC Question: What Causes Evaporator Coils to Freeze?

Monday, July 9th, 2012

When warm temperatures arrive it is important that your Orange County cooling system is performing at peak levels. Not only do you want your home to be cool and comfortable, but you want your system to be working efficiently. One of the most common problems with cooling systems is the freezing of AC or evaporator coils. There are many factors that can lead to this problem, and eliminating these factors will ensure that your air conditioning system is up to the task of keeping you comfortable during the hottest times of the year.

First things first, it is important that your AC system be turned off if you develop a frozen evaporator coil. Prolonged operation in conjunction with a frozen coil can cause serious, unnecessary damage to you system’s compressor. Don’t let a relatively small problem become a bigger one.

Restricted air flow across the evaporator coil is a very likely cause of its freezing. If the temperature is allowed to drop below freezing, the humidity and condensation that it is evaporating will freeze up. Maintaining proper air flow is a priority. Your air filters should be replaced if dirty and the evaporator coil’s intake must be free of blockages. Also check to make sure that multiple service registers in your home are not closed or blocked off. If cooled air has no outlet it can freeze up your evaporator coil.

Check your blower motor. If it is not running your evaporator coil is very likely to freeze up. Insufficient refrigerant in your system can also be responsible. If your systems refrigerant is low, call in an HVAC technician to recharge your system and to check for any potential refrigerant leaks. If you’re running your air conditioning system when the temperature outside is low, there will not be sufficient pressure to push the refrigerant through the evaporator and the coil will freeze.

The only way to sure of what is causing your evaporator coil to freeze is by having an Orange County AC specialist investigate the problem. Don’t get stuck in the heat when warm weather arrives. Call Saddleback and get your home’s cooling system back on track.

 

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