Sewage pump running continuously — is it dangerous?
A sewage pump that runs constantly is a warning sign that the system is under stress or failing to operate correctly. This guide explains why continuous running happens, the risks involved, and when urgent action is needed.
A pump that runs continuously is often struggling to cope with demand or unable to shut down correctly. Left unresolved, this can lead to overheating, motor failure and eventual sewage backup.
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Why sewage pumps run continuously
Continuous pump operation is usually caused by control faults, rising inflow or mechanical issues. Identifying the cause early helps prevent overheating, failure and flooding.
Request diagnosis →High inflow rate
Incoming wastewater exceeds the pump’s ability to clear the chamber.
Partial blockage
Debris restricts flow, forcing the pump to run longer than normal.
Float switch fault
A stuck or failed float prevents the pump from switching off.
Control panel issue
Relay or control logic faults keep the pump energised.
Thermal overload risk
Extended run times increase heat and motor stress.
Incorrect pump sizing
An undersized pump struggles to meet system demand.
Infiltration or leaks
Groundwater ingress increases flow beyond normal levels.
Worn components
Reduced efficiency forces longer run cycles.
Why continuous running should not be ignored
Prevents motor burnout and failure
Early intervention reduces risk, cost and long-term system damage.
Reduces risk of sewage flooding
Early intervention reduces risk, cost and long-term system damage.
Avoids emergency call-out costs
Early intervention reduces risk, cost and long-term system damage.
Extends pump system lifespan
Early intervention reduces risk, cost and long-term system damage.
Frequently asked questions
Is it dangerous if my sewage pump runs continuously?
Yes. Continuous operation can overheat the motor and lead to sudden pump failure.
Can a blockage cause a pump to run constantly?
Yes. Partial blockages reduce flow, forcing the pump to run longer than designed.
Should I turn the pump off?
If safe to do so, reduce water use and contact a pump engineer for diagnosis.
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Sewage pump running continuously?
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