It's important that your air conditioner stays in the best working order possible in order to ensure that you stay nice and cool during the hot summer months. There are a number of signs that something is wrong with your air conditioner unit, and you should be aware of them so you can have your unit repaired or replaced as soon as possible.
No Cold Air
First off, a telltale sign that your air-conditioning unit has reached its last rope is no cold air. If your unit has no cold air coming out of it or isn't producing as much cold air as it once did, your system could simply be low on Freon or the air filter might be dirty and clogged blocking the cold air from coming out. Another cause of lack of cold air could be dirty coils. However, this could also be an indicator of a system failure.
If your air conditioner is making strange noises this is an important sign something is wrong. Something may have come loose, or even worse something may have broken entirely. If you notice that your AC unit is making a lot of noise where it was quiet before, have a professional come check out your unit.
Lack of Air Flow
A lack of airflow can be a signal of multiple issues within your unit. Sometimes it's simply the collection of debris over time that is blocking the air from moving throughout the ducts and that can be cleaned easily, but there is always a risk that the unit's compressor may have failed. No airflow at all might also be indicative of a malfunctioning blower unit. Often times it is better to just replace your air conditioner altogether if these problems keep occurring.
A drastic or gradual change in odor may be a sign of multiple issues. First off this may be a sign of mold in the unit, which can be extremely dangerous if left unchecked. You can try to clean mold from the unit with a mixture of bleach and water. However, if mold cannot be completely cleaned from the unit, it will need to be replaced.Another issue may occur if the wire insulation inside your unit may have burned out completely leading to a musty smell. If the wire insulation in your unit has burned out, you will need to replace your air conditioning unit as this poses a huge fire hazard.