If you wonder why your air conditioner doesn’t cool like it should, it may be due to a dirty and clogged system that is restricting airflow and cooling capabilities. Before you rush out and spend thousands of dollars buying a new system because you were told it was old and worn out, consider that your system may simply need a good cleaning.
Air conditioning systems are fairly simple. The typical residential central air conditioning system consists of an outdoor unit called a condensing unit. The unit contains a fan, compressor (1) and a condenser coil (2). The unit is connected to the indoor components via refrigerant lines. The indoor components are located in the furnace cabinet, which contains the blower (3) and evaporator coil (4). The basic operation of the system works like this: The outdoor unit kicks on when the home needs cooling. The compressor pumps refrigerant gas into the condenser coil. When the condensor coil is clean and the air moves through it freely, the outdoor fan will remove the heat from the gas and condense it to a liquid. This liquid refrigerant is then pumped through the refrigerant lines indoors to the evaporator coil. When the evaporator coil is clean and the air moves through it freely, the indoor fan will blow air through the coil which will evaporate the liquid refrigerant inside the tubing. The action of evaporating the liquid refrigerant will cause the coil to get very cold which will cool the air blowing through it and into your home through your air ducts.
With this basic understanding of the system, one can easily understand that if the evaporator coil, the blower, the condensor coil or the air ducts are dirty and clogged, air flow (5) will be restricted and your system will not cool the house the way it did when it was new.
Below is an example of an evaporator coil that has caked-on dirt inside its interior walls (a). Obviously, if the blower is attempting to force air through these clogged interior walls, the airflow will be restricted. This restricted air flow will severely limit the capacity of your system to cool your home. Additionally, when the evaporator coil becomes clogged, it often will freeze over like the picture below (b), A frozen coil can lead to component failure and expensive repairs. When a system is in this condition, it will not operate efficiently, drastically driving up energy costs.
The exterior condensing unit (c) is exposed to the elements. Over time, dust and debris build up on the outside and inside of the condensor coil. When this occurs, the condenser coils become choked-off from air flow (d) and lose their capacity to condense refrigerant gas into a liquid which is a critical for your system to properly cool your home.
It is important to note that only a properly trained HVAC technician should attempt to remove or clean any system components described above. Before you spend thousands of dollars replacing you’re A/C system call Monster Vac and speak to one of our customer service representatives. Your system might just need to be Monster Vac’d! We hope this article helps explain why your air conditioner doesn’t cool like it should. Mention this article for $50 Off a complete system cleaning. Ask a representative for more details. Call 303-277-0140