Grinder pump alarm keeps going off
Short answer
Each time: stop water, silence the horn, note the date, time, weather and what was running. Then book service even if the alarm clears; E-One says frequent alarms warrant a service call. Repeat alarms most often trace to rain or ground water, a leaking fixture, a check valve, greasy level sensors or a partly clogged grinder.
When a grinder pump alarm keeps going off, the pump is usually still working; something is repeatedly putting it behind. E-One's guidance is blunt: if the alarm sounds frequently, call for service, and if an alarm cleared itself, consider what caused it. The pattern of the alarms is the clue a technician needs, so this page is as much about what to write down as what to do.
If this is your first alarm, start with the alarm going off page. If the light is on with no sound, see the red light page.
Safe steps, in order
Nothing here opens the panel or the basin. If a step does not clear it, stop and make the call.
Step 1: Write down the pattern
Date and time, whether it had rained, which fixtures were in use, how long the light stayed on, and whether it cleared on its own. Alarms that follow rain, laundry day, or a full house each tell a different story.
Step 2: Stop water and silence the horn, every time
The same two moves as any alarm: no fixtures draining, and the silence button or toggle pressed once. The light will stay lit until the level drops; that is normal.
Step 3: Walk the house for running water
A toilet that runs, a dripping tub spout or a softener regenerating all feed the basin constantly. Keen lists leaking fixtures as a cause of frequent cycling. Listen at each toilet and look at each faucet; that is as far as a homeowner needs to go.
Step 4: Call the utility if it asks, then book service
Report recurring alarms to whoever services your pump. On a BCSS Keen station, a flashing red high-level alarm needs a prompt call to BCSS. Report any red alarm to Gulf Shores Utilities.
Why a repeat alarm is a different problem
A single alarm is often a one-off: an outage, a burst of water, a wipe that eventually cleared. A repeating alarm means a condition that is still there. The storage in the basin resets each time the pump catches up, so the system looks fine between events, but every cycle is the pump working at its limit, and the condition behind it tends to get worse, not better.
The second difference is damage. Myers warns that an overload which trips again after a reset means the pump is damaged. Keen says a red seal-leak light means the lower seal has already failed and the pump must be serviced before the upper seal goes. Both of those start as alarms that keep coming back.
Possible causes
Listed in the order the manufacturer tables and local utility documents point to them for recurring alarms.
- Rain or ground water getting into the basin. E-One's owners guide ties an alarm during rain to rainwater entering and overloading the system. Keen: ground water in the basin causes frequent cycling. Common here with our water table and summer storms.
- Leaking fixtures. Keen names them directly; Liberty lists leaking fixtures under a pump that cycles or runs when nothing is in use.
- A check valve stuck or installed backwards. Keen lists it first for frequent cycling. Liberty lists a leaking check valve. When the valve leaks, pumped sewage drains back into the basin and the pump re-runs it.
- Grease on level sensors or floats. The BCSS user guide says the station stops when sensors build up enough grease to obstruct movement. Keen: grease and solids accumulate when the off switch is set too high or debris collects around the lower float weight.
- A partly clogged grinder. Myers pairs an overload trip with a high-water alarm for a clogged grinder or failing motor. Each cycle takes longer, so each heavy-use period tips into alarm.
- Floats that have moved. Keen lists floats moved among the cycling causes.
- Too much inflow for the pump. Barnes lists excessive inflow and a pump that is the wrong size for the job. Added bathrooms, a spa or a rental at full occupancy can push a simplex station past what it was sized for.
After heavy rain
If the alarm only shows up during or after rain, the basin is probably taking on water it was never meant to receive: through a lid that no longer seals, an inlet joint, a cracked tank, or a yard drain or downspout tied into the sewer. The fix is on the basin or the inlet side, not the pump, so the inspection includes the lid and seal, the inlet connection and the ground around the tank. Nothing about that is a homeowner task; if the ground is wet around the lid, stay off it.
What we check
Technician steps for a recurring alarm, beyond the basics.
- The check valve, by watching whether the basin level climbs after a pump cycle with no fixtures running.
- Float and level-sensor condition: grease, position, tether length, whether a float rubs the basin wall. Pressure-switch tubing and the equalizer on E-One.
- Running current under load and how long a cycle takes, compared with the manufacturer's figures.
- Rain entry: lid seal, inlet connection, tank condition, and whether the level rises during rain with the house idle.
- Fixture inflow with a meter test, to catch a toilet flapper or softener that is feeding the basin all day.
- The grinder and inlet for the start of a clog, and the seal-leak circuit on dual-seal pumps.
Keep silencing it?
Silence the horn as often as you need to; that is what the button is for and it does not affect the pump. What you should not do is reset breakers over and over. Myers allows one push of the overload reset and treats a second trip as a damaged pump. A breaker that trips repeatedly is a page of its own.
Still not right? Ask from here
Your name, a way to reach you and what the pump is doing. That is all we need to start. Town and utility are optional.
Sewage backing up or overflowing? Stop using water and call now: (251) 850-8031. On a utility-owned pump, call your utility first.
Questions people ask
Why does my grinder pump alarm keep going off every time it rains?
Rainwater or ground water is getting into the basin. E-One lists this cause by name. The inspection looks at the lid seal, the inlet joint, the tank and anything in the yard tied into the sewer. The pump is usually fine; the basin is taking on water.
The alarm goes off at the same time every day. Why?
Something scheduled is sending water: an irrigation backflow, a softener regeneration, a timed washer, or the morning shower run in a house whose pump is slower than it used to be. Note the time, and tell the technician.
If the alarm clears on its own, do I still need service?
E-One says a self-clearing alarm needs no immediate action but you should consider what caused it, and that frequent alarms warrant a service call. Two or three repeats is frequent.
Does a repeat alarm mean the pump is bad?
Sometimes. A pump losing capacity, a failing seal or a grinder that is partly jammed all cause repeat alarms. So do leaking fixtures and rainwater, which cost far less to fix. The pattern plus a current reading usually settles which.
Sources and facts
- E-One owners guide p.5: if the alarm sounded and then cleared itself, consider what caused it; if the alarm sounds frequently, call for service. E/One Owners Guide (LM000403 Rev G), eone.com/… (read 2026-11-04)
- E-One owners guide p.6: alarm when it rains means rainwater may be getting into the system and overloading it; contact your plumber to investigate. E/One Owners Guide (LM000403 Rev G), eone.com/… (read 2026-11-04)
- Keen O&M p.9: cycles frequently: check valve stuck closed or backwards; ground water entering basin; leaking fixtures; floats moved. Grease and solids accumulate when OFF switch set too high or debris around lower float weight. Red light at control box: lower seal failed, service required. Keen Pump O&M-KPCG (May 2022), keenpump.com/… (read 2026-11-04)
- Liberty PRG manual p.11: pump cycles or runs when no fixtures in use: basin too small, leaking check valve, improper float setting, leaking fixtures. Liberty Pumps ProVore PRG-Series installation manual 2399000, www.libertypumps.com/… (read 2026-11-04)
- BCSS Keen user guide p.14: operation will stop if level sensors build up enough grease to obstruct movement. BCSS-distributed Keen KPCGSL21 grinder station manual, www.baldwincountysewer.com/… (read 2026-11-04)
- Myers manual p.8: push the red reset button once; if it trips again after a short run the pump is damaged; may be a clogged grinder, failed motor or control box fault. Pentair Myers WG(X)20 owner's manual 23833A744, www.pentair.com/… (read 2026-11-04)
- Barnes OGV manual p.12: won't turn off includes excessive inflow; insufficient capacity includes a pump that is the wrong size; cycles too often: check valve, leaking fixtures, ground water entering basin. Barnes OGVF/OGVH installation manual (Form 108890 Rev X), d1pkofokfruj4.cloudfront.net/… (read 2026-11-04)
- BCSS FAQ: alarm over 15 minutes, contact BCSS or a plumber. GSU: contact the Board any time the red light is on. BCSS Grinder Pump FAQs, www.baldwincountysewer.com/…; Gulf Shores Utilities grinder pump page, www.gulfshoresutilities.com/grinder-pump (read 2026-11-04)