Understanding HVAC Systems

Welcome to my blog! My name is Darren. My friends say that I am boring because I love the HVAC system in my home. I am not an HVAC professional, I just love the gentle hum of my air conditioning system as it gently brings the air in my home to the perfect temperature. When I was a kid, my family couldn't afford air conditioning so I spent many summers sweating away and feeling miserable. I vowed to myself then that when I grew up, I would have the best HVAC system money could buy. I hope you find my HVAC blog useful.

Your Air Conditioner Won't Blow Cold Air? Find Out the Reason and How to Fix


Air conditioners are useful appliances to have in your home. They are usually designed to cool your home and make it more comfortable to live in especially in the warmer months. However, like any other appliances, air conditioners develop problems sometimes. For instance, your air conditioner may fail to blow the cold air that it's designed to. This won't only be frustrating but also costly because you will be using energy to run a faulty appliance. Fortunately, troubleshooting an air conditioner that won't blow cold air is simple if you know what or where to look. Here are some of the top causes of this air conditioner problem and how you can fix it.

Dirty Air Filters

Adequate airflow is crucial to the functioning of your air conditioner. Air is usually drawn over your evaporator coils, cooled, and then channelled back into your home as cool and conditioned air. Therefore, if your air filters are dirty, airflow will be restricted, which means little or even no air will blow over your evaporator coils. This simply means the cooling capacity of your air conditioner will be affected and it won't blow the cold air you need. You can try cleaning the air filters using a soft brush and soapy water. However, if the filters are extremely clogged with debris, consider replacing them and making it a habit to clean the new filters regularly to prevent the problem from recurring.

Low Refrigerant Levels

The refrigerant helps your air conditioner to cool your home by absorbing heat from the unit's heating chamber. With no or less heat removed from the air because of empty or low refrigerant, the air being blown from your air conditioner will be unconditioned or inadequately conditioned. Refrigerants usually last a lifetime so if you are running low, it is usually because of a leak somewhere in the unit. Have a professional locate the leak and fix it. Some of the signs of low refrigerant levels include long cooling cycles, icing, and unusual sounds such as bubbling, gurgling, and hissing noises when the air conditioner is operating.

Defective Thermostat/Temperature Control

This device will monitor the temperature of the air coming inside your home in order to turn the air conditioner's compressor on or off. Most temperature control devices have a sensing bulb designed to monitor the temperature of the air inside the room being conditioned and then turn the compressor on or off to condition the air to the desired levels. Defective thermostats and controls won't power your compressor that's why your air conditioner won't blow cold air. Try replacing the control or the sensing bulb itself especially if it has visible signs of damage.


15 May 2017