Someday, in the not too far off future, we may have air conditioners that self-diagnose malfunctions and report them back to the homeowner in detail. It’s really not too far-fetched of an idea when you think about it.
In the meantime, however, before this becomes a reality, we need to rely on other methods for our air conditioners to send warning signs that something is wrong. Maybe it’s a drop in cooling power, or an unexplained spike in your energy bills. Or, it could be that your circuit breakers for the indoor and outdoor units are constantly tripping.
One of the most common signs that something is wrong with an air conditioner is strange noises. What qualifies as a strange noise? Honestly, anything that’s different from the normal hum of the fans and the compressor, plus the occasional clicking as the system comes on and shuts down and the temperature fluctuations cause the ductwork to adjust.