Some problems with a central AC unit are easy to recognize: a banging, misaligned fan, cooling coils which suddenly quit working, or a compressor unexpectedly making loud noises. One problem which can happen behind the scenes but be equally damaging is a low refrigerant level. AC units shouldn’t ever need refrigerant added, so at the very least, low refrigerant levels indicate a leak of some sort in addition to the possibility of secondary problems. We’ll discuss below how this issue can affect an air conditioning system.
