A few months ago, I would be clueless about anything Heating & Air Conditioning. However, due to the challenges that I experienced when my A/C suddenly broke down, I needed all the cool air I could get, which prompted myself and others to learn as much as possible. This sent myself and others researching every potential issue that may cause an A/C to stop working suddenly. The discoveries I made were mesmerizing. One of the major challenges that force shut ACs is the lack of a filter change. Filters sieve out the dirt and debris that potentially clog the machine and cause airflow restriction through the vents. When left unattended, the dirt accumulates and may even corrode the internal components of the Heating & Air Conditioning system. This happens when the a/c machine is forced to labor several times harder, but as such slowly causes wear and tear of the internal components. Therefore, it is essential to recognize when to change the A/C filters in nice time lest you risk dealing with these concerns. Fortunately, some signs will always manifest and push you to change filters instantly they start showing. First, you need to monitor the temperatures. If the air is not cool enough as expected, then something is off. You need to stay alert further and see if the electricity bill increases. If it has, then this is your cue to try and figure out what could be happening. Besides that, also check to see if you are suddenly suffering from continuous dust sensitivities. If you are not sensitive yet cannot avoid getting a cold, then the filter may be problematic.