The answer to 'sump pump making gurgling noise' is that a gurgling sound coming from your sump pump is typically a sign of a blockage or issue with the pump's operation. This can be caused by a clogged inlet screen, a problem with the check valve, or a buildup of debris in the sump pit.
Gurgling noises can indicate that water is not draining properly from the sump pit, which can lead to flooding if left unaddressed. In some cases, the gurgling may be accompanied by the pump cycling on and off more frequently than normal.