A clean air filter is essential for allowing air to circulate freely throughout the system. When the filter becomes clogged with dirt, it prevents cold air from flowing through the evaporator (cooling coil). This can be easily identified by feeling hot air coming out of the back of the unit. A dirty air filter will not only restrict the flow of cold air, but it can also cause it to build up inside the air conditioner unit and lower the temperature.
This can lead to ice forming on the air conditioner coils or evaporator, which will reduce the HVAC system's ability to remove heat from the air and eventually cause the air conditioner to break down. If your electricity bill is higher than usual (other summers), a clogged air filter could be the cause. A dirty filter creates a layer of dirt, dust and dander that restricts the amount of air that the air conditioner absorbs and puts pressure on the fan. Replacing a wet filter in the air conditioner is just a matter of icing and other problems, and trying to dry the filter with a cloth is likely to damage its delicate surface.
If your air conditioning system produces warm air instead of cooling the cold air, the main problem could be a dirty filter. Cleaning or changing your air filter is one of the most important steps you can take to maintain your air conditioner, as it avoids all of these potential problems, improves energy efficiency and helps avoid spending money on air conditioning repairs.
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