A septic alarm means the system detected either a high water level in the pump tank or a problem with the aerobic system's air pump. First, silence the alarm using the button on the control panel. Do NOT unplug it. Stop using water in the house. Check for a tripped breaker. If everything looks normal but the alarm is still active, call a licensed septic service. In most cases it is a failed pump or aerator, not a full system failure, and can be fixed same day.
First, silence — do not disable
Every septic control panel has a red silence button. Press it. The horn will stop but the light will stay on, which is exactly what you want. Do not unplug the control panel or flip its breaker. If you disable it entirely, you lose the diagnostic and any circuits that are still working.
Stop using water
If the alarm is a high-water alarm, the tank is full and cannot pump out. Every gallon you send down the drain from here on has nowhere to go and is climbing towards a house backup. Skip the shower, hold off the laundry, and use as little water as possible until you know what is going on.
Check the obvious
Walk to the control panel and check that it is powered. Then go to your breaker panel and look for a tripped breaker labeled for the septic pump, aerator, or control panel. Reset any tripped breaker once. If it trips again immediately, stop — that means something is shorted and it needs a pro.
If the aerobic air pump (the small blower box near the tanks) is silent or vibrating strangely, that is likely the cause. A dead aerator is a same-day replacement.
Common causes in order of likelihood
1. Aerator or air pump failure on an aerobic system.
2. Effluent or pump tank pump failure.
3. Float switch stuck or failed.
4. Control panel fault after a power surge or lightning.
5. Actual system failure (drain field or spray field saturated). Rare as the first cause, but does happen after heavy rain, and needs a bigger conversation.
When should I treat it as an emergency?
Sewage backing up into the house, standing effluent in the yard, or a strong sewer smell inside the home all mean stop-everything-and-call-now. A silent alarm with no other symptoms can usually wait until morning, but not longer. Ignoring an aerobic alarm for a week can kill the biology in the tank and turn a small repair into a much bigger job.
Local Hunt County specifics
After big rain events across Greenville, Caddo Mills, and the Lake Tawakoni area we see a spike in high water alarms. Groundwater floods pump tanks whose lid seals have failed. If you had a lot of rain in the last 48 hours and your alarm just went off, this is very likely the cause and it is fixable.
We answer the phone 7 days a week for exactly this reason. If your alarm is going off right now, call us and we can walk you through triage on the phone.