Common Causes Of Sump Pump Failure During Heavy Storms
You’re standing at the top of the basement stairs during a downpour, and you can hear it, that wet, gurgling sound that means water’s where it shouldn’t be. Maybe the pump’s dead silent. Maybe it’s running flat out and the pit’s still filling anyway. Either way, you’ve got minutes, not hours, before this turns into a real mess. Most folks never think about the pump in the corner until the night it lets them down.
Power outages during the storm
Here’s the cruel part. The same North Texas storm system that’s dumping water into your yard is the one knocking out the grid. Your pump runs on electricity. No power, no pumping simple as that.
I pulled up to a house over in the White Rock area of Dallas last spring where the pump was in perfect shape. It just had nothing to run on for six hours, and by then the crawl space was a swimming pool. That’s the most preventable sump pump failure I see all year.
A battery backup or a water-powered backup fixes it. One caveat, though a backup you’ve never tested is just a paperweight. Check it before the season, not during it.
It’s running but the water keeps climbing
This one throws people. The motor’s humming, the pump’s clearly working, and the water in the pit won’t go down.
Usually it’s the discharge line. Leaves, mud, a tangle of roots, or a critter that decided the pipe made a nice home anything that blocks the line means the water gets pushed out, has nowhere to go, and drains right back into the pit. The pump just recycles the same water until it gives up.
The other cause is a pump that’s too small for a real Dallas gully-washer. A cheap third-horsepower unit handles a drizzle fine and drowns in a four-inch night.
Don’t overcorrect, though. Oversize the pump and it short-cycles kicks on, empties the pit in two seconds, shuts off, repeats and that hammering wears the motor out years early.
The float switch quit on you
Nine times out of ten, when I find a sump pump failure on a unit that’s otherwise healthy, the float switch is the culprit.
The float’s the trigger. Water rises, the float rises with it, and at a certain point it tells the motor to fire. When that float jams against the side of the pit or gets gummed up with sediment, the signal never comes. The water climbs and the pump sits there doing nothing.
It’s a cheap part and usually a thirty-minute fix. Quick caveat the old tethered floats hang up far more often than the newer vertical ones, especially in a narrow pit where there’s no room to swing. If yours sticks more than once, that’s the pit talking, not bad luck.
The pump’s old and nobody’s looked at it in years
Sump pumps last seven to ten years. That’s it. After a decade the motor weakens and the impeller wears down, and one hard night is all it takes to trigger a sump pump failure that a newer unit would’ve shrugged off.
The flip side is maintenance, or the lack of it. A homeowner in Garland once told me he’d never touched his pump in twelve years. It owed him nothing and it quit during the first real storm of the season.
Test it yourself once a year: pour a bucket of water in the pit and confirm the pump kicks on and clears it. That part’s fine to DIY.
Replacing the unit is where I’d stop, though. Discharge routing is regulated in most North Texas towns you can’t just dump it onto a neighbor’s lot or tie into the sanitary sewer and getting that wrong fails inspection.
Don’t wait for the next storm to find out
A flooded crawl space doesn’t stay a pump problem for long. Once water hits the drywall and framing, you’re looking at thousands in repairs from a sump pump failure an hour of service could’ve caught. If your pump’s giving you any reason to doubt it, get it checked before Dallas storm season. When you want the best, call Du-West.
Frequently Asked Questions
How often do I actually need to check this thing?
Once a year, minimum ideally right before Dallas storm season. Pour a bucket in the pit and confirm it kicks on. Most of the sump pump failure calls I get started as something small a yearly test would’ve caught.
How long’s a sump pump supposed to last?
Seven to ten years for most units. Heavy use and zero maintenance can cut that down fast. If yours is past the decade mark, don’t wait for a sump pump failure to replace it budget for it now while it’s still your choice.
My pump runs nonstop should I worry?
Yeah, that’s worth a look. Constant running usually points to a stuck float or a clogged discharge line sometimes just a pump that’s too small for the job. Any of those leaves you one bad night from a sump pump failure, so don’t let it ride.
Do I really need a battery backup?
In North Texas? I’d say yes. Our worst rainstorms knock the power out right when the pump’s needed most, and a backup is the only thing running while the grid’s down. Skip it and you’re trusting the lights to stay on mid-storm.
My basement’s flooding right now what do I do?
Call a pro immediately, then cut power to that area if you can reach the breaker safely. Don’t wade into standing water near outlets or the pump. A sump pump failure mid-storm is an emergency, not a wait-till-Monday situation keep people and pets clear until someone’s assessed it.
Test that pump before the next big one bucket in the pit, listen for the kick-on. Beats finding out the hard way.
