High Water Level
Most common cause
Aerator Failure
Aerobic systems only
Float Switch
Stuck or tripped
Power Issue
Outage or electrical fault
The Most Common Causes
- High water level in the tank, often from overuse or a clog downstream
- Aerator failure on aerobic systems
- A tripped float switch
- A power interruption or electrical issue at the control panel
What to Do When It Sounds
- Note whether the alarm is continuous or intermittent
- Reduce household water use immediately
- Check if there's an obvious cause, like a recent power outage
- Call for service rather than simply silencing the alarm
Why You Shouldn't Just Silence It
The alarm's silence button stops the noise but doesn't fix the underlying issue. Repeatedly silencing an alarm without addressing the cause risks a full backup or system failure.
When It's an Emergency
A continuously sounding alarm combined with any sign of backup or overflow should be treated as an emergency requiring prompt service.
Key Takeaways
- Alarms most often signal high water, aerator failure, a tripped float, or a power issue.
- Reduce water use immediately and call for service rather than just silencing the alarm.
- A continuous alarm plus any backup sign should be treated as an emergency.
Frequently Asked Questions
Can I fix an alarm issue myself?
Diagnosing the cause safely requires professional evaluation — please don't attempt electrical or tank-related repairs yourself.
Why did my alarm go off during a power outage?
The control panel and aerator run on electricity, so an outage can directly trigger an alarm.
Is it safe to keep using water while the alarm sounds?
It's best to minimize water use until the cause is identified and addressed.