Foundation services
Sump pump repair: why it is not working
Sump pump repair starts with the symptom: a pump that will not run, runs nonstop, cycles every few seconds, or hums without moving water.
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Written by HyreFoundation Research Desk Primary-source research and fact checking
The short answer
Sump pump repair starts with the symptom: a pump that will not run, runs nonstop, cycles every few seconds, or hums without moving water. Most failures trace to power, a stuck float switch, a clogged intake or a failed check valve, and several are fixable in minutes. Old pumps often get replaced rather than rebuilt.
Key takeaways
A tripped breaker or GFCI causes many "dead pump" calls.
against the pit wall or cord.
often points to a failed check valve or an undersized pit.
Test it before rain season.
What is your pump doing?
check the breaker, outlet and GFCI, then lift the float by hand.
the float may be stuck up, the pump may be too small, or water may be flowing back from the discharge.
water falling back through a failed check valve, or the float set too tight.
clogged intake, jammed impeller or an air lock.
debris, a worn bearing, or the discharge pipe vibrating.
How do you test a sump pump?
With power off, clear debris from the pit and intake screen.
Pour water into the pit slowly. The float should rise, the pump start and the level drop.
Confirm water exits at the outlet and the line is not frozen or crushed.
Unplug the primary and check that any backup pump takes over.
What moves the price
Repair or replace comes down to age and the part that failed. We publish no price figures until we hold enough sourced, dated quotes; see what drives foundation costs.
| Factor | Why it changes the number |
|---|---|
| Part | A float switch or check valve is a small part; a motor is not. |
| Pump age | An old pump with a failed motor is usually replaced. |
| Access | Submersible pumps in tight pits take more effort to pull. |
HyreFoundation publishes no national average price for this work. Depth to bearing, soil, access and method vary enough between two houses on the same street that a single figure would mislead.
When should the pump be replaced?
When the motor has failed, the pump is old and has needed repeated repairs, or it cannot keep up in heavy rain. Consider adding a battery backup at the same time.
What to ask before you sign
The full checklist is on choosing a foundation contractor.
Where this goes wrong
Unplug the pump first. Water and electricity together are dangerous.
A frozen outlet makes a working pump look broken.
A five-minute bucket test catches most failures.
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Questions
Why is my sump pump not turning on?
Why does my sump pump run constantly?
How often should I test my sump pump?
Can I replace a sump pump myself?
Written and audited by
HyreFoundation Research Desk
Primary-source research and fact checking
We read the model building code, the federal soil and moisture guidance and the insurer position ourselves, and we publish each figure with the document it came from and the date we retrieved it.
Where a number cannot be traced to a primary source, we say so instead of printing it. HyreFoundation does not inspect, engineer or repair foundations. Authorship is organizational: this desk, not a named persona.
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How this desk works
- Primary sources only. Code statements come from the International Residential Code, Chapter 4, as the model code. Soil statements come from USDA and USGS. Insurance statements come from the policy language and the Insurance Information Institute. We open the source rather than cite a blog that cites it.
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Authorship on this site is organizational: the analysis belongs to the desk rather than to a named individual, and we do not publish credentials we do not hold. Our editorial policy sets out how we source, date and correct what we publish.
Sources & retrieval dates
Information on this page is general and varies with soil, climate, foundation type, building code, insurance policy and circumstance.
It is not engineering, insurance or legal advice, and no page can tell you whether your house has a structural problem: that needs a licensed professional on site.
HyreFoundation is an independent foundation resource, not a repair contractor or an engineering firm, and does not perform, supervise or warrant foundation work.