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Thursday, 17 August 2017 19:32

What Causes Frozen A/C Evaporator Coils?

On a central air conditioner, the evaporator coils are located inside of the home. When the air handler blows warm air over the coils, the refrigerant inside the coils absorbs the the heat, lowering the temperature of the air that is blown through the home's air ducts. In addition to cooling your home, an air conditioner also dehumidifies the air. During the process of dehumidification condensation builds up on and drips off of the evaporator coils. This condensation is normally collected in a pan and drained away. When the condensation on the evaporator coils freezes, it can prevent your home from cooling properly and could lead to system breakdowns. So what causes the evaporator coils to freeze? Here are few possible causes:

1. Airflow Problems. When there is not enough return air blowing over the evaporator coils, the coils won’t have enough heat to absorb and can start to freeze. Airflow can be limited by a clogged air filter, leaking air duct leaks, blocked air registers and other causes.

2. Dirty evaporator coils. A dirty, unmaintained air conditioner will gradually result in reduced efficiency and uneven cooling. As the coils become covered in dirt they can't absorb the heat from the air and the result is frozen coils.

3. Low Refrigerant Levels. When refrigerant levels are too low as a result of a leak, the coils will not be able to absorb heat from the air, which can cause them to freeze up.

Have frozen evaporator coils? First turn the air conditioner off to allow the coil to thaw and prevent damage to the system. Next, call ABC Southwest Plumbing and Air Conditioning. We can diagnose the cause and get your air conditioner up and running again quickly.
Thursday, 19 January 2017 17:33

The ABC's of Air Conditioning - Refrigerants

Your home's air conditioner or heat pump uses one of two kinds of refrigerants: R-22 (also known as Freon) or HCFC-22. If your air conditioner was manufactured in 2010 or later, it uses HCFC-22.

R-22, or Freon, is being phased out and replaced with more environmentally friendly refrigerants. The most common replacement for R-22 in central air conditioners is R410A, also known as Puron. If your central air conditioner is still using R-22, it will not be compatible with R410A.

When you upgrade to a R-410A central cooling system, a new line set and new evaporator coil will be installed to replace the older R-22 equipment. R-410A cooling systems have proven to be dependable, efficient and quieter.

Have questions about your central air conditioner? Call ABC Southwest Plumbing and Air Conditioning, we can help.
Learning Thermostats, or smart thermostats, have been around for a while now, and they keep getting smarter. Here are some of the features you will find that can help keep your home more comfortable while also reducing your energy usage.
  1. Learns your routine. Built-in sensors track activity in the home and use algorithms a custom, auto-adjusting temperature schedule based on those movements in the home. If you turn down the heat before bed, the thermostat learns this routine.
  2. It knows when you're away. Using your smartphone's location and sensors in the home, a learning thermostat can switch to economy mode to save energy.
  3. Tracks energy usage. Knowing your energy usage history can help you better manage your heating and cooling schedule and save on your utility bill.
  4. Early warning of an emergency. If the temperature drops unexpectedly when it's below freezing because your furnace is not working, you will be warned before pipes freeze and your home is damaged.
Upgrading to a learning thermostat is easy, and can make your home more comfortable and energy efficient.


If your home's cooling system is getting on in years and it may be time to replace it with a new, more reliable system, here are a few things to consider when it comes to new systems.

1. Reliabilty - An air conditioner is a major investment. Do your research and go with a proven brand and you'll reduce the chances of having problems down the road.

2. Efficiency - By choosing an EnergyStar rated system you'll save you up to 30% on your annual cooling bill.

3. Professional Installation - The most important day in the life of your air conditioner is the day it's installed. Proper sizing and correct installation is critical. Choose a heating and cooling company with experience and one that stands behind their work, now and down the road.

4. Air Quality - To reduce indoor pollution consider attaching a whole house air cleaner to your furnace or air handler. You can have peace of mind knowing your new system is capturing small contaminants that can cause health problems.

Have questions about choosing a new air conditioner? Call ABC Southwest Plumbing and Air Conditioning. We're here to help.

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  • "ABC Plumbing& A/C is a company I would keep for all time. Had an emergency at night, and they came right away, very little wait time. 2 days later, Henry and Trenton did a very big job and explained in detail what they had to do. Very polite, knowledgeable, and they even cleaned up!!! Which they didn't have to do. Thank you for all your hard work!!" Read More
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