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Septic Alarm Going Off? What to Do Next

Man working on a septic inspection

Septic Alarm Going Off? What to Do Next

02/18/2026

If your septic alarm is going off don’t ignore it, but don’t panic either. A septic alarm is designed to warn you early that something isn’t working properly, often related to your pump system. Quick action can prevent backups, damage, and costly repairs.

Here’s what your septic alarm may mean, and what to do next.

What Does a Septic Alarm Mean?

Most septic alarms are connected to a pump chamber (common in homes with pressure systems or mound systems). The alarm typically means:

  • Water level in the pump tank is too high
  • The pump isn’t turning on or isn’t pumping fast enough
  • There may be an electrical issue, pump failure, or clogged line

What to Do Immediately

1. Limit Water Use Right Away

This is the most important step. Reduce stress on the system by avoiding:

  • Laundry
  • Dishwashers
  • Long showers
  • Multiple toilet flushes

Even temporary water reduction can help prevent overflow.

2. Check the Alarm Panel

Many systems have a control box with:

  • A reset button
  • Alarm silence button
  • Breaker/fuse indicator

You can silence the alarm, but don’t reset repeatedly. If the issue is mechanical, it could worsen the problem.

3. Check Your Breaker

Sometimes a septic alarm goes off because the pump breaker has tripped. If it has:

  • Reset it once
  • If it trips again, stop and call a professional

Repeated resetting can damage the pump or signal a larger electrical issue.

4. Look for Signs of Overflow

Check for:

  • Wet ground near the tank or drain field
  • Sewage smells
  • Backups inside the home

If any of these are present, stop using water immediately and call for service.

Common Causes of a Septic Alarm Going Off:

  • Pump failure
  • Float switch malfunction
  • Clogged filter or line
  • Power outage or electrical issue
  • Too much water use too quickly
  • Drain field issues causing slow discharge

Even something as simple as a stuck float can trigger the alarm, but it’s important to diagnose correctly.

When to Call LaVergne Plumbing & Heating:

  • Alarm continues after reducing water use
  • Breaker keeps tripping
  • You notice sewage odors, pooling water, or backups
  • Your pump is running constantly
  • You’re unsure what system you have

A pump alarm is an early warning system. Addressing it quickly can prevent a full septic emergency.

LaVergne Plumbing & Heating services Bellingham, Mount Vernon & Anacortes

If your septic alarm is sounding, professional help can protect your home and prevent system damage. A LaVergne technician can inspect the pump, floats, electrical connections, and tank levels to determine the cause. Contact a licensed septic professional today to diagnose your alarm and prevent bigger issues.