Deciding to Seek Help For Your AC Unit

By the time you finally get into bed at night, you might not want nothing more than to watch a fun television show in your cool, air conditioned master bedroom. Unfortunately, if you are experiencing trouble with your air conditioner, you might find yourself in a stuffy, uncomfortable space instead. However, air conditioning trouble doesn't have to come as a surprise. If you can learn to recognize the signs of trouble early, you might be able to call in the professionals before things turn sour. On my blog, you will be able to read through loads of helpful information on HVAC, so that you can detect trouble before it ruins your sleep.

AC Coil Keeps Freezing? You Might Have A Coolant Or Air Filter Problem


When working properly, your evaporator coil should keep your home cool inside. But if the coil constantly freezes up, there could be a hidden problem with your coolant lines or air filter. If you follow the simple diagnostic steps below, you might be able to find the cause of your frozen evaporator coil.

Does Your Air Filter Appear Clean or Clogged?

A clean and properly fitting air filter can prevent a number of problems with your cooling system, including a frozen evaporator coil. However, a filter that clogs up easily or heavily can cause an evaporator coil to freeze. If debris escapes the filter, contaminants can coat the surface of the coil and keep it from operating as needed.

Here are five diagnostic steps you can follow to determine whether or not the air filter is the culprit behind your frozen coil.

  1. Shut off your cooling appliance.
  2. Remove the air filter from the indoor air handler.
  3. Inspect the filter thoroughly. If the filter looks unclean, change it.
  4. Replace the filter, then return electrical power to your cooling system.

Allow your air conditioning time to start up and cool down your home. Then check the evaporator coil to see if it contains frost or ice. If the device is clear, and your house still feels good, you successfully diagnosed and solved the problem. If frost or ice covers the coil, you'll need to try something else to fix the issue.

Does Your Coolant Lines Appear Sealed or Damaged?

Along with a blocked air filter, evaporator coils can ice up if the coolant suction line connected to them leak. A suction line carries refrigerant to and from the evaporator coil. If a kink, hole, or crack occurs in the line, coolant can filter out of it. 

There are a couple of ways to tell if you have a leaky suction line. The line might make a subtle hissing sound as air escapes it, or the line might appear frozen or covered with frost. If you detect any of these problems in the suction line, stop and call an HVAC contractor for further assistance.

A contractor may run a refrigerant test in the line to see if it contains rust, corrosion, or physical defects, such as holes, dents, and cracks. The test may also reveal mechanical issues with the suction line or the components connected to it. If any of the outlined problems above exist in the suction line, a contractor may repair them.

For more information about your evaporator coil and why it freezes up constantly, contact an air conditioning or HVAC contractor such as ASAP Heat & Repair today.


26 December 2019