Aerobic Septic Alarm Going Off? Here's What It Usually Means

If you live in Boerne, Bulverde, Canyon Lake, or anywhere else in the Hill Country with an aerobic system, sooner or later you'll hear it: a buzzer, or a red light on the control panel by the house. Here is what it usually means and what to do.

Common Causes

• High water level. The pump tank is filling faster than it empties, often because the pump, float switch, or timer has failed, or because the household used a lot of water at once.
• Air compressor or aerator failure. Without air, the bacteria that treat wastewater die off and odors follow. Many panels alarm when air pressure drops.
• Tripped breaker or power issue. A tripped breaker can stop the compressor or pump.
• Clogged filter. Compressor air filters can clog and reduce airflow.

What to Do Right Now

1. Silence the buzzer if your panel has a silence switch. The light usually stays on.
2. Cut water use. Hold off on laundry, dishwashing, and long showers.
3. Check the breaker for the system. If it trips again, stop and call a pro.
4. Listen to the compressor. Silence or grinding can point to failure.
5. Don't open the tanks. Septic gases are dangerous.

When to Call

If the alarm doesn't clear within a few hours of reduced water use, or you see sewage surfacing or backing up, call a provider. If you have a maintenance contract, call your provider first. Many contracts cover service calls.

FAQ

Can I ignore the alarm if nothing smells? No. The problem can get worse and lead to a backup.

Is the alarm covered by my maintenance contract? Often the service call is, but parts may not be. Check your contract.

Need Help?

Get a free quote and we'll connect you with a local aerobic septic professional.