Low thermostat temperatures cause frozen evaporator coils

I thought we were doomed to replace the equipment, but the HVAC repair technician told us that our refrigerant levels were low.

One of the most common problems that can occur with your heating and cooling system happens when the evaporator coils become frozen. The evaporator coils are responsible for absorbing the heat in your home. When there is a problem with cooling, condensation can freeze on the evaporator coils. There are a few reasons why the evaporator coils might freeze. The first and most common reason is due to a lack of airflow. If there isn’t air blowing against the coils, then they cannot absorb the heat. A dirty air filter can also restrict airflow and cause evaporator coils to freeze. Low refrigerant is another reason why your system might have frozen evaporator coils. This is the problem that occurred in my home last weekend. My wife and I were throwing a summer party and the air conditioner stopped making cold air. We had to end the party early and call a repair company to fix the problem. They came the same day to investigate the issue and fix our problem. I thought we were doomed to replace the equipment, but the HVAC repair technician told us that our refrigerant levels were low. He didn’t find any leaks, but he added a significant amount of refrigerant to the system. After a few hours, the ice on the coils melted and the air started to blow colder. Even though our summer party was a complete disaster, we were glad that we didn’t have to replace the whole machine. Instead of spending a few hundred dollars, we would have spent several thousands of dollars.

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