Sump Pump Repair in Keller TX: What Failed, What It Costs, and What to Do Right Now

By Ricky McFadden, Licensed Master Plumber | Polly Plumbing | License No. RMP-42199 Serving Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Trophy Club, Roanoke, and all of Tarrant and Denton Counties. Based in Keller, TX.

Sump Pump Repair in Keller TX: What Failed, What It Costs, and What to Do Right Now

Most Keller homeowners discover their sump pump has failed the worst possible way — they find standing water in the garage, utility room, or crawl space after a storm. The pump was there. It just did not run.

Sump pump failures in Keller follow a predictable pattern. The pump sits idle through the dry Texas summer and fall. It gets no use, no testing, no maintenance. Then April arrives, the storms start, and the pump is called on to run for the first time in six to eight months. That is when the float switch sticks, the discharge pipe finds a clog it has been hiding, or a unit that was already aging simply does not come back on.

This guide explains the most common sump pump failures in Keller TX, what each one costs to fix, and how to know whether repair or replacement is the right call. For immediate service call (817) 286-3446.

A Real Call From a Keller Homeowner

Dave called on a Tuesday night during a heavy April storm. Water was pooling in the corner of his finished garage. His sump pump was installed in 2015 during a flooding event that affected several homes in his neighborhood. He had not tested it or serviced it since installation.

Ricky arrived and found standing water roughly two inches deep around the sump basin. The pump motor was running — he could hear it — but no water was being discharged. He checked the discharge line at the exterior wall exit point: blocked. A mud dauber nest had sealed the opening over the winter.

He cleared the discharge line, confirmed the pump was moving water correctly, and then tested the float switch. The float had developed a slight tilt in the basin from years of sitting in the same position without movement. It was riding slightly high on one side, which had caused it to activate late during the storm. Not a full failure but a calibration issue that contributed to the water backup.

Ricky cleared the discharge, reset the float switch to the correct position, tested the pump through three full cycles, and documented everything in writing. He also noted the pump’s age — 10 years old — and gave Dave an honest assessment: the motor appeared healthy but float switches on units this age in Keller’s soil conditions tend to fail progressively. He recommended a battery backup system given the pump’s age and the fact that the storms causing the most flooding in Keller also cause power outages.

Total cost of the service call: the diagnostic and minor repairs. Dave avoided a full replacement that night. He also understood exactly what he was working with going forward.

Why Sump Pump Failures Cluster Around Keller’s Spring Storm Season

Keller and Tarrant County’s storm season runs roughly from late March through June. That period brings the heaviest rainfall totals of the year and, critically, the most severe storm cells that combine high rainfall intensity with lightning and power outages.

The failure pattern Ricky sees repeatedly on Keller sump pump calls has a consistent cause: the pump has been idle since the previous October or November and has not been tested since then. Any mechanical component that sits unused for five to six months in a Texas garage — cycling from freezing temperatures in January to 110-degree heat in August — is under more environmental stress than a component that runs regularly.

Specifically in Keller:

Reactive clay soil around the sump basin. Tarrant County’s expansive clay soil expands and contracts with moisture. The sump basin area absorbs moisture from the surrounding soil. That moisture migration means the basin is never truly dry even in summer. Sediment and clay particles gradually migrate into the basin, coating the float switch assembly and the inlet screen.

Most Keller sump pumps installed after 2015 are now 10 or 11 years old. The flooding events of 2015 and 2019 drove a large number of Keller homeowners to install sump pumps who had never had one before. Units installed in 2015 are now hitting the 10-year mark — the point at which submersible sump pump motors begin to show reliability degradation and float switch mechanisms show wear.

Power outages coincide with the heaviest rainfall. A sump pump without a battery backup is unprotected during the precise conditions it is most needed. Keller regularly experiences power outages during the severe storms that produce the most flooding. A pump that is running fine on utility power provides zero protection the moment the power goes out.

The Five Most Common Sump Pump Failures in Keller TX

Failure 1: Float Switch Stuck or Misaligned

Repair cost: $150 to $300 What it is: The float switch is the sensor that tells the pump when to turn on. It is a buoyant plastic float on an arm or tether that rises with the water level in the basin. When the water reaches a set level, the float triggers the pump. When the water drops, the float drops and the pump shuts off.

Float switches fail in Keller in three ways. They stick in the off position — usually from sediment accumulation or the float touching the basin wall — and the pump never activates even as water rises. They stick in the on position, causing the pump to run continuously even when the basin is empty, burning out the motor. Or the tether or arm becomes misaligned from years of sitting in clay-rich water, causing the activation and shutoff points to drift from their original calibration.

Float switch failure is the most common sump pump problem Ricky sees on Keller service calls. It is also the most commonly misdiagnosed — many homeowners call thinking the pump motor has failed when the issue is simply a stuck float.

Diagnosis: Fill the basin with water from a garden hose and watch whether the pump activates at the correct level. If the motor runs but the float does not trigger it, the float is the issue.

Failure 2: Clogged or Frozen Discharge Line

Repair cost: $89 to $200 depending on access What it is: The discharge line carries water from the pump out of the home to a drain or discharge point away from the foundation. In Keller, discharge lines exit through the garage wall or crawl space wall, typically terminating near the foundation edge or running to a drain.

Three things block discharge lines in Keller: mud dauber and wasp nests sealing the exterior opening in summer (Dave’s situation above), ice forming at the exterior termination during January cold snaps, and slow accumulation of debris inside the line over years of operation.

A blocked discharge line means the pump motor runs but no water moves. The motor burns hotter than normal because it is working against backpressure. Extended operation against a blocked discharge line accelerates motor wear.

Diagnosis: Run the pump and listen at the exterior discharge termination for water flow. No water at the exterior while the pump runs indicates a blocked line.

Failure 3: Motor Failure

Repair cost: Replacement $400 to $800 (motor replacement typically not cost-effective vs. full unit replacement) What it is: The submersible pump motor is the core mechanical component. It is submerged in the sump basin and runs in wet conditions for the unit’s entire service life. Motor failure presents as a pump that does not run at all, or that runs but produces no water movement despite a clear discharge line and correctly functioning float.

Motor failure in Keller sump pumps is most common on units that are 8 or more years old. Contributing factors in this market include: sediment accumulation in the basin scratching the motor seal, calcium and mineral scale from Tarrant County hard water on the impeller, and thermal stress from the extreme garage temperature cycles the units experience.

When a sump pump motor fails, the repair cost equals or exceeds a new unit in most cases. Polly Plumbing quotes both options on every motor failure call so the homeowner can make an informed decision with full cost information.

Failure 4: No Power to the Pump

Repair cost: $0 to $150 depending on cause What it is: Before assuming any mechanical failure, confirm the pump is receiving power. Sump pump outlets in Keller garages are often GFCI-protected. A GFCI outlet that has tripped — from moisture, a power surge during a storm, or simple age — cuts power to the pump silently. The pump appears dead but is simply unpowered.

Check the outlet with a phone charger or lamp before calling a plumber. Check the GFCI reset button on the outlet itself and on any associated GFCI outlet on the same circuit. Check the circuit breaker.

Ricky finds a tripped GFCI as the cause of an apparent pump failure more often than most homeowners expect. It is the first check on every sump pump service call.

Failure 5: Overwhelmed Capacity

Repair cost: Second pump installation or upgrade to higher-capacity unit: $400 to $800+ What it is: Some Keller homes have undersized sump pumps for the drainage area they are protecting or the rainfall intensity they encounter during severe storms. The pump runs continuously and correctly but simply cannot move water fast enough to keep pace with the inflow rate during a heavy storm cell.

Signs of overwhelmed capacity: the pump runs non-stop during a storm but water still rises in the basin, or the pump runs so frequently it overheats and trips a thermal cutoff. This is not a repair situation — it is a sizing or redundancy situation. The solution is either a higher-capacity primary pump or adding a secondary pump in the same basin.

Repair vs Replace: The Honest Framework for Keller Sump Pumps

The repair-versus-replace decision follows a straightforward framework based on age, failure type, and whether a battery backup is in place.

Repair makes sense when: The unit is under 7 years old. The failure is a float switch, discharge line blockage, or power issue — not the motor. The motor is confirmed functional. The unit does not have a battery backup and this is a good opportunity to add one.

Replacement makes sense when: The unit is 8 or more years old. The motor has failed. The float switch has failed on a unit that is also showing motor noise or reduced flow rate. The unit has failed twice in the same storm season. Any unit that is 10 or more years old in Keller’s operating environment warrants a replacement conversation even if it has not yet failed.

The battery backup conversation: For any Keller sump pump service call, Ricky discusses battery backup regardless of whether the primary pump is being repaired or replaced. A functioning sump pump that loses power during the storm that is causing the flooding protects nothing. Battery backup systems add $300 to $600 to an installation and provide 8 to 24 hours of pumping capacity on battery power depending on the unit and the inflow rate.

Sump Pump Costs in Keller TX

All pricing includes parts and labor. Written quote before any work begins. No emergency surcharge — same-day sump pump service in Keller is priced the same as a scheduled visit.

Testing Your Sump Pump Before Storm Season

The best time to find out your sump pump is not working is not during a storm. The best time is on a dry day in late March, before Keller’s storm season begins.

A functional test takes three minutes. Pour a five-gallon bucket of water into the sump basin. The float should rise and the pump should activate within seconds. Water should discharge from the exterior termination point within 30 seconds. The pump should shut off when the water level drops below the float setpoint.

If the pump does not activate, check GFCI first. If the pump activates but no water discharges at the exterior, check the discharge line termination for blockage. If the pump activates and discharges but shuts off late or not at all, the float switch needs adjustment or replacement.

If you run this test and anything is not right, call Polly Plumbing before the first major storm. Pre-season service calls are scheduled and priced the same as any other visit. The difference is you are not calling from inside a flooded garage at 11pm.

For complete sump pump repair, installation, and maintenance services in Keller, see our sump pump services page.

What Polly Plumbing Does on Every Keller Sump Pump Call

When you call Polly Plumbing for sump pump service in Keller, Ricky asks three questions before arriving: is there currently standing water, is the pump running at all, and how old is the unit if known. You get a text with his photo before he knocks.

On arrival Ricky checks power first — GFCI, breaker, outlet. Then the float switch operation. Then the discharge line. Then the motor. He tells you what he finds in plain language before recommending anything. If it is a float switch, he tells you it is a float switch and what it costs to fix it. If the motor is gone on a 10-year-old unit, he tells you that too and gives you a replacement quote on the spot.

Every finding goes into a written visit summary. If a battery backup is warranted based on the unit’s age or your flood risk profile, Ricky notes it in the summary with the cost so you can decide on your own timeline rather than in the middle of a storm.

To prevent repair calls with annual testing and service, see our sump pump maintenance guide for Keller TX.

Other Tarrant and Denton County areas served for sump pump repair and installation: Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Trophy Club, Roanoke, and all of Tarrant County and Denton County.

There is no emergency surcharge at Polly Plumbing. Same-day sump pump service in Keller is priced the same as a scheduled visit. Call (817) 286-3446.

Frequently Asked Questions About Sump Pump Repair in Keller TX

How much does sump pump repair cost in Keller TX?

Float switch replacement runs $150 to $300. Discharge line clearing runs $89 to $200. A full sump pump replacement runs $400 to $800. Adding a battery backup system runs $300 to $600. The $89 dispatch fee is waived for PollyCare members. All pricing includes parts and labor with a written quote before any work begins. Call Polly Plumbing at (817) 286-3446 for same-day sump pump service in Keller.

My sump pump is running but water is still rising. What is wrong?

Three possible causes. First, the discharge line may be blocked — the pump is running but water is not exiting. Check the exterior discharge termination for blockage. Second, the pump may be overwhelmed — it is running correctly but the inflow rate during a heavy storm exceeds the pump’s capacity. Third, the float switch may be set too high, causing the pump to activate later than optimal. Ricky diagnoses the specific cause on every Keller sump pump call before recommending any repair.

My sump pump is not running at all. What should I check first?

Check the GFCI outlet the pump is plugged into. GFCI outlets trip silently and cut power without any visible indication. Press the reset button on the outlet itself. If the outlet has power but the pump still does not run, check the circuit breaker. If power is confirmed and the pump does not run, the float switch or motor has failed. Call Polly Plumbing at (817) 286-3446 for a same-day diagnosis.

Should I repair or replace my Keller sump pump?

Repair makes sense for units under 7 years old with a float switch, discharge, or power issue — not a motor failure. Replacement makes sense for units 8 or more years old, any unit with a failed motor, and any unit that has failed twice in the same storm season. Most Keller sump pumps installed after the 2015 flooding events are now 10 to 11 years old and entering replacement territory. Ricky gives you both options with pricing on every service call so the decision is yours with full information.

Do I need a battery backup sump pump in Keller TX?

Yes, strongly recommended. Keller’s spring storm season brings heavy rainfall and power outages together — the precise combination that makes a primary pump without backup useless. A battery backup system adds $300 to $600 to an installation and provides 8 to 24 hours of pumping capacity when utility power fails. For any home with a sump pump that is more than 5 years old without a backup, Ricky discusses the battery backup option on every service call.

How often should I test my sump pump in Keller TX?

Test it once in late March before Keller’s storm season begins, and once in October before winter. Pour five gallons of water into the basin and confirm the pump activates, moves water to the exterior discharge point, and shuts off correctly. A test that takes three minutes in March can prevent a flooded garage in April. If anything does not function correctly during the test, call Polly Plumbing at (817) 286-3446 for a pre-season service visit.

Why do sump pumps fail during Keller storms?

The most common pattern in Keller is a pump that has sat unused through the dry summer and fall, operated in reactive clay soil conditions, and is called on to run for the first time in six to eight months during a storm. Float switches stick from sediment accumulation in the basin. Discharge lines find blockages that have been building since the last storm season. Motors that were marginal show their age under load. The solution is pre-season testing in late March and a service call to address any issues before the first significant storm hits.

Written by Ricky McFadden, Licensed Master Plumber, Polly Plumbing. Texas License RMP-42199. Based in Keller, TX. Serving Tarrant and Denton Counties.

Published: May 2026. Last reviewed: May 2026.