The answer to 'why is my sump pump overflowing' is that there are several common causes, including a failed or malfunctioning sump pump, a blocked or clogged sump pit, a power outage, or a problem with the discharge line. Symptoms can include water pooling around the sump pit, the pump running constantly, or the pump failing to turn on at all.
Some potential solutions include checking the sump pump for any debris or blockages, ensuring the discharge line is not clogged or frozen, and testing the pump to make sure it is working properly. If the sump pump is old or not functioning correctly, it may need to be replaced. In some cases, the issue may be with the electrical system or the sump pit itself, which would require a professional plumber to diagnose and repair.