James: Thank you for contacting Porch. This sounds like you have a lift station, and the high liquid alarm is sounding. This indicates a problem with the pump(s) or switch or another component. Best action is to contact a plumber or septic contractor immediately for repairs as these systems can be complicated and complete failure can result in backup of sewer. You can locate a local pro here: https://pro.porch.com/near-me/septic-tank-contractors or call us at 1-855-707-0141 to get started.